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Browse 375 focused utilities and 955 dedicated conversion pages. Every listed route is implemented and searchable.

375 utilities955 converters100% browser-side

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Data tools

Format, validate, and convert structured data without sending it away.

63 utilities · 225 converter pages

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JSON Formatterformat compact JSON into readable, indented data.

JSON Validatorcheck JSON syntax and pinpoint common errors.

JSON Minifierremove insignificant whitespace from valid JSON.

JSON to CSVturn an array of flat JSON objects into CSV.

CSV to JSONconvert a CSV table with headers into JSON records.

CSV Validatorvalidate row widths, quoting, and table structure before importing CSV.

YAML Formatter & Beautifiervalidate and format YAML into a clean, readable structure.

XML Formatterindent valid XML, XHTML, and XML configuration documents for easier reading.

XML Validatordetect XML parsing errors in supplied markup.

XML Minifierremove whitespace between XML elements.

JSON Key Sortersort object keys recursively while preserving array order and values.

JSON Flattenflatten nested JSON objects into configurable dot-path keys.

JSON Unflattenrebuild nested JSON objects and arrays from dot-path keys.

JSON Null & Empty Value Cleanerremove null, empty-string, empty-array, and empty-object values recursively.

JSONLines Validatorvalidate one JSON value per non-empty line and report the record count.

JSON String Escape / Unescapeescape text as a JSON string literal or restore a JSON string to text.

CSV Statisticsanalyze CSV dimensions, empty cells, duplicate rows, and column completeness.

JSON Tree Viewerrender nested objects and arrays as an indented text tree with value types.

JSON Diffcompare two valid JSON documents by path and report added, removed, and changed values.

JSON Path Testerresolve a safe JSONPath subset using dot properties, quoted properties, and numeric array indexes.

JSON Path Generatorlist stable paths for every leaf value in a JSON document.

JSON Duplicate Key Checkerdetect repeated keys within the same JSON object before parsers overwrite them.

JSONLines Formattervalidate and normalize JSONLines so each non-empty line contains one compact JSON value.

JSON Sample Data Generatorgenerate a repeatable array of sample records from a JSON object template.

CSV Viewerdisplay CSV records as a readable fixed-width table without executing spreadsheet formulas.

CSV Formatterparse CSV quoting and emit a consistent canonical delimited table.

CSV Column Extractorselect named CSV columns and preserve their requested order.

CSV Column Reordererreorder every CSV column by an explicit header-name list.

CSV Duplicate Row Removerremove exact duplicate data rows while retaining the header and first occurrence.

CSV Sortersort CSV records by a named column with numeric-aware comparison.

CSV Filterkeep CSV rows whose selected column contains or exactly matches a value.

CSV Searchsearch every CSV cell case-insensitively and return matching rows with headers.

CSV Transposeswap CSV rows and columns while retaining empty cells.

CSV Delimiter Converterconvert between comma, semicolon, pipe, and tab delimiters with correct quoting.

CSV Quote & Escape Fixerrepair common quote escaping, validate row widths, and rewrite delimited data with consistent doubled quotes.

Column to Comma-Separated String Converterturn one value per line into a correctly quoted comma, semicolon, pipe, or tab-separated list.

Comma-Separated String to Column Converterparse one quoted delimited record into a clean one-value-per-line column without splitting delimiters inside quotes.

CSV Splittersplit CSV records into labeled chunks that each repeat the original header.

CSV Mergermerge CSV datasets with identical headers separated by a clear document marker.

XPath Testerevaluate a browser-native XPath expression against valid XML and serialize matching nodes or scalar results.

XML Escape / Unescapeescape XML-significant characters or decode well-formed XML entity text.

XML Tree Viewerrender elements, attributes, and non-empty text nodes as a readable hierarchy.

XML Attribute Extractorlist XML element paths, attribute names, and values as CSV.

YAML Validator & Syntax Checkervalidate YAML syntax with the JSON-safe schema and report the root value type.

YAML Compact Flow Formatterserialize valid YAML into compact flow style without changing its parsed JSON-safe values.

YAML Key Sortersort mapping keys recursively while retaining sequence order.

TOML Formatterparse TOML and serialize it with consistent tables, arrays, strings, and spacing.

TOML Validatorvalidate TOML syntax and report the number of top-level keys.

INI Formatterparse INI sections and key-value pairs and emit consistent equals-sign formatting.

ENV File Parserparse dotenv-style assignments into JSON without expanding variables or executing commands.

JSON to ENVconvert a flat JSON object with valid variable names and scalar values into dotenv assignments.

Properties File Parserparse common Java properties key-value syntax and Unicode escapes into JSON.

Fake JSON Data Generatorgenerate deterministic user-shaped JSON records for demos, fixtures, and UI testing.

Mock API Response Generatorwrap JSON data in a predictable HTTP-style status, headers, body, and mock metadata structure.

JSON Schema Generatorinfer a draft 2020-12 JSON Schema from the structure and primitive types in sample JSON.

JSON Schema Validatorvalidate JSON against a safe static subset of JSON Schema type and structural keywords.

JSON Schema Formattervalidate and pretty-print a JSON Schema document for review and version control.

Data URI Generatorencode UTF-8 text as a Base64 data URI with an explicit MIME type.

MIME Type Lookuplook up common MIME types by extension or list extensions for an exact MIME type.

File Extension Lookupidentify the common MIME type and broad file category for a filename or extension.

Properties File Beautifiernormalize Java-style properties assignments, comments, escaped values, and continuation indentation.

ENV File Beautifiernormalize dotenv assignments and comments without expanding variables or executing substitutions.

HOCON Beautifierapply readable spacing and indentation to common HOCON objects, arrays, assignments, substitutions, and comments.

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Developer tools

Debug, test, format, and generate values used in everyday development.

89 utilities · 276 converter pages

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Regex Testertest a JavaScript regular expression against text.

SQL Formatter & Beautifierformat common SQL statements for easier review without executing them.

UUID Generatorgenerate cryptographically random UUID v4 values.

UUID Validatorvalidate UUID structure and report its encoded version.

URL Validatorvalidate an absolute HTTP or HTTPS URL and normalize its representation.

Python Beautifierformat Python source into a consistent, readable layout without compiling or executing it.

C# Beautifierformat C# source into a consistent, readable layout without compiling or executing it.

PHP Beautifierformat PHP source into a consistent, readable layout without compiling or executing it.

Go Beautifierformat Go source into a consistent, readable layout without compiling or executing it.

Ruby Beautifierformat Ruby source into a consistent, readable layout without compiling or executing it.

Swift Beautifierformat Swift source into a consistent, readable layout without compiling or executing it.

Kotlin Beautifierformat Kotlin source into a consistent, readable layout without compiling or executing it.

Rust Beautifierformat Rust source into a consistent, readable layout without compiling or executing it.

Objective-C Beautifierformat Objective-C source into a consistent, readable layout without compiling or executing it.

Perl Beautifierformat Perl source into a consistent, readable layout without compiling or executing it.

Scala Beautifierformat Scala source into a consistent, readable layout without compiling or executing it.

SCSS Beautifierformat SCSS source into a consistent, readable layout without compiling or executing it.

SASS Beautifierformat Sass source into a consistent, readable layout without compiling or executing it.

LESS Beautifierformat LESS source into a consistent, readable layout without compiling or executing it.

JSX Beautifierformat JSX source into a consistent, readable layout without compiling or executing it.

Vue SFC Beautifierformat Vue Single-File Component source into a consistent, readable layout without compiling or executing it.

Svelte Beautifierformat Svelte source into a consistent, readable layout without compiling or executing it.

Protobuf (.proto) Beautifierformat Protocol Buffers schema source into a consistent, readable layout without compiling or executing it.

SPARQL Beautifierformat SPARQL source into a consistent, readable layout without compiling or executing it.

MongoDB Query Beautifierformat MongoDB query source into a consistent, readable layout without compiling or executing it.

PL/SQL Beautifierformat PL/SQL source into a consistent, readable layout without compiling or executing it.

Bash / Shell Script Beautifierformat Bash shell source into a consistent, readable layout without compiling or executing it.

PowerShell Beautifierformat PowerShell source into a consistent, readable layout without compiling or executing it.

Batch (.bat) Beautifierformat Windows Batch source into a consistent, readable layout without compiling or executing it.

Dockerfile Beautifierformat Dockerfile source into a consistent, readable layout without compiling or executing it.

Makefile Beautifierformat Makefile source into a consistent, readable layout without compiling or executing it.

LaTeX Beautifierformat LaTeX source into a consistent, readable layout without compiling or executing it.

reStructuredText Beautifierformat reStructuredText source into a consistent, readable layout without compiling or executing it.

AsciiDoc Beautifierformat AsciiDoc source into a consistent, readable layout without compiling or executing it.

Cron Expression Beautifiervalidate a standard five-field cron expression and label each field for readable review.

Regex Beautifiervalidate a JavaScript-compatible regular expression and produce a readable, non-executable structural view.

.htaccess Beautifierformat Apache .htaccess source into a consistent, readable layout without compiling or executing it.

Nginx Config Beautifierformat Nginx configuration source into a consistent, readable layout without compiling or executing it.

CSS Formatterformat CSS rules with consistent indentation and declarations.

JavaScript Formatternormalize indentation around JavaScript blocks without executing code.

TypeScript Formatternormalize indentation around TypeScript blocks without compiling code.

GraphQL Formatterformat GraphQL operations and selection sets for review.

Markdown Formatternormalize Markdown spacing, headings, lists, and trailing whitespace.

Java Formatternormalize indentation around Java blocks without compiling source.

C / C++ Formatternormalize indentation around C and C++ blocks without compiling source.

CSS Minifierremove CSS block comments and insignificant whitespace while preserving quoted string content.

JavaScript Whitespace Minifierremove JavaScript comments and conservative whitespace without executing or renaming source code.

SVG Minifierremove comments and inter-element whitespace from valid SVG markup.

SQL Minifiercollapse SQL whitespace outside quoted values without executing statements.

Regular Expression Validatorcompile a JavaScript regular expression and report supported flags.

Email Address Validatorvalidate common mailbox and domain syntax without claiming deliverability.

IP Address Validatorvalidate canonical IPv4 or IPv6 address structure.

JWT Structure Validatorvalidate the three-part JWT envelope and decode JSON sections without verifying trust.

Cron Expression Validatorvalidate a standard five-field cron expression and its numeric ranges.

Text Diff Checkercompare two text blocks line by line and report additions, removals, and unchanged lines.

Regex Builderbuild an escaped regular expression from literal text and match preferences.

Regex Explanation Toolexplain common regular-expression tokens in plain language.

Cron Expression Testershow the next matching minute values for a five-field cron schedule.

Cron Expression Generatorgenerate a five-field cron expression from a common schedule preset.

User-Agent Parseridentify common browser, engine, operating-system, and device hints.

HTTP Header Parserparse HTTP header lines into normalized names and values.

Cookie Parserparse a Cookie request header into decoded name-value pairs.

Stack Trace Formatternormalize stack-trace indentation and separate exception headers from frames.

Error Log Formatterbeautify JSON Lines and group timestamped structured log entries into a readable diagnostic report.

API Response Formatterformat a JSON API response and summarize status-like fields.

HTTP Request Builderbuild an HTTP request preview from method, URL, headers, and body.

cURL Generatorgenerate a reviewable cURL command from an HTTP request description.

cURL to Fetchtranslate a supported cURL command into browser Fetch API code.

cURL to Axiostranslate a supported cURL command into Axios request code.

HTTP Status Code Lookuplook up standard meaning and category for a common HTTP status code.

HTTP Method Referencesummarize safety, idempotency, and typical use for an HTTP method.

Content-Type Generatorgenerate a Content-Type header for a common media type and optional charset.

Cache-Control Generatorbuild a Cache-Control policy from explicit caching behavior.

CORS Header Generatorgenerate a conservative CORS response-header set for an explicit origin.

Content Security Policy Generatorgenerate a restrictive baseline Content-Security-Policy header.

OpenAPI Formattervalidate and format an OpenAPI JSON document for review.

UUID v7 Generatorgenerate time-ordered RFC 9562 UUID version 7 identifiers.

NanoID Generatorgenerate URL-friendly secure NanoID-style identifiers.

API Key Generatorgenerate a prefixed, cryptographically secure API key for development.

Advanced Git Command Generatorbuild reviewable Git commands for repository, branch, remote, commit, tag, stash, rebase, worktree, and submodule workflows.

Advanced .gitignore Generatorgenerate a documented .gitignore for modern language, framework, editor, operating-system, build, log, and local-secret artifacts.

.gitignore Rule Analyzeranalyze .gitignore rules by section, negation, directory scope, wildcard usage, duplication, and potentially risky patterns.

Git Diff Formatternormalize a unified Git diff and summarize changed files, hunks, additions, and removals without altering patch content.

Conventional Commit Message Buildergenerate a Conventional Commit subject, optional body, issue reference, and breaking-change footer.

Git Branch Name Generatorcreate a safe, readable Git branch name from a work-item description, workflow prefix, and optional ticket identifier.

Semantic Version Generatorincrement a stable semantic version and optionally create an alpha, beta, or release-candidate prerelease.

Semantic Version Validatorvalidate a Semantic Versioning 2.0.0 value and identify prerelease metadata.

Conventional Commit Changelog Buildergroup Conventional Commit lines into a versioned Markdown changelog with added, fixed, performance, security, documentation, and maintenance sections.

Code Comparison and Diffcompare two source files or code versions in synchronized editors with line-level changes, navigation, search, and patch export.

Text tools

Clean, count, analyze, and reshape text in a focused workspace.

55 utilities · 364 converter pages

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Word & Character Countercount words, characters, lines, sentences, and reading time.

Case Converterswitch text between upper, lower, title, camel, Pascal, snake, and kebab case.

Remove Duplicate Lineskeep the first occurrence of each repeated line.

Text Line Sortersort lines alphabetically while preserving their content.

Reverse Linesreverse line order without reversing the characters inside each line.

Remove Empty Linesremove blank and whitespace-only lines while retaining non-empty content.

Whitespace Cleanertrim lines and collapse repeated spaces without changing line order.

Text Statisticsreport words, characters, lines, paragraphs, sentences, and reading time.

Word Frequency Countercount normalized word occurrences and rank the most frequent terms.

Letter Frequency Countercount Unicode letters case-insensitively and sort by frequency.

Keyword Density Checkermeasure exact normalized keyword frequency as a percentage of words.

Reading Level Checkerestimate Flesch reading ease and grade level from English prose.

UPPERCASE Converterconvert text into UPPERCASE consistently.

lowercase Converterconvert text into lowercase consistently.

Title Case Converterconvert text into Title Case consistently.

Sentence case Converterconvert text into Sentence case consistently.

camelCase Converterconvert text into camelCase consistently.

PascalCase Converterconvert text into PascalCase consistently.

snake_case Converterconvert text into snake_case consistently.

kebab-case Converterconvert text into kebab-case consistently.

CONSTANT_CASE Converterconvert text into CONSTANT_CASE consistently.

dot.case Converterconvert text into dot.case consistently.

Shuffle Linesrandomize line order with browser cryptographic randomness.

Trim Linesremove leading and trailing whitespace from every line.

Remove Line Breaksjoin non-empty lines with a configurable separator.

Line Break Converternormalize line endings to LF, CRLF, or CR.

Find and Replacereplace literal or regular-expression matches with a chosen value.

Text Mergermerge text blocks separated by a document marker.

Text Splittersplit text by a literal delimiter into numbered parts.

Prefix / Suffix Adderadd a prefix and suffix to each non-empty line.

Number Linesadd configurable sequential numbers to every line.

Remove Line Numbersremove common numeric line-number prefixes.

URL Extractorextract unique url values in first-seen order.

Email Extractorextract unique email values in first-seen order.

Hashtag Extractorextract unique hashtag values in first-seen order.

Mention Extractorextract unique mention values in first-seen order.

Number Extractorextract unique number values in first-seen order.

Domain Extractorextract unique domain values in first-seen order.

IP Address Extractorextract unique ip address values in first-seen order.

Date Extractorextract unique date values in first-seen order.

Smart Quote Converterreplace straight quotation marks with readable directional quotes.

Straight Quote Converterreplace common curly quotation marks with ASCII quotes.

Tabs and Spaces Converterconvert indentation tabs to spaces or complete space groups to tabs.

Invisible Character Detectoridentify control, zero-width, non-breaking, and unusual whitespace characters.

Unicode Character Inspectorlist each Unicode code point, character, and broad category hint.

Unicode Normalizernormalize Unicode text to NFC, NFD, NFKC, or NFKD.

Lorem Ipsum Generatorgenerate deterministic placeholder paragraphs for layout testing.

Morse Code Translatortranslate Latin letters, digits, and common punctuation to or from International Morse code.

NATO Alphabet Convertertranslate letters and digits into the NATO spelling alphabet.

Text Repeaterrepeat supplied text a bounded number of times.

Text Reverserreverse Unicode grapheme-like characters without changing input elsewhere.

Markdown Table Generatorconvert CSV-like rows into a valid Markdown table.

Plain Text Extractorextract readable text from HTML and decode entities.

Social Character Countercompare text length with common X, meta-description, and title limits.

Text and String Comparisoncompare two text versions by line with similarity, additions, removals, modifications, filtering, and export.

Encode & decode

Translate base, URL, character, and developer encodings safely.

32 utilities

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Base64 Encoderencode Unicode text as Base64.

Base64 Decoderdecode Base64 into readable UTF-8 text.

URL Encoderpercent-encode text for safe use in URL components.

URL Decoderdecode percent-encoded URL text.

HTML Entity Encoderescape HTML-significant characters as entities.

HTML Entity Decoderdecode HTML entities into plain text.

Base64URL Encoderencode Unicode text with the URL-safe Base64 alphabet and no padding.

Base64URL Decoderdecode a URL-safe Base64 value into UTF-8 text.

Base16 / Hex Encoderencode UTF-8 text using the Base16 / Hex representation.

Base16 / Hex Decoderdecode UTF-8 text using the Base16 / Hex representation.

Base32 Encoderencode UTF-8 text using the Base32 representation.

Base32 Decoderdecode UTF-8 text using the Base32 representation.

Base58 Encoderencode UTF-8 text using the Base58 representation.

Base58 Decoderdecode UTF-8 text using the Base58 representation.

Ascii85 Encoderencode UTF-8 text using the Ascii85 representation.

Ascii85 Decoderdecode UTF-8 text using the Ascii85 representation.

URL Builderbuild a normalized absolute URL from a base address and query parameters.

UTM URL Builderadd correctly encoded UTM campaign parameters to an absolute URL.

URL Normalizer and Cleanernormalize an absolute URL and optionally remove tracking parameters.

Text to Binaryencode Unicode text with binary code values.

Binary to Textdecode Unicode text with binary code values.

Text to Hexencode Unicode text with hex code values.

Hex to Textdecode Unicode text with hex code values.

Text to Decimalencode Unicode text with decimal code values.

Decimal to Textdecode Unicode text with decimal code values.

Text to Octalencode Unicode text with octal code values.

Octal to Textdecode Unicode text with octal code values.

Unicode Escape Encoderencode Unicode text with unicode escape code values.

Unicode Escape Decoderdecode Unicode text with unicode escape code values.

Data URI Decoderdecode text-based Base64 or percent-encoded data URIs and report their media type.

Punycode Domain Converterconvert internationalized domain names between Unicode and ASCII forms.

MIME Header Encoder / Decoderencode or decode UTF-8 RFC 2047 encoded-word header values.

Security tools

Generate secure values, calculate digests, and inspect security configuration.

28 utilities

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Strong Password Generatorgenerate a strong password with cryptographically secure randomness.

Random String Generatorcreate secure random identifiers from a selected alphabet.

SHA-256 Hash Generatorcalculate a SHA-256 digest for UTF-8 text.

JWT Inspectordecode JWT header and payload claims locally without claiming signature verification.

Multi-Hash File & Text Generatorcalculate SHA-1, SHA-256, SHA-384, and SHA-512 digests for pasted text or a local file.

Hash Comparison Toolcompare two digest strings using a timing-resistant-style full scan.

HMAC Generatorcalculate an HMAC with SHA-256, SHA-384, or SHA-512 using Web Crypto.

Password Strength Checkerestimate length, character variety, entropy, and common-pattern risks locally.

Passphrase Generatorgenerate a secure multi-word passphrase from a local word list.

Secure PIN Generatorgenerate cryptographically random numeric PIN values.

Secure Token Generatorgenerate a URL-safe token from cryptographically random bytes.

Password Entropy Calculatorestimate theoretical password entropy from length and observed character sets.

PBKDF2 Calculatorderive a hexadecimal key with PBKDF2 and Web Crypto.

HKDF Calculatorderive a hexadecimal key from input keying material using HKDF-SHA-256.

Random Bytes Generatorgenerate cryptographically random bytes as hexadecimal and Base64URL.

Secure Random Number Generatorgenerate an unbiased cryptographically random integer within an inclusive range.

PEM Decoder and Formatterdecode PEM armor, report block labels, and normalize line wrapping.

SSH Public Key Parserparse an OpenSSH public-key line and report type, payload length, and comment.

SSH Key Fingerprint Generatorcalculate an SHA-256 fingerprint for an OpenSSH public-key payload.

Permissions-Policy Generatorgenerate a restrictive Permissions-Policy header for common browser capabilities.

Security Headers Generatorgenerate a coherent baseline of modern browser security response headers.

Referrer-Policy Generatorselect and describe a standard Referrer-Policy header value.

HSTS Header Generatorgenerate a Strict-Transport-Security header with bounded max-age.

Cookie Security Checkerinspect a Set-Cookie value for Secure, HttpOnly, SameSite, and prefix guidance.

SameSite Cookie Generatorbuild a secure Set-Cookie value with explicit SameSite behavior.

Secret and Token Detectordetect common API key, bearer token, JWT, and private-key patterns in text.

Sensitive Data Redactorredact email addresses, IP addresses, bearer tokens, JWTs, and likely API keys.

Entropy and Randomness Analyzermeasure Shannon entropy, symbol diversity, and repeated-pattern indicators.

web

Web tools

Build and inspect URLs, HTTP values, SEO metadata, HTML, and CSS.

23 utilities · 90 converter pages

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URL Parserbreak an absolute URL into its useful components.

Slug Generatorcreate a clean lowercase URL slug from a title.

Unix Timestamp Convertertranslate Unix seconds, milliseconds, or dates into useful time values.

HTML Formatter & Beautifierformat HTML markup into a readable, consistently indented document.

Query String Parserparse repeated and encoded query parameters into a readable JSON structure.

URL Beautifierpresent a long absolute URL as a readable base address and one decoded query parameter per line.

URL Diffcompare URL components and query parameters side by side.

Set-Cookie Parserparse one Set-Cookie header into value and attribute fields.

HTTP Response Formatterformat a raw HTTP response into status, headers, and body sections.

iframe Generatorgenerate a sandboxed responsive iframe snippet for an HTTPS URL.

HTML Link Generatorgenerate an escaped accessible anchor element.

HTML Image Tag Generatorgenerate an escaped responsive image element with required alt text.

CSS Gradient Generatorgenerate linear, radial, or conic CSS gradients from selected colors.

CSS Box Shadow Generatorgenerate a configurable CSS box-shadow declaration.

CSS Border Radius Generatorgenerate shorthand and longhand border-radius declarations.

CSS Clamp Generatorgenerate a responsive clamp expression from minimum, preferred, and maximum values.

CSS Transform Generatorbuild a CSS transform from rotation, scale, and translation values with a visual preview.

CSS Flexbox Generatorgenerate a practical flexbox container declaration from alignment and spacing choices.

CSS Grid Generatorgenerate a responsive CSS Grid layout using a minimum column width and gap.

CSS Filter Generatorcombine blur, brightness, contrast, and saturation into one CSS filter declaration.

CSS Animation Generatorgenerate an accessible fade-and-slide keyframe animation with configurable timing.

Browser Information Detectorreport user agent, language, platform hint, cookies, online state, and viewport.

Browser Feature Detectorreport availability of selected modern browser APIs without requesting permissions.

color

Color tools

Convert colors, build palettes and gradients, and verify readable contrast.

8 utilities

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HEX to RGB Converterconvert a hexadecimal color into RGB and HSL values.

Color Contrast Checkermeasure WCAG contrast between foreground and background colors with AA and AAA guidance for normal and large text.

Modern Color Pickerchoose a color visually and report HEX, RGB, and HSL values.

Color Format Converterconvert HEX, RGB, or HSL input into common web color formats.

Color Palette Generatorgenerate complementary, analogous, triadic, tetradic, split, and monochromatic palettes.

Color Shade, Tint, and Tone Generatorgenerate lighter tints, darker shades, and muted tones from a base color.

Color Difference Calculatorcalculate sRGB distance and WCAG contrast between two colors.

CSS Variable Color Generatorgenerate semantic CSS custom properties from a color palette.

image

Image tools

Create, inspect, encode, and prepare browser-safe image assets.

6 utilities

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SVG Placeholder Image Generatorgenerate an accessible SVG placeholder with dimensions, colors, and label text.

SVG Pattern Generatorgenerate a seamless SVG dot or grid pattern.

Favicon SVG Generatorgenerate a compact letter-based SVG favicon using brand colors.

Image Aspect Ratio Calculatorreduce width and height to an exact aspect ratio and calculate resized dimensions.

Image File & Data URI Inspectorinspect a local image file or image data URI, including format, byte size, signature validity, and dimensions where supported.

Image Comparison and Pixel Diffcompare two browser-supported images with side-by-side previews, a threshold-controlled pixel heatmap, and difference statistics.

file

File tools

Inspect filenames, signatures, checksums, and file-oriented text safely.

12 utilities

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Local File Informationinspect a selected file’s name, extension, reported media type, byte size, and modified date without uploading it.

File Size Calculatorconvert a byte count into decimal and binary file-size units.

File & Text Checksum Generatorcalculate SHA-1, SHA-256, SHA-384, and SHA-512 checksums for a local file or supplied text.

Binary Hex and Text Viewerdisplay local file bytes or UTF-8 input as offsets, hexadecimal bytes, and printable ASCII.

Filename Sanitizerremove unsafe path characters, reserved names, and trailing dots from a filename.

Filename Case Converterconvert filename stems while preserving their extension.

Directory Tree Generatorturn one relative path per line into a readable directory tree.

File List Generatornormalize, deduplicate, and naturally sort one filename per line.

Sensitive Text Redactorredact common email, IP, bearer-token, JWT, and API-key patterns before sharing text.

Universal File Comparisondetect and compare compatible text, code, table, spreadsheet, and image files in one private workspace.

Spreadsheet and Excel Comparisoncompare XLSX workbooks, individual worksheets, CSV files, or TSV files down to changed cells, formulas, and formats.

Folder and Directory Comparisoncompare two local folder inventories recursively by relative path, size, and modification timestamp.

SEO

SEO tools

Audit metadata, structured data, crawl directives, and content signals locally.

24 utilities

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robots.txt Beautifiernormalize robots.txt groups, directive spacing, comments, and sitemap lines without changing directive order.

robots.txt Generatorgenerate a robots.txt policy with crawl rules and a sitemap location.

sitemap.xml Generatorgenerate valid XML sitemap entries from one absolute URL per line.

Meta Tag Generatorbuild a complete, reviewable set of title, description, canonical, robots, language, author, keyword, and social content-type tags.

Open Graph and Twitter Card Generatorgenerate social-sharing meta tags from page content and an image URL.

Canonical URL Generatorcreate a reviewable canonical link from an absolute HTTP or HTTPS URL, with explicit controls for tracking parameters, query strings, and trailing slashes.

JSON-LD Generatorgenerate valid Organization, Article, FAQ, or BreadcrumbList JSON-LD.

SERP Snippet Previewsimulate a desktop or mobile organic search snippet and review title and description length using transparent approximate width guidance.

Meta Tag Analyzerinspect pasted HTML for title, description, canonical, robots, viewport, and social metadata.

Title and Meta Description Checkermeasure title and description characters with approximate search-snippet width guidance.

Duplicate Meta Detectorfind repeated titles and descriptions in pasted page records.

Heading Structure Analyzerextract H1 through H6 from pasted HTML and flag skipped levels or multiple H1 elements.

Keyword-in-Title Checkercheck whether a target phrase appears in a title and report its placement.

Content-to-Code Ratio Calculatorcompare visible text length with pasted HTML source length as a transparent heuristic.

Schema Markup Validatorvalidate JSON-LD syntax and check basic @context and @type structure without claiming rich-result approval.

robots.txt Syntax Validatorvalidate common robots.txt fields, user-agent grouping, sitemap URLs, and line syntax locally.

hreflang Tag Generatorgenerate reciprocal HTML link elements from locale and absolute URL pairs.

hreflang Validatorvalidate pasted locale and URL pairs for duplicate languages and malformed absolute URLs.

Duplicate Content Similarity Checkercompare two text blocks with complementary lexical and phrase-overlap metrics, readable findings, and a clearly labelled heuristic assessment.

Passive Voice Detectorhighlight likely English passive-voice phrases using a transparent pattern-based heuristic.

Canonical Conflict Detectorinspect pasted HTML for multiple, relative, malformed, or conflicting canonical declarations.

Broken Link Syntax Checkerinspect pasted HTML anchors for missing, empty, fragment-only, unsafe, or malformed href values.

llms.txt Generatorgenerate a concise llms.txt-style Markdown index from a site name, summary, and page list.

llms.txt Validatorvalidate an llms.txt-style Markdown document for a title, summary, and absolute resource links.

123

Calculators

Calculate business, finance, web, date, and everyday values with documented formulas.

20 utilities

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ROI Calculatorcalculate return on investment from cost and resulting value.

Break-Even Calculatorcalculate break-even units and revenue from fixed cost, unit price, and variable cost.

Profit Margin and Markup Calculatorcalculate gross profit, margin, and markup from cost and selling price.

Discount Calculatorcalculate discount amount, final price, and effective savings percentage.

GST, VAT, and Sales Tax Calculatorcalculate tax-exclusive or tax-inclusive monetary totals using an explicit jurisdiction rate.

Loan / EMI Calculatorcalculate a fixed monthly loan payment, total repayment, and total interest.

Compound Interest Calculatorcalculate future value with configurable compounding frequency and time.

Simple Interest Calculatorcalculate simple interest and final amount from principal, rate, and time.

ROAS Calculatorcalculate return on ad spend from attributed revenue and advertising cost.

Customer Acquisition Cost Calculatorcalculate CAC from acquisition spending and newly acquired customers.

Customer Lifetime Value Calculatorestimate simple customer lifetime value from average order value, frequency, margin, and lifespan.

Page Weight to Load Time Estimatorestimate ideal transfer time from page size and connection throughput.

Bandwidth and Data Usage Calculatorestimate transferred data from payload size, requests, and time period.

Uptime to Downtime Calculatortranslate an uptime percentage into allowed downtime per month and year.

Cron Runs per Month Calculatorestimate monthly execution count for common five-field cron intervals.

Percentage Calculatorcalculate a percentage of a value, percentage change, or what percent one value is of another.

Tip Calculatorcalculate a tip and per-person total from bill amount, rate, and party size.

BMI Calculatorcalculate adult body mass index from metric height and weight with standard category labels.

Age Calculatorcalculate completed years, months, and days between a birth date and comparison date.

Date Difference Calculatorcalculate signed calendar days and absolute elapsed time between two ISO dates.

AI utilities

Estimate tokens, inspect prompts, prepare datasets, and generate model-neutral AI formats.

15 utilities

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AI Token Counter (Approximation)estimate tokens from Unicode text using transparent character and word heuristics.

Prompt Length Analyzermeasure prompt characters, words, lines, approximate tokens, and context usage.

Prompt Injection Pattern Scannerflag common instruction-override, secret-extraction, and role-confusion phrases using local heuristics.

Prompt Diff and Version Comparercompare two prompt versions line by line without sending their contents anywhere.

Prompt Format Converterconvert role-based message JSON into ChatML, Llama 3, Alpaca, Vicuna, or Mistral text templates.

Few-Shot Example Formatterformat JSON input/output examples into consistent labelled prompt demonstrations.

System vs User Message Splittersplit a labelled prompt into structured system and user message JSON.

Prompt to SDK Code Generatorgenerate syntactically valid Fetch, Python requests, or cURL templates with explicit placeholders.

Structured Output Schema Generatorgenerate JSON Schema, Pydantic, or Zod structure from a representative JSON object.

Fine-Tune JSONL Dataset Validatorvalidate generic chat-message JSONL structure, roles, content, and duplicate records.

Conversation JSON to Markdownconvert a role/content conversation JSON array into readable Markdown.

Prompt / Response Pair Deduplicatorremove exact duplicate prompt-response JSONL records while preserving first occurrence order.

Context Window Fit Calculatorestimate whether prompt, response reserve, and overhead fit within a chosen context window.

RAG Chunk Size and Overlap Calculatorestimate chunk count and duplicated tokens from document length, chunk size, and overlap.

Vector Index Storage Calculatorestimate raw embedding-vector storage from vector count, dimensions, and numeric precision.