Developer Tools

View, format, validate, edit and beautify JSON with an interactive tree view, plus a shareable link.

View, format, validate, edit and beautify JSON with an interactive tree view, plus a shareable link.

Validate JSON syntax and pinpoint errors instantly.

Decode JWT headers and payloads, and verify HMAC signatures with a secret.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes, in hex or Base64, with a compare mode.

Test regular expressions against sample text, with live matches, a replace mode, and Python/PCRE syntax support.

View, format, validate, edit and beautify JSON with an interactive tree view, plus a shareable link.

Validate JSON syntax and pinpoint errors instantly.

Strip whitespace to compress JSON to its smallest size.

Decode JWT headers and payloads, and verify HMAC signatures with a secret.

Encode text to standard or URL-safe Base64.

Decode Base64 strings back to text, images or files — including JWTs and data URIs.

Percent-encode text for safe use in URLs, with a component vs. full-URL mode.

Decode percent-encoded URLs back to plain text — automatically unwraps multiple layers.

Generate random UUID v4 or time-ordered UUID v7 identifiers in bulk.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes, in hex or Base64, with a compare mode.

Test regular expressions against sample text, with live matches, a replace mode, and Python/PCRE syntax support.

Convert between Unix timestamps and human-readable dates.

Format and indent SQL queries for readability.

Strip comments and collapse whitespace to compress SQL.

Format and indent HTML markup for readability.

Compress HTML by stripping comments and whitespace.

Convert colors between HEX, RGB, HSL and OKLCH.

Format and beautify JavaScript code, with configurable indent and brace style.

Check JavaScript syntax and pinpoint the exact error.

Compress JavaScript with real minification, not just whitespace removal.

Format and beautify CSS stylesheets.

Check CSS syntax and pinpoint the exact error.

Compress CSS by removing dead rules, comments and whitespace.

Format and indent XML documents for readability.

Check that XML is well-formed and pinpoint the error.

Strip comments and insignificant whitespace to compress XML.

Normalize Markdown heading/list spacing and align table columns.

Compare two JSON documents and highlight the differences.

Generate TypeScript interfaces or Zod schemas from a JSON sample.

Generate a JSON Schema from a sample JSON document, with a toggle for the required-fields default.

Escape text into a JSON string literal, or unescape it back — with an optional \uXXXX-only mode.

Convert text to and from Unicode escapes — JavaScript, Python, CSS, HTML entities, UTF-8/16.

Convert numbers between binary, octal, decimal, hexadecimal, or any custom base 2–36.

Encode any file to a Base64 string or data URI.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes of a file, with automatic checksum comparison.

Create and sign a JWT with an HMAC secret — HS256, HS384 or HS512.

Search and look up the meaning of any of the 60+ standard HTTP status codes.

Parse and explain raw HTTP response headers.

Generate a fluid clamp() value for font-size, padding, gap and more.

Convert JSON to YAML format.

Convert YAML to JSON — including anchors, merge keys and multi-document files.

Check YAML syntax and pinpoint the exact error.

Convert JSON to XML format.

Convert XML to JSON format.

Escape or unescape a string for JavaScript/JSON, SQL or CSV.