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Format, encode, hash and test - 34 working tools
JSON Formatter
Beautify and indent JSON so it is easy to read.
JSON Validator
Check whether JSON is valid and see where an error is.
JSON Minifier
Remove whitespace from JSON to make it smaller.
XML Formatter
Validate and pretty-print XML documents.
HTML Formatter
Indent and tidy HTML markup.
CSS Minifier
Strip comments and whitespace from CSS.
JavaScript Minifier
Compress and mangle JavaScript with Terser (runs locally).
Base64 Encode / Decode
Encode or decode Base64 with full UTF-8 (Urdu, emoji) support.
URL Encode / Decode
Percent-encode or decode URLs and query strings.
UUID Generator
Generate random UUIDs (v4) or time-ordered UUIDs (v7).
Hash Generator
Create SHA-256, SHA-512, SHA-1 and MD5 hashes of text or files.
Regex Tester
Test regular expressions with live match highlighting and groups.
JWT Decoder
Decode a JSON Web Token's header and payload (does not verify the signature).
Unix Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps.
Color Converter
Convert colors between HEX, RGB, HSL, HSV and CMYK.
Meta Tag Generator
Generate SEO, Open Graph and Twitter Card meta tags.
YAML Formatter
Validate, re-indent and sort YAML (multi-document supported), or convert it to JSON. Comments are not kept.
SQL Formatter
Pretty-print SQL with indentation and keyword case for 20+ dialects (MySQL, PostgreSQL, SQL Server, BigQuery, SQLite...).
SQL Minifier
Remove comments and extra whitespace from SQL. Quoted strings and identifiers are left untouched.
JSON Diff
Compare two JSON documents and list every added, removed and changed value by path. Key order is ignored. Can export an RFC 6902 JSON Patch.
JSONPath Tester
Run JSONPath expressions (filters, wildcards, recursive descent) against your JSON and see matching values and their paths.
JSON Schema Validator
Validate JSON data against a JSON Schema (draft 2020-12 / 07 keywords) and see each error with its path. Runs without eval; only local $ref is supported.
CSS Formatter
Beautify minified or messy CSS: one declaration per line, consistent indentation, selectors split by comma. Handles @media, @keyframes and nesting.
JavaScript Beautifier
Re-indent and format minified or messy JavaScript. Pure formatting - it never changes your code. Plain modern JS (no JSX/TypeScript).
HTML Minifier
Shrink HTML by removing comments and extra whitespace, optionally minifying inline CSS and JavaScript. <pre>, <textarea>, <script> and <style> content stays intact.
Markdown Editor
Write Markdown with a live preview. Raw HTML is passed through an allow-list sanitizer, so scripts, event handlers and javascript: links never make it into the output. Export .md or .html.
Markdown Table Generator
Build a Markdown (GFM) table in an editable grid, set column alignment, or paste CSV/TSV to convert. Pipes and line breaks are escaped for you.
Cron Expression Parser
Explain a cron expression in plain English and list its next run times (local time or UTC). Supports 5 or 6 fields, names, steps, @macros and L / # extras.
Cron Expression Builder
Build a cron expression with point-and-click fields, with a plain-English summary and the next run times.
Base64 Image Viewer
Paste a Base64 string or data:image URI and see the picture, its real format, dimensions and size. Download it as a file.
JWT Signature Verifier
Check that a JSON Web Token's signature is valid using your secret (HS256/384/512) or public key / certificate / JWK (RS, PS, ES, EdDSA), and see its claims and expiry. Nothing is sent anywhere.
URL Query String Builder
Build or edit the query string of a URL with key/value rows. Values are percent-encoded correctly; existing parameters are parsed into rows.
File Hash Checker
Compute the MD5, SHA-1, SHA-256, SHA-384 and SHA-512 checksums of any file and compare them with the hash published by the download page. The file never leaves your device.
SRI Hash Generator
Generate Subresource Integrity (integrity="sha384-...") attributes and ready-to-paste <script> / <link> tags from a file or pasted code. Nothing is downloaded.