Zero data persistence — everything runs in your browser tab.

Format, validate and minify JSON with error line highlighting.

Convert JSON documents to XML.

Convert JSON to YAML.

Flatten JSON arrays into CSV.

Render JSON as an HTML table.

Structural diff between two JSON documents.

Evaluate JSONPath expressions against a document.

Collapsible tree view for large JSON.

URL-encode and decode JSON payloads.

Validate a document against a JSON Schema.

Convert text or files to Base64 and back — Unicode-safe.

Percent-encode and decode URL components.

Escape and unescape HTML entities.

Turn an image into a data: URI and back.

Inspect and convert UTF-8 byte sequences.

URL-encode and decode XML payloads.

Decode hex byte strings to text.

RFC 4648 Base32 conversion.

Base58 conversion (Bitcoin alphabet).

Inspect header, payload and expiry of a JSON Web Token — never sent to a server.

Pretty-print or minify XML.

Convert XML documents to JSON.

Check XML for well-formedness.

Compare two XML documents.

Collapsible tree view for XML.

Evaluate XPath expressions against a document.

Format and validate YAML.

Convert YAML to JSON.

Convert YAML to XML.

Collapsible tree view for YAML.

Pretty-print CSS.

Compress CSS in your browser — no server round-trip.

Convert plain CSS to nested SCSS.

Convert plain CSS to LESS.

Lint CSS for syntax errors.

Compile SCSS to CSS with Dart Sass.

Pretty-print JavaScript.

Minify JavaScript.

Check JavaScript for syntax errors.

Format JSX / TSX.

Format TypeScript.

Pretty-print GraphQL documents.

MD5, SHA-1, SHA-256 and SHA-512 digests from text or files — entirely in-browser.

HMAC-SHA256 signatures via Web Crypto.

SHA3-224/256/384/512 digests.

Cyclic redundancy checksums.

Symmetric encryption via Web Crypto.

Convert between binary, octal, decimal and hex.

Decode binary, hex or ASCII codes to text.

Byte-swap a hex string.

Convert delimited data to JSON.

Convert delimited data to XML.

Generate INSERT statements from CSV.

Render CSV as an HTML table.

Sortable table view for CSV.

Bulk-generate RFC 9562 UUIDs (v4 and v7).

Generate mock JSON from a shape.

Generate random strings and tokens.

Cryptographically strong random numbers.

Generate random MAC addresses.

Generate random IPv4 / IPv6 addresses.

Strip tags to plain text.

Build an HTML table from rows and columns.

Escape and unescape HTML.

Break a URL into its components and query params.

Real-time regex debugger with match highlighting and capture groups.

Human-readable descriptions and the next 5 run times for a cron expression.

IPv4 / IPv6 conversions and CIDR maths.

AND, OR, XOR, shifts on integers.

Inflate gzip / zlib payloads in-browser.