DevUtil
Free, fast, and privacy-friendly developer tools that run entirely in your browser. No data ever leaves your machine.
JSON Tools
Format, validate, minify, diff, and explore JSON data.
Data Converters
Convert between JSON, YAML, XML, CSV, and TypeScript.
Encoders & Decoders
Decode JWTs, encode Base64, hash text, and convert timestamps.
Text & List Tools
Preview Markdown, generate placeholder text, and compare or deduplicate lists.
Dev Tools
Test regex patterns, generate UUIDs, and convert colours.
Schema Tools
Generate JSON-LD structured data for Google with live preview.
100% Client-Side
All processing happens in your browser - we don't store it on our server.