DevUtil
Free, fast, and privacy-friendly developer tools. Most tools run entirely in your browser. A few use a lightweight server proxy but never store your data.
JSON Tools
Format, validate, minify, diff, and explore JSON data.
Image Tools
Compress, resize, and optimise images, convert to Base64, and generate QR codes.
Encoders & Decoders
Decode JWTs, encode Base64, hash text, and convert timestamps.
Text & List Tools
Preview and convert Markdown, count words, convert case, diff text, and manage lists.
Data Converters
Convert between JSON, YAML, XML, CSV, and TypeScript.
Dev Tools
Test regex, generate UUIDs and passwords, format CSS and HTML, convert colours and timestamps, and more.
Meta Tools
Generate favicons, meta tags, OG images, and robots.txt files.
Detect Tools
Inspect HTTP headers, trace redirects, and detect website technologies.
Schema Tools
Generate JSON-LD structured data for Google with live preview.