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25+ free, browser-based tools — PDF, image, developer, calculator & more. No sign-up, no upload to server. Your data never leaves your device.
6 tools available in Developer Tools
JSON Formatter
Format, beautify, and validate JSON data online. A fast, free, no-upload tool for developers.
JWT Decoder
Decode JSON Web Tokens (JWT) safely in your browser. Verify claims and header data instantly.
Regex Tester
Test and debug your Regular Expressions instantly with real-time matching and syntax highlighting.
CSS Gradient Generator
Create beautiful linear and radial CSS gradients and instantly copy the CSS code.
Schema Generator
Generate rich snippets and JSON-LD structured data to boost your website's SEO performance.
Base64 Encoder/Decoder
Easily encode text or files to Base64 format, or decode Base64 back to text strings locally.
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Every tool on this page runs entirely in your browser. No files are uploaded to any server. No data is stored. No accounts needed.