All tools / Developer tools
Free developer tools online
Less debugging. More building. Your data stays on your device.
JSON formatter
Beautify JSON, minify data, and explore a collapsible tree with syntax highlighting. Validate and copy JSON entirely in your browser.
Syntax highlightingOpen tool
Base64 encoder
Encode and decode Base64 text with UTF-8 support, convert binary files, and download decoded bytes. Everything runs in your browser.
Unicode supportOpen tool
Regex tester
Test JavaScript regular expressions with live highlighting, flags, capture groups, and syntax validation in a protected browser worker.
Live match highlightingOpen tool
How to Use
- Pick a tool from the cards above.
- Provide your inputs and adjust the settings.
- Review the result and download or copy it.
Frequently Asked Questions
Are these tools free and private?
Yes. All computations run in your browser without uploading your files. Practical file sizes depend on your device memory.