Category
Developer Tools
Free developer tools that run in your browser: JSON formatter and validator, Base64 encoder / decoder and a live Markdown previewer.
Small, fast utilities for everyday development work, built to stay out of your way.
Each tool does one job well: paste your input, see the result, copy it. Coming soon: a JSON formatter and validator that points to the exact error, a UTF-8-safe Base64 encoder and decoder, and a Markdown previewer with copy-as-HTML.
Your data never leaves the page: everything is processed locally in your browser, so you can paste API responses or config files without sending them to a server. No sign-up, no limits and nothing to install.
JSON Formatter & Validator
Format, minify and validate JSON, showing where errors are.
Base64 Encoder / Decoder
Encode and decode text to and from Base64 (UTF-8 safe).
Markdown Previewer
Live preview of Markdown, with copy-as-HTML.