Converter
LiveDev tools that never see your data.
Converter is a set of fast, privacy-first developer tools for the everyday encode, decode, and validate tasks. Everything runs in your browser, so the data you paste never touches a server.
What Converter does
Converter bundles the small utilities developers reach for all day: Base64 encode and decode, URL encoding, JWT inspection, and JSON formatting and validation. Each tool is a single focused page that does one job and does it instantly.
Because every conversion happens locally in your browser, you can paste tokens, payloads, and secrets without sending them anywhere.
Who it is for
Developers, and anyone who works with APIs and data formats. If you have ever pasted a JWT into a random website to decode it and then felt uneasy about it, this is built for you.
Why in-browser matters
Most online converters quietly send your input to a server to process it. Converter does the work on your own machine, so sensitive data like access tokens and config never leaves the page. No accounts, no logging, no upload.
Highlights
Base64
Encode and decode Base64 in either direction.
URL encoding
Escape and unescape URL components cleanly.
JWT inspector
Decode and read JWT headers and payloads.
JSON tools
Format, minify, and validate JSON in a click.
Frequently asked
- Does my data get sent to a server?
- No. Every conversion runs entirely in your browser, so the text you paste never leaves your machine.
- Is it free to use?
- Yes. The tools are free and require no account.
Try Converter
Dev tools that never see your data.