TIPS
- Encode and decode once to verify the round trip.
- Decide whether you are working with plain text or file content first.
About Base64URL Converter
Base64URL Converter is a free online tool for checking Base64URL strings used in JWTs and signed URLs directly in the browser.
- No installation required. It runs directly in the browser.
- Built for quick checks during development, operations, and lightweight data cleanup.
- Includes a copy-friendly output area to shorten repetitive work.
FAQ
How is it different from regular Base64?
Base64URL replaces + and / with - and _ so the string is URL-safe.
Can I inspect parts of a JWT?
Yes. It is useful for decoding JWT header or payload segments.