JSON LAB / BROWSER TOOLS
Base64 Encoder/Decoder
Encode and decode Base64 strings quickly for debugging and development.
What you can do
- Encode/decode instantly.
- Client-side processing.
- Useful for headers and payloads.
- Copy-friendly output.
Questions, answered
Why does decoding fail?
Input must be valid Base64. Check padding and avoid URL-safe variants unless handled.
Does it support UTF-8?
Browser Base64 helpers may be limited for non-ASCII. Prefer UTF-8 safe helpers when needed.