Free Base64, JWT, and JSON Validator
Encode/decode and validate text safely in your browser.
No uploads. No servers. No account required.
100% Private - Input Never Leaves Your Device
Base64 operations, JSON checks, and JWT decoding all run locally in your browser.
Base64 Encoder / Decoder
JSON Validator
JWT Decoder
Header
Payload
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How to Use
- Choose Base64, JWT, or JSON section depending on task.
- Paste your input and run validate/decode/format actions.
- Copy cleaned outputs for downstream use.
Example: Validate API JSON response and inspect JWT claims quickly. See full use case.
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