Developer Utility
Base64 Decode Tool
Decode Base64 strings into readable text.
Language: Base64Utility: Decode
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What This Tool Does
Decode Base64 payloads when inspecting tokens, headers, or encoded API fields.
Use it to inspect or transform input quickly, then carry validated output into code, tests, or API requests.
Common Use Cases
- Read encoded metadata in webhook payloads.
- Inspect JWT header and payload segments.
- Verify transformed text before downstream parsing.
Common Pitfalls
- Invalid alphabet characters break decoding.
- Decoded bytes may not be UTF-8 text.
FAQ
Can I decode JWT parts here?
Yes, JWT segments are Base64URL-compatible text.
What if output looks garbled?
The decoded bytes may represent binary data.
Does this tool send data to a backend?
Most tools process input client-side in your browser unless explicitly noted.