Encoding
Base64 Decode
Paste Base64 text and decode it locally, with validation for malformed input and Unicode-safe output.
Runs locally in your browser. Your input is not uploaded. Base64 is encoding, not encryption.
How this tool works
Base64 decoding converts text-safe encoded bytes back into readable text when the bytes represent valid Unicode.
Malformed input is reported so you can fix padding or invalid characters.
Examples
- Decode a sample API value.
- Inspect the text inside a Base64-encoded configuration string.
Common use cases
Payload inspection
Config debugging
Encoding checks
FAQ
What happens with invalid Base64?
The tool shows an error instead of returning partial or misleading output.
Can Base64 contain secrets?
Yes. Treat decoded values carefully because Base64 is not encryption.