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Base64 Encode / Decode

Encode and decode Base64

Convert text to Base64 or decode Base64 strings back to readable text instantly.

Waiting for inputCharacters: 43Lines: 1Bytes: 43

Output will appear here.

What this tool does

Base64 Encode / Decode converts Unicode text to Base64 and decodes Base64 strings back into readable text.

Privacy note

Your input is processed locally in your browser and is not uploaded to a server.

Common use cases

  • Encode text for API testing.
  • Decode Base64 values found in configuration files.
  • Inspect encoded fragments in tokens or payloads.
  • Convert text with Unicode characters without losing information.

FAQ

Does this tool support Unicode?

Yes. It uses TextEncoder and TextDecoder to handle Unicode text correctly.

Is my text uploaded to a server?

No. Encoding and decoding happen locally in your browser.

What happens if I decode invalid Base64?

The tool shows an error and does not produce decoded output.

Can I reuse the output as input?

Yes. The Use output as input button lets you chain conversions quickly.