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Base64url Encoder / Decoder

Convert UTF-8 text and URL-safe Base64. Encoding omits padding; decoding validates alphabet, padding and UTF-8.

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Convert UTF-8 text and URL-safe Base64. Encoding omits padding; decoding validates alphabet, padding and UTF-8.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Convert UTF-8 text and URL-safe Base64. Encoding omits padding; decoding validates alphabet, padding and UTF-8.
  2. Choose the options, then run the tool.
  3. Check the result, then copy or download it.

Example

Hello → SGVsbG8

Details and limitations

Convert UTF-8 text and URL-safe Base64. Encoding omits padding; decoding validates alphabet, padding and UTF-8.

Processing stays in your browser.

FAQ

Supported inputs and limits

Convert UTF-8 text and URL-safe Base64. Encoding omits padding; decoding validates alphabet, padding and UTF-8.

Format references

Tool page updated: