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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.

Result

Add your input or load an example, then run the tool. Your result will appear here.

How to use

  1. Choose the options, then run the tool.
  2. Check the result, then copy or download it.

Example

Hello → SGVsbG8

Details and limitations

Processing stays in your browser.

Format references

Tool page updated: