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GZIP Text Compressor

Compress UTF-8 text to Base64-encoded GZIP or decompress it back to text.

Convert in your browser · No sign-up

Requires CompressionStream support. Input is limited to 100000 characters and decompressed output to 1 MB. Invalid UTF-8 is rejected.

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. Compress UTF-8 text to Base64-encoded GZIP or decompress it back to text.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

UTF-8 text ⇄ GZIP bytes encoded as Base64

Details and limitations

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: