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LZUTF-8 Compressor

Compression · Free Online Tool

LZUTF-8 compress/decompress optimized for UTF-8 text.

By EZ4Code Team

Implementation note：Educational implementation. This is a compact, readable version intended to illustrate how the algorithm works. Its output is not byte-compatible with standard implementations, so do not use it to compress or decompress real data.

This tool uses a browser-native deflate-based engine as an LZUTF-8-compatible stand-in. For the original LZUTF-8 byte format, install the lzutf-8 package.
211 chars
0 chars
Click "Compress" to run...

UTF-8 Aware

Optimized for Unicode text — handles multi-byte characters cleanly.

Binary + Base64

Output is base64-encoded so it survives copy/paste and JSON round-trips.

Live Ratio

See the input/output byte counts and compression ratio instantly.

How to Use LZUTF-8 Compressor

  1. 1Enter or paste the text you want to compress.
  2. 2Select the compression algorithm (gzip, deflate, or brotli).
  3. 3Click compress to reduce the data size.
  4. 4Copy or download the compressed output.

Features

  • ✓100% free — no signup, no subscription, no ads
  • ✓Runs entirely in your browser — data never leaves your device
  • ✓Fast and lightweight — instant results
  • ✓Cross-platform — works on desktop, tablet, and mobile

Frequently Asked Questions

What compression algorithms are supported?

We support gzip, deflate, and brotli compression algorithms for text data.

Is there a file size limit?

Since tools run in your browser, the limit depends on your device memory. Most tools handle several megabytes without issues.

Can I decompress data produced by other software?

Yes. The decompression tools accept standard gzip, deflate, and brotli streams from any compliant source — command-line tools, web servers, or other libraries.

Why does the compressed output look unreadable?

Compressed data is binary, not text. Use Copy as Base64 or download it as a file — pasting raw compressed bytes into a text field will show garbled characters.

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