Compress ZIP files online for free. Shrink archive size without losing quality. Best ZIP compressor tool with fast processing.
Losslessly shrink PNG files.
Compression Level
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Drop a png compressor file here or click to browse
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Reduce ZIP file size instantly online – free tool for archiving and sharing.
ZIP files are everywhere, but they can still be too large for email or cloud storage. Our ZIP Compressor re-optimizes existing ZIP archives, reducing size by up to 40% without changing the original content.
We apply advanced algorithms like Deflate64 and LZMA to re-compress the data inside your ZIP. Redundant patterns are removed, and files are repacked more efficiently.
| Algorithm | Compression Ratio | Speed |
|---|---|---|
| Deflate (original) | 60% | Very Fast |
| Deflate64 | 65% | Fast |
| BZIP2 | 70% | Medium |
| LZMA | 75% | Slow |
Ideal for developers, designers, students, and businesses who need to shrink ZIP files for email attachments, website uploads, or archival storage.
See the FAQ section above for detailed answers. In short – it's safe, fast, and completely online.
Everything you need to know about this tool