Shrink File Size Online
Reduce Any File's Size With GZIP
Need to use Shrink File Size Online right now?
Text-heavy files like logs and source code compress especially well.
Drop any file to compress
Processed locally in your browser — never uploaded
Works on any file type using your browser's native GZIP compression — no library, no upload. How much it shrinks depends entirely on the file's content (already-compressed files like JPGs or MP4s won't shrink much further).
Features
- Runs entirely in your browser
- Privacy-first — your data is never uploaded
- Real-time, instant results
- 100% free, no sign-up required
- Works on desktop, tablet, and mobile
- No installation needed
Who uses this tool?
About Shrink File Size Online
Sometimes you just need to shrink a single file — a large text file, a log, a data export — without the overhead of a full archive tool. This works on any file type using your browser's own built-in GZIP compression, with zero external library needed for the compression itself.
Modern browsers include a native CompressionStream API supporting GZIP directly — this tool pipes your uploaded file through that stream, producing a standard .gz file that any GZIP-compatible tool can decompress, including this site's own GZIP Extractor.
How much a file shrinks depends entirely on its content: text-heavy files (logs, CSVs, plain documents) typically compress significantly, while already-compressed formats (JPG, MP4, PNG, ZIP) barely shrink further at all, since there's little redundancy left for GZIP to exploit.
Everything happens locally in your browser using a native web platform API — no upload, no external library, and the compressed result is ready to download immediately.
How it works
- Upload any file. Works on any file type.
- Compression runs natively. Your browser's built-in GZIP API handles it.
- Download the compressed file. A standard .gz file, ready to share or store.
Examples
Shrinking a large log file
Input
50MB text log
Output
a much smaller .gz file