Free online ZIP Archive to GZIP Archive converter. Files are processed locally in your browser — no uploads, 100% private.
Drop your .ZIP file here
or click to browse from your device
100% browser-based — no server uploads, no cloud processing
Free forever — no account or subscription required
Supports batch conversion for multiple files at once
Works on any device — desktop, tablet, and mobile
Results available in seconds — no server queue or wait time
Files are cleared immediately after processing for maximum privacy
Standard compressed archive format
GNU zip compressed file
Source: Standard compressed archive format
Output: GNU zip compressed file
100% browser-based processing — files never leave your device
Free with no file limits, watermarks, or registration required
No encryption in basic ZIP (use 7-Zip AES for security)
Compression ineffective for already-compressed files
Less efficient compression than 7-Zip or RAR for large archives
Sharing multiple files as a single download
Website deployment and software release packages
File backup and offline archives
Cross-platform file bundle transfer
Use 7-Zip with .7z format for the highest compression ratio
Use ZIP for maximum cross-platform compatibility without extra software
Include a README.txt inside archives to explain the contents to recipients
Test archives by extracting a test copy before deleting originals
Drag & drop your file or click to browse
Files are processed instantly in your browser
Save your converted or processed file
Upload your ZIP file using the drop zone above. Your file is instantly converted to GZ format right in your browser — no server upload, no waiting.
Completely. Our converter processes your ZIP file 100% in your browser using client-side code. It never leaves your device or touches any external server.
It depends on the formats. Converting from lossless to lossy (e.g. PNG to JPEG) may reduce quality. Converting lossless-to-lossless (e.g. PNG to WebP lossless) preserves all quality.
Free, instant, and 100% private. Your files are processed locally in your browser.