ZIP to GZ Converter
Convert ZIP archives to GZ in your browser. GZ is ideal when you need compressing a payload or tar stream for transfer, while ZIP is better known for universal support for bundling and sharing folders.
- Files never uploaded
- Instant, on-device
- Free & no sign-up
Drop ZIP files here, or browse
ZIPGZ · files stay on your device
up to 100 MB per file · up to 20 files per batch
How to convert ZIP to GZ
- Step 01
Add your ZIP file
Drop one or many ZIP files onto the converter, or browse from disk. Stay within the on-device size limits shown under the drop zone — oversized files are rejected so your tab does not freeze.
- Step 02
Repack locally
Extract and rebuild the archive as GZ in your browser. Folder trees stay on this device throughout the conversion.
- Step 03
Download GZ
Download your new GZ file immediately. Multiple outputs pack into a single ZIP archive.
Why convert ZIP to GZ
ZIP is a compressed archive known for universal support for bundling and sharing folders. GZ is preferred when compressing a payload or tar stream for transfer. This ZIP to GZ converter unpacks and repacks entirely in your browser, so installers, backups, and shared folders never upload to a remote archive service.
When to use this tool
- A tool, form, or teammate asked for GZ, but you only have ZIP.
- You are optimizing for compressing a payload or tar stream for transfer instead of staying in ZIP.
- Recipients or tools unpack GZ more reliably than ZIP, or you need a different compression trade-off.
Good to know
- Output characteristics follow GZ: fast, widely supported single-stream compression.
- Source quirks still apply — ZIP is limited by weaker compression than 7z on some payloads, and conversion cannot invent missing data.
- Password-protected or damaged archives may fail to open; encryption is not re-applied on output unless the format requires it.
- Browser limit: about 100 MB compressed, up to 20 files per batch, and roughly 500 MB / 500 entries once extracted.
- Need a bigger file? For multi‑GB archives, use 7-Zip, WinRAR, PeaZip, or your OS archive utility — they stream to disk instead of holding everything in a browser tab.
File size limits for ZIP to GZ
Browser limit: about 100 MB compressed, up to 20 files per batch, and roughly 500 MB / 500 entries once extracted.
Why there is a limit
Archives are fully extracted into memory before repacking. Zip bombs and huge ISO/RAR payloads can crash the tab, so compressed and uncompressed caps keep the process safe on-device.
If your file is too large
For multi‑GB archives, use 7-Zip, WinRAR, PeaZip, or your OS archive utility — they stream to disk instead of holding everything in a browser tab.
ZIP to GZ FAQ
Common questions about converting ZIP files to GZ.
Is this ZIP to GZ converter free?
Yes. Browser Convert does not charge for ZIP → GZ, add watermarks, or require an account.
Are folder paths preserved from ZIP to GZ?
Yes when both formats support nested paths. Empty directories and exotic permission bits may be omitted.
Can I convert password-protected ZIP archives?
Encrypted archives need to be unlocked first. Browser Convert does not upload the file, but it also cannot guess a missing password.
Is ZIP to GZ conversion private on Browser Convert?
Yes. Your ZIP archive is processed in the browser. We do not upload the file to convert it, which is the main difference from typical online converters.
Are there file size limits for ZIP to GZ?
Yes. Browser Convert accepts about 100 MB per file, with up to 20 files queued at once. Archives are fully extracted into memory before repacking. Zip bombs and huge ISO/RAR payloads can crash the tab, so compressed and uncompressed caps keep the process safe on-device. If your file is larger, For multi‑GB archives, use 7-Zip, WinRAR, PeaZip, or your OS archive utility — they stream to disk instead of holding everything in a browser tab.
Can I convert several ZIP files to GZ at once?
Yes. Queue up to 20 ZIP files and convert them in one pass. When finished, download the batch as a ZIP. Very large batches may need to be split so your browser stays responsive.