ZIP to 7Z converter
Convert ZIP files to 7Z with TLS uploads and automatic deletion. Open archive format with very high compression ratios.
Drop a ZIP file, or click to browse
Converts to 7Z · runs live, right now
How it works
Drop your file
Drag a ZIP file in, or click to browse. No account needed to try it.
We convert it
Secure upload, converted to 7Z in our archive pipeline.
Download the result
Grab your 7Z file immediately, or find it later in your dashboard.
Why convert ZIP to 7Z?
Both ZIP and 7Z use lossless compression, so the conversion mainly changes compatibility, not quality. The main reason to convert ZIP to 7Z is compatibility: 7Z extracts with the archive tool already built into your OS, while ZIP doesn't always. If you're sharing a file with someone else, sending it to a tool that expects a specific format, or archiving it for the long term, 7Z is usually the safer target.
Format comparison
| ZIP | 7Z | |
|---|---|---|
| Extension | .zip | .7z |
| MIME type | application/zip | application/x-7z-compressed |
| Compression | lossless compression | lossless compression |
| Category | archive | archive |
Common reasons to convert ZIP to 7Z
- Opening the file on a system whose built-in tool doesn't support ZIP
- Matching the archive format a colleague or another tool expects
- Standardizing on one format so every file behaves the same way in your workflow
Your file, handled carefully
Uploads use TLS in transit and AES-256 SSE-S3 at rest in production (when the production S3 credential gate is enabled), are processed in an isolated job, and deleted on the schedule you choose — as fast as immediately. We don't index, search, or share files between accounts. Read the full security model →
Frequently asked questions
Is converting ZIP to 7Z free?
Yes — the Free plan includes 50 conversions every month, including ZIP to 7Z. Paid plans raise that limit.
Will I lose quality converting ZIP to 7Z?
7Z is open archive format with very high compression ratios. We use the highest-quality encoder settings by default so visual or data loss is minimized.
Do you keep a copy of my file?
Files are deleted automatically based on your plan's retention options. Free accounts can keep results for 1h or 24h; Pro and above add options such as delete-immediately and 7 days.
What is ZIP?
The most widely supported archive format.
What happens if a conversion fails?
You get a clear error message and the job is marked failed in your history — we never silently drop a file. Retry is one click. Monthly quotas count attempts (including failures) because processing starts as soon as the job is created.