Does ZIP → 7Z lose quality?

The target format compression is neutral (lossless or container-only) - neither degrades nor improves quality.

Password-protected archives?

No. Remove the password in 7-Zip / WinRAR / unzip first, then upload.

XZ and 7Z (both LZMA2) usually produce the smallest files - at the cost of slower compression. ZIP / GZ are faster but bigger.

No - RAR is patent-encumbered and commercial. We can only read it (via unrar-free). For creating use ZIP, 7Z or TAR.GZ.

Can I extract ISO / DMG?

Yes - upload ISO/DMG, pick ZIP as the target, get the contents packaged.

Is the conversion safe?

Yes. Small files convert inside your browser - never uploaded. Larger ones land on our server temporarily and are wiped automatically: 200 MB after 10 min, 100 MB after 20 min, 50 MB after 30 min, smaller after one hour. You can also delete them instantly after download.

Yes - 200 MB max per file. Larger files get rejected for performance and cost reasons.

Do you preserve original quality?

Depends on the pair. Lossy compression (e.g. JPG, MP3) always trims something - we set sensible defaults. Lossless (FLAC, PNG, ZIP) keeps everything 1:1.

Do I need an account?

No. The converter works right away - no signup, no login, no payment.

YourDevToolsPro

ZIP to 7Z converter

ZIP to 7Z converter online. Free, no watermarks, no account.

Runs in your browser

ZIP → 7Z converter

ZIP to 7Z conversion in 3 steps: upload, click convert, download.

Files auto-delete from our server

Anything you upload is wiped 3 minutes after you close this tab or leave the tool. Protects your privacy and keeps our disks clean.

Drop a file here or click to pick one

The file goes to our server, gets converted, and is wiped automatically.

Up to 200 MB per file

Your privacy. Small files convert locally in your browser. Larger ones land on our server temporarily and are wiped automatically, latest after one hour. You can also delete them instantly after downloading.

Convert ZIP to 7Z

ZIP to 7Z converter: upload, click convert, download the result. Free, no watermarks, no account. Small files convert inside your browser (never uploaded). Larger ones go to our server and disappear automatically after a few minutes. Hit "Delete now" to wipe them instantly after download.

How to convert

Pick your ZIP file - drag it onto the dropzone or click to choose.
The target format 7Z is already selected.
Hit Convert and wait a few seconds. Larger files take longer.
Download the result. Press Delete now to wipe the server copy immediately.

When to use it

Universal format - RAR / 7Z → ZIP (opens everywhere without WinRAR).
Compression - ZIP → 7Z / TAR.XZ for the smallest size.
Linux / CI - ZIP → TAR.GZ for deployment.
ISO/DMG images - extract contents.
ZIP → 7Z - the typical reason.

Frequently asked questions

7z packs 20-40% tighter than ZIP thanks to LZMA2 and supports stronger AES-256 encryption with proper header protection. The downside: the recipient needs 7-Zip. Use this for large archives shared with technical users.

Related tools

File Converter

Swap a file format in 3 steps. 200+ formats: images, video, audio, documents, archives, ebooks, fonts.