7Z Converter
Convert files to and from 7Z — free, online, no signup.
up to 50 files at once
auto-delete in 24h · no signup · no watermark
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7Z is the native format of the open-source 7-Zip archiver, created by Igor Pavlov in 1999. Its LZMA compression typically shrinks files 20–40% smaller than the same content as ZIP, at the cost of needing 7-Zip (or a compatible tool) to open. It is the format of choice when archive size matters more than universal compatibility.
| Full name | 7-Zip archive |
| Developer | Igor Pavlov |
| Released | 1999 |
| Type | Compressed archive |
| Typical use | maximum compression for backups and large transfers |
| MIME | application/x-7z-compressed |
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Frequently asked questions
How do I open a 7Z file?
7Z is the native format of the open-source 7-Zip archiver, created by Igor Pavlov in 1999. Its LZMA compression typically shrinks files 20–40% smaller than the same content as ZIP, at the cost of needing 7-Zip (or a compatible tool) to open If a device refuses to open it, the fastest fix is converting it to a more universal format with the converter above.
Is converting 7Z files free?
Yes — 10 conversions a day with files up to 200 MB, free, with no signup and no watermarks.