RAR to 7Z Converter
Convert RAR to 7Z online for free. Fast, secure archive conversion that preserves folder structure and file integrity. No software installation required.
Max file size 10MB. Sign up for more.
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Checking files and selected output formats.
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Convert RAR Archives in 3 Steps
Repackage archived files for better compatibility, compression, or extraction support without installing desktop archive software.
Drag and drop your .rar file into the converter above, or click "Choose Files" to browse your device.
Click "Convert All" and our server re-packs your files from RAR into 7Z format while preserving the complete folder structure.
Your converted .7z archive is ready instantly. Click Download to save it to your device.
Why Convert RAR to 7Z
7z with LZMA2 compression produces significantly smaller archives than ZIP, RAR, or any other mainstream format. Large file collections can be compressed 30-70% more than ZIP achieves.
7z encrypts both file contents and filenames with AES-256 encryption. Even the names of archived files are hidden from anyone without the password, providing stronger security than ZIP encryption.
7z supports solid compression that treats multiple files as a single data stream. Archiving many similar files — like source code or documents — produces dramatically smaller archives with solid mode.
7z is a completely open format with free tools available on every platform. There are no licensing fees or proprietary restrictions. 7-Zip, PeaZip, and Keka all handle 7z files for free.
7z archives can be split into multiple volumes of a specified size. Split a 10 GB archive into 2 GB chunks for uploading to file size-limited services or burning to multiple discs.
RAR vs 7Z: Side-by-side
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | RAR | 7Z |
|---|---|---|
| Full name | Roshal Archive | 7-Zip Archive |
| Year introduced | 1993 | 1999 |
| Developer / standard body | Eugene Roshal | Igor Pavlov |
| MIME type | application/vnd.rar | application/x-7z-compressed |
| File extension | .rar | .7z |
| Compression | RAR (proprietary) | LZMA / LZMA2 (best ratio of common formats) |
| Color / data depth | N/A | N/A |
| Max dimensions / size | Unlimited (RAR5) | 16 EB file size |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | RAR (proprietary, WinRAR) | 7-Zip (open) |
| Best for | Better compression than ZIP, password protection, recovery records | Maximum compression — typically 30–50% smaller than ZIP |
About the RAR Format
RAR (Roshal Archive) is a proprietary archive format created by Eugene Roshal in 1993. It uses a proprietary compression algorithm and offers several advanced features including solid compression, which compresses multiple files together as a single data stream to achieve better compression ratios than compressing each file individually. RAR is particularly popular for large file distribution across the internet.
RAR supports built-in recovery records that allow damaged archives to be partially or fully repaired, as well as multi-volume splitting for distributing large archives across multiple smaller files. Creating RAR archives requires WinRAR or compatible licensed software, though many free tools like UnRAR can extract them. While RAR is being gradually supplemented by open alternatives like 7Z, it remains common for file distribution due to its robust error recovery and strong compression capabilities.
Archive Format Guides for RAR to 7Z Converter
Read compatibility and compression guides for ZIP, 7Z, RAR, TAR, and related archive workflows.
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