.rar — RAR Compressed Archive
Alexander Roshal (RARLAB) · 1993
RAR (Roshal Archive) is a proprietary archive format known for its superior compression ratios compared to ZIP.
Key Features
- Lossless storage behavior for typical archive workflows
- Common MIME type: application/vnd.rar
- Recognizable file signature: 52 61 72 21 (Rar!)
- Associated with Alexander Roshal (RARLAB)
Best For
- Packaging files for download
- Backups and transfers
- Reducing storage overhead
Less Ideal For
- Direct viewing without extraction
- Live editing inside the package
- Formats requiring immediate preview
Common Use Cases
- Bundling many files together
- Reducing transfer size
- Preserving directory structure during sharing
How to Open It
- On Windows, open the file with WinRAR or 7-Zip.
- On macOS, open the file with The Unarchiver or Keka.
- If the file does not open, confirm that the extension really matches .rar and that the download or transfer completed without corruption.
What is a .rar file?
RAR (Roshal Archive) is a proprietary archive format known for its superior compression ratios compared to ZIP. Created by Russian software engineer Alexander Roshal, RAR files typically achieve 10-30% better compression than ZIP. RAR also supports advanced features like multi-volume archives (splitting large files), solid compression, recovery records, and AES-256 encryption. While creating RAR files requires WinRAR, many free tools can extract them.
Programs That Open .rar Files
| Platform | Program | ||
|---|---|---|---|
| Windows | WinRAR | Paid | Official |
| 7-Zip | Free | ||
| PeaZip | Free | ||
| macOS | The Unarchiver | Free | |
| Keka | Free |
Common Problems with .rar Files
Frequently Asked Questions
.rar files can be opened with several programs. WinRAR is one of the most popular choices.
Generally yes, .rar files are safe to open with appropriate software.
Yes, there are many online and offline tools available to convert .rar files. Check the conversion section above for specific methods.
Technical Details
RAR Compressed Archive files use the application/vnd.rar MIME type and were first introduced in 1993 by Alexander Roshal (RARLAB). The file can be identified by its signature: 52 61 72 21 (Rar!).