Extract RAR Files Online — Free, No Install
RAR is one of the most widely shared archive formats on the internet, yet opening a .rar file typically requires installing WinRAR or a similar desktop app. FastZip lets you extract RAR archives directly in your browser — no download, no install, no sign-up required.
Drop your RAR file into the tool above and within seconds you'll see a full listing of every file inside. Choose to extract all files at once or download them individually. The entire process runs inside your browser using WebAssembly: your files are never uploaded to any server.
RAR4 vs RAR5 — FastZip supports both the legacy RAR4 format (used by WinRAR versions up to 4.x) and the modern RAR5 format introduced in WinRAR 5.0 (2013). RAR5 uses the BLAKE2 hashing algorithm for improved integrity checking and offers better metadata storage. If someone sent you a .rar file and you're unsure which version it is, don't worry — FastZip detects the format automatically.
Password-protected archives — Many RAR files found on software distribution sites are password protected. FastZip will prompt you for the password when it detects an encrypted archive. AES-256 encryption is supported for RAR5; older RAR4 files may use AES-128.
Multi-part RAR — Multi-part RAR archives (like archive.part1.rar, archive.part2.rar) are a common pattern for large files split across multiple downloads. To extract a multi-part set, upload each part and combine locally — full multi-part joining is planned for a future Pro feature.
When the extraction fails — If you see an "invalid archive" error, the most common causes are: (1) an incomplete download where the file is truncated, (2) the file is actually a different format renamed to .rar, or (3) the archive requires a password you don't have. Try re-downloading the file from the source.
Format & Feature Reference
| Feature | RAR4 | RAR5 |
|---|---|---|
| Max archive size (free) | 200 MB | 200 MB |
| Encryption | AES-128 | AES-256 |
| Integrity check | CRC-32 | BLAKE2 |
| Multi-part support | Yes (view) | Yes (view) |
| File comment metadata | Yes | Yes |
| Solid archive | Yes | Yes |
| Requires WinRAR | No | No |
Opening RAR Files on macOS
macOS has no built-in RAR support — double-clicking a .rar file does nothing unless you've installed The Unarchiver or WinRAR. FastZip solves this entirely in Safari or Chrome: open the page, drop your file, and you're done. Extracted files land directly in your Downloads folder in their original directory structure.
For large RAR files (over 100 MB) on macOS, Safari 16+ handles the memory allocation well. Chrome tends to be faster for very large archives due to its V8 engine's garbage collection tuning.
Opening RAR Files on Windows
Windows 11 can open ZIP files natively but has no built-in RAR support. The free version of WinRAR shows a persistent license nag after 40 days. FastZip gives you a clean, nag-free alternative — and because it runs in your browser, it works on any Windows machine including locked-down work or school computers where you can't install software.
If you're on Windows 10 and Edge, FastZip works perfectly. Edge is based on Chromium and runs the same WebAssembly engine as Chrome.
Troubleshooting RAR Extraction Errors
"Archive is corrupt" — The file likely didn't download completely. Check the file size against what the source advertises. A 1.2 GB RAR that downloaded as 800 MB will always fail to open.
"Wrong password" — RAR5 passwords are case-sensitive. Try both uppercase and lowercase variants. Some sites publish passwords with spaces at the beginning or end — paste carefully.
"Unexpected end of archive" — This means the file is a partial multi-part RAR and you're missing subsequent parts. Look for archive.part2.rar etc. alongside the file you have.