RAR is the format people reach for when they want better compression than ZIP and more durability than a single tar.gz, especially for game mods, large media bundles, software releases, and recovery-record-protected backups. The downside is that RAR is proprietary to RARLAB, so almost no operating system can open one out of the box and the official WinRAR is paid shareware that nags forever. This WinRAR Extractor solves that one specific problem in the browser. It is a privacy-first, install-free, fully client-side RAR extractor built on the 7-Zip engine compiled to WebAssembly, which licenses the official RAR unpacker from RARLAB. You drop a .rar file in, optionally type a password, and you get the contents back — without your archive ever leaving your device. The same flow handles unencrypted archives, password-protected RAR4 archives, password-protected RAR5 archives, header-encrypted archives, solid archives, and modern multi-gigabyte data dumps.
A WinRAR / RAR extractor is a tool that reads either of the two RAR container formats (RAR4 or RAR5), decompresses their proprietary content streams, optionally decrypts AES-encrypted blocks using a user-supplied password, and writes the original files back out. RAR4 uses AES-128 in CBC mode for content encryption and a custom proprietary compressor with a 4 MB dictionary. RAR5 uses AES-256 in CBC mode with PBKDF2-HMAC-SHA256 for key derivation, BLAKE2sp for integrity, and a more efficient compressor with up to 1 GB dictionaries. Both formats support optional header encryption, which hides filenames and the archive structure until the correct password is supplied. Most online unrar tools either lack RAR5 support or strip out password handling. This tool ships the licensed RAR unpacker as compiled into the 7-Zip codebase, so every standard feature is supported — RAR4, RAR5, AES-128 / AES-256, header encryption, solid blocks, BLAKE2sp checksums, and Unicode filenames. It runs entirely in your browser; nothing is uploaded.
Licensed RAR Unpacker via 7-Zip WebAssembly — the official RAR unpacking code from RARLAB, as integrated into the 7-Zip codebase, compiled to portable WASM and lazy-loaded only when you open this page. RAR4 and RAR5 Support — both format generations are detected automatically and decoded transparently. Password Support — AES-128 (RAR4) and AES-256 (RAR5) decryption plus header decryption, with the password processed locally and never transmitted. List Before Extract — a fast listing pass shows every entry with name, size, compressed size, modified date, and encryption flag before any data is decompressed. Selective Extraction — tick exactly the files you want; only those are decompressed and downloaded. Bulk Extraction — Extract All packs every entry into a single ZIP for one-click download. Solid Archive Support — the decoder handles RAR solid blocks correctly, including selective extraction inside a solid block. Stream To Disk — on Chromium browsers, extracted files can be written directly to a folder you pick using the File System Access API. Drag and Drop — drop a .rar file anywhere on the upload zone. Privacy by Design — all decompression and decryption happens on-device. Works Offline — once cached, the page works without an internet connection.
When you drop a .rar file onto the upload zone, the browser hands the tool a File reference. That reference is mounted into the WebAssembly file system, exposing the file as random-access storage without copying its bytes into JavaScript memory beyond what is necessary. The 7-Zip engine then performs a list pass: it reads the archive's signature to determine whether the file is RAR4 (signature 'Rar!\x1A\x07\x00') or RAR5 (signature 'Rar!\x1A\x07\x01\x00'), locates the main archive header (decrypting it first if header encryption is enabled and a password was supplied), and walks the file headers to enumerate every entry. The listing is parsed back into the React UI as a table. When you click Extract on one or more entries, the engine seeks to the appropriate compressed block, decrypts it if necessary using AES-128 (RAR4) or AES-256 (RAR5) with a key derived from your password through the format-specific KDF, and decompresses the output stream using the corresponding RAR decompressor. RAR5 archives also have their integrity verified against the archive's BLAKE2sp checksums on the fly. The decompressed bytes are then either packaged into a Blob and offered as a download or streamed directly to a writable file handle on disk if your browser supports the File System Access API. Throughout the process the JavaScript layer only sees high-level events; the heavy cryptographic and decompression work stays inside WebAssembly where it runs at near-native speed.
Receiving a Password-Protected RAR Over Email — a colleague or vendor sends a sensitive bundle as an encrypted .rar; you need to open it on a machine where you cannot install WinRAR. Drop, type the password, extract, done. Opening Game Mods and Texture Packs — modding communities ship updates as .rar to save bandwidth and to take advantage of recovery records; casual users without a desktop archiver can pull individual files out without installing anything. Forensics and Incident Response — analysts working in air-gapped or tightly controlled environments need to crack open vendor-supplied evidence bundles without provisioning new software. Software Distribution — installers and patches for games, modding tools, and small commercial software are often packaged as RAR; pulling out a single asset for inspection is a routine workflow. Recovering Old Personal Backups — encrypted RAR backups from previous systems can be read on any modern device, including Macs and Chromebooks where WinRAR has historically been awkward to install. Avoiding the WinRAR Nag — many users only ever extract RAR files and have no need for the paid full WinRAR experience; a browser tool eliminates the trial reminder entirely. Embedded and Locked-Down Devices — Chromebooks, kiosks, and managed enterprise machines often forbid installing archive tools but allow web browsing.
Most RAR-extraction tasks happen on machines where installing software is either inconvenient or impossible, or where the user simply does not want to deal with WinRAR's perpetual trial reminder. A browser-based extractor removes that friction entirely. It also removes the security trade-off that comes with most online extractors, which require uploading the archive to a remote server before doing anything. Uploading is unacceptable for sensitive content and unnecessary for the kind of work most users actually need to do. By moving the entire extraction pipeline into WebAssembly inside your own browser, this tool offers the convenience of a web app with the privacy of a desktop app, plus the cross-platform reach that desktop apps still struggle with — it works the same way on Windows, macOS, Linux, ChromeOS, iOS, and Android. It is also one of the few practical ways for Mac and Linux users to open an encrypted RAR5 archive without installing the official RARLAB command-line tool.
Mac and Linux users who receive RAR archives and would rather not install the proprietary RARLAB tools. IT support and helpdesk teams who routinely receive RAR files from end users and need to inspect contents quickly. Game modders and modpack authors whose users span every operating system and skill level. Security analysts who must keep sensitive archives off third-party servers but need ad-hoc extraction. Developers and reverse engineers who want to peek inside a single asset within a large solid RAR without committing to a full install. Educators teaching about compression and archives who want a no-install demonstration tool. Power users on locked-down corporate machines who lack admin rights but still need to open a password-protected RAR occasionally. Anyone who has ever Googled 'how do I open a rar file on a Mac' or 'open password-protected rar online without uploading' and wanted a single, trustworthy answer.
Open the tool in any modern browser — Chrome, Edge, Brave, Opera, Firefox, or Safari all work. The first time you visit, the page downloads a small JavaScript bundle and a roughly 1.6 MB WebAssembly binary; subsequent visits load from cache and are instant. Drag your .rar file from your file manager onto the upload zone, or click the zone to open the system file picker. The tool runs a fast listing pass and shows you every entry inside the archive in a sortable table. If the archive uses encrypted headers (filenames hidden), the password field appears immediately and the listing waits until you supply the password. For archives with only encrypted contents, the listing appears right away and the password field activates when you click Extract. Select the files you want — use the header checkbox to select all — and click Extract Selected or Extract All. If your browser supports the File System Access API and you click Save to Folder, you will be prompted to pick a destination folder on disk and files will stream there directly.
Verify the archive integrity before assuming a password is wrong: a failing extraction with a known-good password almost always means the archive itself is corrupt. RAR5 archives include BLAKE2sp checksums per entry, so a corrupt entry reports an integrity error rather than a password error. Use Chromium-based browsers for very large archives: Chrome, Edge, Brave, and Opera support the File System Access API which lets the tool stream extracted files straight to disk. Prefer Extract Selected over Extract All when you only need a few files from a non-solid archive: the decoder can skip directly to the relevant blocks. For solid archives, this optimization does not apply because the entire solid block must be decoded regardless. Always copy passwords directly from a password manager rather than retyping them: RAR passwords are case-sensitive and a single stray space causes a hard failure. If you receive a multi-volume archive split into .part1.rar / .part2.rar or .rar / .r01 / .r02, recombine the parts first with the official WinRAR or rar tool. Keep your browser up to date for the best WebAssembly performance.
Multi-volume archives (.part1.rar, .part2.rar, ... or .rar, .r01, .r02, ...) are not supported in this version — recombine the volumes externally first. Creating new RAR archives is out of scope and is in fact impossible for any non-WinRAR tool because the RAR creation algorithm is proprietary; this tool is read-only. Recovery-record-based repair of damaged RAR archives is not implemented in this version; use the official WinRAR for repair operations. Single-file extracted output on Firefox and Safari is bounded by available browser memory, typically around 2 GB; Chromium browsers with stream-to-disk are not subject to this limit. The first visit downloads a roughly 1.6 MB WebAssembly binary, which on very slow connections can take a few seconds. Extraction speed on mobile devices is bound by the device CPU and is noticeably slower than on a modern desktop or laptop. Extremely old RAR1 / RAR2 archives produced by long-discontinued early WinRAR versions may not be recognized; in those rare cases, a desktop alternative is required.
Yes. The WinRAR / RAR extractor runs entirely inside your browser using a WebAssembly build of the 7-Zip engine, which has full read support for both RAR4 and RAR5 archives including AES-encrypted entries. Your archive and your password are never uploaded — there is no network request that carries your data once the page has loaded. The cryptographic operations happen inside WebAssembly on your own device. This is the same security guarantee you would get by installing WinRAR or 7-Zip locally, with the convenience of not having to install anything. We recommend this approach for sensitive backups, encrypted exports, security-tool dumps, and confidential business archives where uploading to a third-party server would be unacceptable.
Yes. The 7-Zip engine that powers this tool supports both major RAR generations. RAR4 is the legacy format used by WinRAR up through version 4 and is still emitted today when archives are created with backward-compatibility settings; it uses AES-128 in CBC mode for password encryption and a custom proprietary compressor. RAR5 was introduced in WinRAR 5.0 and is the modern default; it uses AES-256 in CBC mode with a PBKDF2-based key derivation, has stronger integrity checking via BLAKE2sp, and supports larger dictionaries. The extractor detects which generation the archive uses from the file signature and applies the right decoder automatically — you do not need to choose.
Both formats use AES, but with different parameters. 7z uses AES-256 in CBC mode with a SHA-256-based key derivation function and a high iteration count, applied to a single solid block. RAR4 uses AES-128 in CBC mode, while RAR5 uses AES-256 in CBC mode with PBKDF2-HMAC-SHA256 and a configurable iteration count. Both formats also offer optional header encryption, which hides filenames and the archive structure until the correct password is supplied. From a practical security standpoint, RAR5 with a strong password is comparable to 7z with a strong password — the limiting factor is password entropy, not the cipher. The extractor handles all of these variants transparently; the only thing you ever see is the password prompt.
Only extraction. The RAR algorithm itself is proprietary to RARLAB and is not legally redistributable as a creator. The 7-Zip engine, like every other non-WinRAR tool, ships only the unpacker side under license from RARLAB. This is a deliberate restriction by the format owner, not a limitation of this tool. If you need to create RAR archives you must use the official WinRAR or RAR command-line tools from RARLAB; if you are looking for a free, open archive format with similar capabilities and creation support, 7z is the standard choice and we offer a 7z extractor here as well.
A 'wrong password' result almost always comes from one of a few causes. First, caps lock or a different keyboard layout can silently substitute characters; try typing the password in a plain text field first to verify. Second, copy-pasted passwords often pick up a leading or trailing whitespace character — try retyping it manually. Third, the archive may actually be corrupt: a failed download or transfer can damage the encrypted blocks so that no password works. Fourth, on header-encrypted RAR archives, the password is required just to read the entry list; if the listing succeeds with one password and extraction fails with the same one, the archive is almost certainly corrupt rather than misconfigured. If you have a fresh copy of the archive and a verified password but extraction still fails, the file is most likely corrupt and needs to be re-downloaded from the source.
A solid archive treats all the files inside as one continuous stream of data, then compresses that whole stream as a single block. This typically gives much better compression ratios than compressing each file separately, which is why WinRAR uses solid mode for collections of similar files when the user enables it. The trade-off is that to extract any single file from a solid archive, the decoder usually has to decompress everything in that solid block up to and including the file you want. The extractor fully supports solid RAR archives — the underlying engine implements the full RAR4 and RAR5 decoders with solid block handling. If you only need one file from a very large solid archive, expect extraction time to scale with the position of that file inside the solid block, not with the file's own size.
Not directly in this version. WinRAR can split a single archive across multiple volume files, named either with the .part1.rar / .part2.rar / ... convention (RAR5 default) or the older .rar / .r01 / .r02 / ... convention (RAR4). To extract a multi-volume archive in this tool, recombine the volumes first with the official WinRAR or rar / unrar command-line tool, then load the single combined .rar file here. Adding native multi-volume support to the browser tool is on the roadmap but requires holding multiple file handles simultaneously, which has UX and memory implications we are still working through.
Yes. After you load the archive, the tool runs a fast list pass that shows every entry with its name, uncompressed size, compressed size, last-modified date, and an encrypted indicator. You can tick the checkbox next to any subset of entries and click Extract Selected, and only those entries are decompressed and offered as downloads. For non-solid RAR archives this is a real time saver because the decoder seeks straight to the requested entries. For solid archives the decoder still has to process the surrounding solid block, so partial extraction is not always faster than extracting everything, but you still only download the files you actually need.
Functionally the result is identical: both tools implement the documented RAR unpacking algorithm under the same RARLAB license. The differences are practical. A browser-based extractor requires no installation, no admin rights, no nag screen, and works on any operating system including Chromebooks, locked-down work laptops, macOS, and tablets. It is ideal for one-off extractions, for users who do not have permission to install software, and for users who do not want to deal with WinRAR's perpetual 'trial expired' reminder. The desktop application is faster on very large archives because it can use multiple CPU cores aggressively and can write directly to disk without browser sandboxing overhead, so for daily heavy use a desktop tool may still be preferable.
Yes. The extractor consists of a small JavaScript bundle and a single WebAssembly binary, both of which the browser caches after the first visit. Once the page has loaded, you can disconnect from the internet and continue extracting archives — no network access is required for any decompression or decryption step. This makes the tool useful in air-gapped or restricted-network environments, such as forensics labs or secure offices, where uploading data to a remote service would be against policy.