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RAR & 7Z Extractor

Open .rar and .7z archives in your browser

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About this tool

RAR & 7Z Extractor on UtilityKit opens .rar and .7z archives directly in your browser using a WebAssembly build of libarchive (libarchive.js). There is no install, no desktop archiver, and no upload — the archive is loaded into a worker thread and unpacked locally with the wasm runtime. The tool also handles .zip, .tar, and .tar.gz since libarchive is a multi-format library. Drop in an archive up to 100 MB; the file list appears with paths and uncompressed sizes, and any file can be downloaded with one click. Standard-encrypted archives prompt for the password and decrypt locally so the password never leaves your browser. Solid 7z archives and very large files may run slowly since everything is single-threaded — for those a desktop tool is faster — but ordinary RAR/7z archives extract fine on a Chromebook or any restricted machine without installing anything.

Why use it

  • True .rar & .7z Support: Reads native RAR (versions 1.5–5) and 7z archives via libarchive.js's WebAssembly build.

  • Local Decryption: Password-protected archives are decrypted in your browser; the password never reaches a server.

  • Multi-Format: Side benefit — also handles .zip, .tar, .tar.gz, and ISO formats supported by libarchive.

  • No Install: Works on Chromebooks, restricted corporate machines, and any device that can run a modern browser.

  • Selective Extraction: Pull out one file at a time without expanding the entire archive to disk.

  • Free & Unlimited: No signup, no email, no ads, no daily cap.

How to use

  1. Drop a .rar or .7z file onto the dropzone (max 100 MB).
  2. On first use, the WebAssembly extractor downloads from the libarchive.js CDN — subsequent runs are cached.
  3. If the archive is password-protected, the tool prompts for the password and decrypts locally.
  4. Browse the file list — paths and uncompressed sizes are shown for every entry.
  5. Click the down-arrow next to any file to download it as a binary blob.
  6. If extraction fails, the archive may use solid mode, an exotic encryption profile, or simply be too large for browser memory — fall back to 7-Zip on your desktop.

When it helps

  • When you receive a .rar or .7z attachment and don't have WinRAR or 7-Zip installed.
  • When inspecting an unfamiliar 7-Zip archive to see what is inside before unpacking on disk.
  • When grabbing a single file out of a multi-file RAR without expanding the rest.
  • When working on a Chromebook, locked-down corporate laptop, or library computer.
  • When auditing a password-protected archive whose password you have, without trusting the password to a third-party online service.
  • When converting between formats — open a .7z, then re-bundle the contents with the ZIP Creator tool.

Examples

Open a .7z without installing 7-Zip

Input
screenshots.7z (45 MB)
Expected result
File list shown with 32 PNG files — pick the ones you need without installing anything.

Extract one file from a RAR

Input
release.rar (80 MB)
Expected result
Just install.exe downloaded — the other 200 MB of media stay in the archive.

Tips

  • If a .7z fails to open, try unpacking it once with 7-Zip on your desktop to confirm the archive is not corrupted before retrying here.
  • For multi-volume RAR sets, this browser-only tool is unreliable — use 7-Zip or WinRAR for those cases.
  • Solid 7z archives extract slowly because every single-file extraction touches the whole compressed stream — keep input size modest.
  • Use the ZIP Creator afterward to re-bundle the extracted files into a more universally compatible .zip if you need to share with non-7-Zip users.
  • For sensitive archives, work offline once the page is cached — both decryption and extraction are 100% local.

Frequently Asked Questions

Are my files uploaded?
No. libarchive.js runs in your browser as a WebAssembly worker. The archive is read locally, decrypted (if needed) locally, and the extracted files stay on your device.
What is the file size limit?
100 MB per archive. The WebAssembly extractor runs single-threaded in your browser, so larger archives may run slowly or exceed memory on low-RAM devices.
Does it support password-protected archives?
Yes for standard AES-encrypted .7z and RAR archives. The tool prompts for the password and runs decryption locally — the password never leaves your browser.
Are solid 7z archives supported?
Solid 7z archives are technically supported by libarchive but may be slow because the entire archive must be decompressed to extract any single file. For very large solid archives, a desktop tool is faster.
What about RAR5 (the modern RAR format)?
Yes. libarchive supports RAR1.5 through RAR5. Multi-volume RAR sets (.r00, .r01, .part1.rar) require all parts in one folder and may not be supported in this browser-only build.
Why is the first extraction slow?
On first use, the WebAssembly module (~2 MB) downloads from the libarchive.js CDN. Subsequent loads are cached by your browser, so later sessions are much faster.
Does it support .zip and .tar.gz too?
Yes. libarchive is a multi-format library, so .zip, .tar, .tar.gz, .iso, and several other formats also open. For ZIP-only or tar-only work, the dedicated tools are slightly faster.
Is the tool free?
Yes — completely free, no signup, no email, no ads, and no daily limit.

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Glossary

RAR
A proprietary archive format created by Eugene Roshal. Known for high compression ratios and built-in error recovery records. Currently in version 5.
7z
An open-source archive format originated by 7-Zip. Uses LZMA / LZMA2 compression and AES-256 encryption, often producing smaller archives than .zip.
Solid archive
A 7z option that compresses all files together as a single stream. Improves compression ratio but means you must decompress the whole archive to extract any single file.
libarchive
An open-source C library that reads and writes many archive formats. The WebAssembly port (libarchive.js) brings this support to the browser.