Open an archive, see what is in it, preview the text files and images, and save just the files you want rather than all of them. It opens ZIP, and also the formats Windows cannot open by itself or only recently learned to: RAR (including RAR5), 7z, TAR in all its compressed forms (.tar.gz, .tgz, .tar.bz2, .tar.xz), ISO disc images, CAB, LHA and CPIO. Or build a ZIP from files you drop in.
It also takes the files out of installers and disk images without installing or mounting anything: MSI packages, with every file under its real name and the folder it would install to; many setup EXEs; Mac DMG files, on Windows too; Windows WIM and ESD images; and virtual machine disks (VHD, VHDX, VMDK, QCOW2, VDI).
It can also password-protect a new ZIP with AES-256 encryption, the WinZip format that 7-Zip, WinRAR and PeaZip open, without paying for an archiver, and it opens password-protected ZIPs, AES or the older ZipCrypto, when you know the password.
Everything happens in the page, so it works on a machine where you cannot install an archiver. It is free to use, with no account and no upload limit, and it runs entirely in your browser: nothing is uploaded, and while the page stays open, a feature you have already used keeps working offline.
- Which compression level should I choose?
- Balanced for almost everything. Smallest is noticeably slower for a few percent more, and Store applies no compression at all - useful when the contents are already compressed, like JPEGs or MP3s, where squeezing again gains nothing.
- Can I open a RAR or 7z file without installing anything?
- Yes. Choose Open an archive and drop the .rar or .7z file in: the list of files appears, and each one is unpacked when you view or save it. It reads RAR4 and RAR5, and 7z with LZMA, LZMA2, PPMd, BZip2 or Deflate compression. What it cannot open is a RAR or 7z protected with a password, as their encryption is not supported here, or a multi-part RAR (.part1.rar, .part2.rar); 7-Zip, WinRAR or PeaZip handle those.
- Can I extract the files from an MSI without installing it?
- Yes. Drop the .msi in and its files are listed under their real names, in the folders they would be installed to (Program Files, System and so on), read from the installer's own tables; save one or all of them. Nothing is installed and nothing runs. Some installers keep their files in separate .cab files that come beside the .msi; it says so, and those .cab files open here too. Many setup EXEs open the same way, those made with NSIS, Microsoft's cabinet tools or 7-Zip; ones made with Inno Setup or InstallShield do not.
- Can I open a DMG file on Windows?
- Yes. A DMG is a Mac disk image, and Windows has nothing that reads one. Drop it in and the files inside are listed, apps included (an app is a folder of files ending in .app), ready to save. Compressed DMGs (zlib, bzip2, LZFSE) open; encrypted ones do not.
- Can it open a .deb or .rpm package?
- Yes. A Debian or Ubuntu .deb and a Fedora, Red Hat or openSUSE .rpm show the files the package would install, ready to view or save, without installing anything; a .deb's control files (its name, version, dependencies and install scripts) are listed too, under DEBIAN/. Packages compressed with gzip, xz, bzip2 or Zstandard all open. Chrome extensions (.crx) open as the ZIP inside them, and so do Firefox add-ons (.xpi), VS Code extensions (.vsix), NuGet packages (.nupkg) and Python wheels (.whl), which are ZIPs under another name.
- Can I get files out of a VHD, VMDK or other virtual disk without mounting it?
- Yes, for VHD and VHDX (Hyper-V and Windows backups), VMDK (VMware), VDI (VirtualBox) and QCOW2 (QEMU), and for WIM and ESD images from Windows setup. The filesystem on the disk is opened for you, NTFS, FAT, ext4, HFS+ or APFS, and only the parts of the file being read are loaded, so a disk of several gigabytes opens without filling the browser's memory. A disk encrypted with BitLocker or similar cannot be read.
- Can it open a password-protected ZIP?
- Yes, if you know the password. It reads the two common kinds of ZIP encryption, AES and the older ZipCrypto, and asks for the password on the page; files in the archive that were never encrypted open without it. A wrong password is refused with a message rather than producing garbage. It cannot guess, recover or crack a password you do not have.
- AES-256 or ZipCrypto: which should I pick for a ZIP password?
- AES-256, unless the person receiving it can only use what Windows has built in. AES-256 is strong, but Windows' own ZIP support cannot open it, so they need 7-Zip, WinRAR, PeaZip or a similar archiver; on a Mac, Keka or The Unarchiver open it, and the built-in Archive Utility could not before macOS 11. ZipCrypto opens in Windows' built-in ZIP support and nearly every archiver, but it is an old, weak scheme that freely available tools can break, so use it only to keep casual eyes out.
- Does a ZIP password hide the file names?
- No. ZIP encryption covers what is in each file, not the list of names, folders and sizes, which anyone can read without the password. If the names themselves are private, make an ordinary ZIP first and then put that one file into a protected ZIP. The password is never saved or sent anywhere, so if it is forgotten the contents cannot be recovered.
- Is my archive uploaded?
- No. Archives are built and read in the page: ZIPs by fflate, or by zip.js when a password is involved, RAR, 7z, TAR and the rest by libarchive, the library behind the bsdtar command, and installers and disk images by 7-Zip, both running as WebAssembly. A folder of documents stays on your machine and a password never leaves it.
- How big an archive can it handle?
- It works in your browser's memory. A ZIP that unpacks to no more than 250 MB, with no single file over 150 MB, is unpacked whole when it opens. A bigger ZIP, or one compressed with a method such as Deflate64, BZip2 or LZMA, is read by 7-Zip instead: only listed when it opens, with each file unpacked when you ask for it, up to 512 MB a file. Other archives are read the same way, up to 1 GB. More than 5,000 files is refused. Installers, DMGs and disk images are read in place, only the parts needed, so they can be several gigabytes; single files inside are still limited to 512 MB.
- Can I extract just one file?
- Yes. Open the archive, find the file and save that one, or take all of them at once. Saving all keeps the folders: in Chrome and Edge you pick a folder and the tree is recreated inside it, and in other browsers each file's folders go into its name so two files called the same thing do not collide.