7Z File Viewer - Open 7z Files Online

Open .7z archives right in your browser - no 7-Zip, no install, no upload. Browse folders, preview images and text, and extract a single file or everything, even from password-protected 7z files. Got a ZIP or RAR instead? The ZIP File Viewer and RAR File Viewer have you covered.

Drop your 7z file here or browse Up to about 1.9 GB - split parts welcome. Nothing is uploaded. .7z.7z.001.cb7

Try a sample

The locked sample hides even its file names - the password is convertico.

Password-protected 7z Split .001 parts No upload

archive

Hide system junk__MACOSX, .DS_Store, Thumbs.db and desktop.ini - also left out when you extract ON

Remember recent archivesKeeps the last 6 archives up to 50 MB in this browser only - off by default OFF

How to open a 7z file online

Open the 7z file. Drop the .7z file anywhere on this page, click to browse or paste it. For a split archive, select every part (.7z.001, .7z.002 ...) at once.
Enter the password if asked. Locked archives ask for their password - right away if even the file names are hidden. It never leaves your browser.
Browse and preview. Walk through the folder tree, sort, search or switch to the gallery, and click any file to preview it without extracting.
Extract what you need. Download one file, tick several and get one ZIP, or extract everything - in Chrome and Edge straight into a folder.

Keyboard shortcuts

Search file namesCtrl + F
Move through the list↑ ↓ Home End
Open folder or previewEnter
Up one folderBackspace
Select / unselectSpace
Previous / next preview← →
Open another archiveCtrl + O
Close the previewEsc

7z viewer features

No 7-Zip needed

Works on Windows, Mac, Linux, Chromebook, iPhone and Android - anywhere a modern browser runs.

Locked 7z files

AES-256 archives open with their password, even when 7-Zip was told to encrypt file names.

Solid archives

See which files share a solid block and how big it is, so you know why the first preview takes a second.

Preview first

Images, text and code (with encoding detection), PDFs, audio, video and fonts open in a click.

Split 7z sets

Select .7z.001, .7z.002 ... together and they are joined in the right order.

Extract your way

One file, a selection or everything - as a fresh ZIP with a README or straight into a folder.

Safety report

Flags disguised programs like invoice.pdf.exe, paths that escape the folder and decompression bombs.

100% private

The 7z is unpacked by WebAssembly inside your browser. Nothing is uploaded.

Solid 7z archives, explained

Most 7z files are solid.

That means 7-Zip glues many files together and compresses them as one long stream, called a block.

Similar files then share one dictionary, which is why a 7z is often much smaller than a ZIP of the same folder. The catch: to pull out one file, everything before it in the same block has to be unpacked first.

Small archives - you won't notice, previews open instantly.
Big archives with one huge block - previews can take a few seconds, more for files near the end of a block.
Need everything? Use Extract all - one pass through each block is the fastest way.

The Archive info tab lists the number of solid blocks and the size of the largest one. Making your own archives for sharing? A plain ZIP from the Archive Creator lets people open single files faster.

Password-protected 7z files

7-Zip encrypts with AES-256, one of the strongest ciphers around.

It can lock just the file contents, or the file names too (the "Encrypt file names" box in 7-Zip).

What is locked	What you see before the password	Opens here
File contents only	Every name, size and date - you are asked for the password when you open a file	Yes
Contents and file names	Nothing - the password is needed to list the archive	Yes

Your password is used inside the browser tab only. Forgot it? Then the files are gone for good - AES has no back door, which is the whole point.

Which 7z settings open here

7-Zip offers several compression methods and filters.

This viewer reads the ones 7-Zip, p7zip, NanaZip and PeaZip actually use.

Method or filter	Where you meet it	Supported
LZMA2, LZMA	The default in every 7-Zip version	Yes
PPMd	Text-heavy archives (Ultra, or chosen by hand)	Yes
BZip2, Deflate, Copy	Faster or "store only" settings	Yes
BCJ, BCJ2, ARM filters	Added automatically when a 7z holds programs (.exe, .dll)	Yes
AES-256 with LZMA / LZMA2	Any 7z with a password	Yes
Zstandard, Brotli, LZ4	Only the 7-Zip ZS fork	No - use 7-Zip ZS

Hit an unusual one? The viewer still lists every file and tells you exactly which method blocked the unpacking.

About the 7z format

7z is the native format of 7-Zip, the free archiver Igor Pavlov released in 1999.

Its LZMA compression usually beats ZIP by a wide margin, which made 7z popular for game mods, software downloads, ROM packs and backups.

The trade-off is support: Windows 11 only recently learned to open 7z files, and phones need an extra app. That is where this viewer helps - any browser works.

7z vs ZIP vs RAR

ZIP opens everywhere and lets you grab single files instantly, but compresses less - see the ZIP File Viewer.
RAR compresses about as well as 7z and adds recovery records, but needs WinRAR to create - open one with the RAR File Viewer.
TAR.XZ uses the same LZMA2 family on Linux - the TAR File Viewer opens it.

Got a disc image or a Windows cabinet inside your 7z? Open it right here, or use the ISO File Viewer and CAB File Viewer. Browse all file viewers for other formats.

Frequently Asked Questions

Drop the .7z file onto this page. It is unpacked inside your browser, so you can browse the folders, preview files and download what you need without installing 7-Zip or any other app.

It works on Windows, Mac, Chromebooks and phones.

Yes. 7z files locked with AES-256 open as soon as you type the password, and that includes archives where 7-Zip also encrypted the file names. The password stays in your browser tab and is never sent anywhere.

Without the right password nobody can open the files - not us and not 7-Zip.

7-Zip usually makes solid archives: many files are compressed together as one block, which shrinks them more. To get one file out, everything before it in its block has to be unpacked first.

The Archive info tab shows how many blocks there are and how big the largest one is.

Select all the parts at once in the file picker, or drop them together. They are joined in the right order and opened as one archive.

If a part is missing, the viewer tells you which one.

Up to about 1.9 GB. The 7z engine runs in WebAssembly and needs the whole archive in memory, so very large archives are better opened with 7-Zip on a computer.

Previews and extraction of single files work at any size within that limit.

No. The archive is read by your own browser and never leaves your device - you can even disconnect from the internet after the page has loaded.

Passwords stay in the tab, too.

Yes. Press Extract all and you get a ZIP with every file and folder from the 7z, plus a short README.

ZIP files open everywhere without extra software, which makes them easier to share. To build a new 7z instead, use the Archive Creator.

The viewer checks the first bytes of the file, not its name. A ZIP, RAR, ISO or CAB renamed to .7z still opens here and you are told what it really is.

Documents, images and programs get a link to the right ConvertICO tool, such as the PDF Viewer.

Guides & Tutorials

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