ISO File Viewer & Extractor

Open ISO disc images in your browser and extract files from an ISO without mounting, burning or installing anything. Images of any size open in a moment - Linux and Windows installers, old game discs and software CDs - because only the parts you look at are read, and nothing is uploaded. Found a CAB or 7z inside? Open it right in place.

Try a sample
Any size ISO 9660 + UDF No upload
Related Tools
7Z File Viewer CAB File Viewer Archive Viewer EXE Icon Extractor Archive Creator

How to open an ISO file online

  1. Open the ISO. Drop the .iso file anywhere on this page, click to browse or paste it. Even multi-gigabyte images open in a second or two.
  2. Check the disc info. The Archive info tab shows the volume label, dates, file systems and whether the disc is bootable.
  3. Browse and preview. Walk through the folders, sort and search, and click any file to preview it - videos and big files stream straight from the image.
  4. Extract files. Download single files, tick several and get one ZIP, or extract a whole folder - in Chrome and Edge straight to your disk.

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

ISO viewer features

Any size, instantly

Only the directory is read to list the disc, so an 8 GB DVD image opens as fast as a small CD.

Every disc file system

ISO 9660, Joliet (Windows names), Rock Ridge (Linux names, links and permissions) and UDF.

Boot info

See if the disc boots on BIOS, UEFI or both, and extract the El Torito boot images.

Spots broken downloads

If the image is shorter than its header says, you are told - and which files are affected.

Preview without extracting

Text, images, PDFs, audio and video open in a click. Archives on the disc open in place.

100% private

Your disc image is read by your browser. Nothing is uploaded, not even the file list.

ISO file systems, decoded

An ISO is a sector-by-sector copy of a CD, DVD or Blu-ray.

Inside sits a file system - often two or three of them describing the same files.

File systemWhat it addsTypical discs
ISO 9660The 1988 base: short upper-case names like SETUP.EXEEvery CD, as a fallback
JolietLong Unicode names for WindowsSoftware and data CDs
Rock RidgeUnix names, permissions, owners and symbolic linksLinux installers and live ISOs
UDFFiles over 4 GB, big discs and long namesWindows install ISOs, DVDs, Blu-ray

The viewer reads all four and shows the richest one. The Archive info tab lists every file system found and which one you are looking at.

Why big ISOs open instantly

Most online tools load the whole image into memory first, which fails or freezes on a 4 GB DVD.

This viewer works like your operating system does: it reads the small directory of the disc and nothing else.

When you preview or download a file, only that file's sectors are read, straight from your drive - a 3 GB video inside the ISO starts playing at once. Building one ZIP of thousands of files still needs memory, so for whole discs use Extract to folder (Chrome and Edge), which writes each file to your disk as it goes.

Bootable ISOs and the [BOOT] folder

Installer and live ISOs carry an El Torito boot catalog.

It tells a PC which boot image to start - one for old BIOS machines, one for UEFI, or both.

The viewer reads that catalog and shows the boot images in a [BOOT] folder, just like 7-Zip does. You can extract them, for example to inspect a UEFI boot partition.

  • BIOS (x86) - classic PCs and virtual machines in legacy mode.
  • UEFI - every modern PC and Mac with Boot Camp; Secure Boot checks the signed loader inside.

To boot from a USB stick, write the whole ISO with Rufus, Ventoy or balenaEtcher - copying the files over is not enough for most discs.

What people open ISO files for

Linux distributions, Windows installers, old games and software CDs all ship as ISO images.

Often you only need one file from them - a driver, a manual, a font or a config file.

Need the opposite - pack a folder into one file? Use the Archive Creator. Browse all file viewers for other formats.

Frequently Asked Questions

Drop the ISO onto this page. You can browse the disc, preview files and download them right away - no DVD, no virtual drive and no admin rights.

It works on Windows, Mac, Linux and Chromebooks.

There is no practical limit. The viewer reads only the directory of the disc and the files you open, straight from your drive, so a 4 GB or 8 GB DVD image is never loaded into memory.

Building one ZIP of a whole big ISO does need memory, so for that use Extract to folder in Chrome or Edge.

Yes. Windows ISOs keep their files in the UDF file system and put only a small readme in the older ISO 9660 part.

The viewer reads UDF and picks the richer file system automatically, so you see the real setup files, including the large install.wim or install.esd.

Mounting makes your computer treat the ISO like a disc in a drive, which is handy for running an installer. Extracting copies files out of the image so you can keep or edit them.

This viewer extracts - and lets you look inside first, so you only take what you need.

No - a bootable stick needs the whole image written to the USB drive, sector by sector. Use Rufus or Ventoy on Windows, or balenaEtcher on any system.

This viewer tells you whether the ISO is bootable at all, and for BIOS, UEFI or both.

Every ISO stores its own size in its header. If the file is shorter, the viewer warns you and marks the files that fall past the end.

For a full check, compare the SHA-256 checksum listed on the download page with the one your system reports.

No. The image is read by your own browser and never leaves your device.

That is also why big ISOs open so quickly - nothing has to travel over the internet.

Those are other disc and disk image formats. A file that is really an ISO under another name opens here, because the viewer checks the content, not the extension.

Raw BIN/CUE, Nero NRG and Apple DMG images need a desktop tool such as 7-Zip or your operating system.

Guides & Tutorials

All 14 guides
Guide How to Tell What Format an Image File Is (5 Easy Ways) Read the guide Guide How to Open ZIP, RAR, 7Z & TAR.GZ Files Online (Without Installing Anything) Read the guide Comparison PNG vs JPG: Which Image Format Should You Actually Use? Read the guide