ISO Converter
FileFlip converts ISO files into 11 other formats entirely inside your browser, using libarchive compiled to WebAssembly. The ISO file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. There is no file-size limit and no account to create.
How do I convert an ISO file?#
- Drop your ISO file onto the converter at the top of this page, or click it to pick one from your computer.
- Choose the format you want out of it. FileFlip downloads the engine that conversion needs, once, and your browser caches it.
- Conversion starts the moment you pick the format, and the result is yours to download. The work happens in this tab, so nothing is uploaded and nothing is queued.
Is it safe to convert ISO files online?#
Yes, because nothing is uploaded. FileFlip converts ISO files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What happens to a ISO file#
FileFlip converts ISO into 11 formats with libarchive, all of it inside the browser tab. Each conversion below names the engine it uses, what it downloads, and exactly what that conversion keeps or drops.
| Category | Archives |
|---|---|
| File extension | .iso |
| FileFlip support | Read only, so it is a source rather than a target |
| Conversions available | 11 |
| Engines | libarchive |
| Downloaded to your browser | 1.0 MB on the first conversion, then cached |
What is an ISO file?#
An ISO file is a byte-for-byte image of an optical disc's contents, laid out as an ISO 9660 filesystem that a computer can mount or burn as if it were the physical disc.
Use an ISO when a set of files needs to behave like a disc, most commonly to distribute or boot an operating system installer.
Convert an ISO to a plain archive like ZIP when only the files inside are needed and nothing about them has to boot or be mounted as a disc.
The ISO file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
ISO questions people ask#
How do I open an ISO file?
Windows and macOS both mount an ISO as a virtual disc when you double-click it, after which its files show up like any other drive. On Linux, mounting it with the loop option or opening it in an archive manager works the same way.
Do I need to burn an ISO to a disc to use it?
No. Most ISOs today are Windows or Linux installers meant to be written to a USB drive or booted directly in a virtual machine, and optical drives are rare enough that burning one to a physical disc is now the unusual case.
What's the difference between an ISO and a ZIP file?
An ISO reproduces an entire disc's filesystem, including its boot sector and volume structure, which is why an operating system can boot from one. A ZIP is just a bundle of compressed files with no disc structure or boot capability at all.
Why are ISO filenames sometimes truncated or in all caps?
The base ISO 9660 standard only allows 8.3-style uppercase filenames, a limit inherited from CD-ROM's earliest days. Practically every modern ISO adds the Joliet or Rock Ridge extensions to carry long, mixed-case names alongside the restricted ones, so most tools never show the truncated version.
Can I extract just one file from an ISO without mounting it?
Yes. Archive tools like 7-Zip and WinRAR open an ISO the same way they open a ZIP, letting you browse and pull out individual files without mounting the image as a drive.