ISO Converter
Convert files to and from ISO online for free. Fast, secure, and high-quality file conversion with no sign-up or software required.
Maximum file size is 1GB
How it works
Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is an ISO file?
An ISO file, technically known as an ISO 9660 file system image, is a sector-by-sector binary replica of data on an optical disc. Governed by the International Organization for Standardization, this uncompressed archive encapsulates the exact digital structure of a CD, DVD, or Blu-ray, including the file system metadata, boot code headers, and attributes required for software distribution and operating system installation. While originally based on the ISO 9660 standard, modern ISO files often utilize the Universal Disk Format (UDF) specification to support larger file sizes and varying optical media types.
How to open an ISO file
Modern operating systems, including Windows 10/11, macOS, and Linux distributions, possess native kernel support to 'mount' ISO images as virtual drives. In Windows, this is achieved via File Explorer, while macOS uses the DiskImageMounter utility to render the file as a readable volume. For older OS versions lacking native mounting capabilities, or to extract the binary contents without mounting, third-party virtualization software such as WinCDEmu or archival tools like 7-Zip and WinRAR are required to parse the container.
ISO Technical Info
- Full Name
- ISO 9660 Disk Image
- Developed By
- International Organization for Standardization
- Initial Release
- 1988
- MIME Type
- application/x-iso9660-image
Why RunConvert
The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
3,000+ conversions supported
Every popular and niche format covered - video, audio, image, document, archive and more. New formats added regularly.
Fast, cloud-powered
No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
Secure & private
Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.
Free - no account needed
Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.