Sample ISO files
Free ISO test files from 50 KB to 1 GB. Pick a size and download, or type any size you need.
100 KB ISO
3 files inside
500 KB ISO
3 files inside
1 MB ISO
3 files inside
5 MB ISO
Made on your device
10 MB ISO
Made on your device
25 MB ISO
Made on your device
50 MB ISO
Made on your device · saved in pieces
100 MB ISO
Made on your device · saved in pieces
500 MB ISO
Made on your device · saved in pieces
1 GB ISO
Made on your device · saved in pieces
Free for any use, including commercial. Made by this site, with no third-party content and no signup.
What is inside
- An ISO 9660 image with the volume label TOOLXKIT_SAMPLE
- Three files in the root folder: README.TXT, EMPLOYEES.CSV and DATA.BIN
- Plain ISO 9660 with no Joliet or Rock Ridge extensions, so names are upper case
- Each image ends on a 2,048-byte sector boundary, a little under its label
- Hosted from 100 KB to 1 MB; any size from 50 KB to 1 GB is made on your device
Try it with these tools
They run in your browser. The file you downloaded stays on your device.
- File Type Identifier Find out what a file really is by reading its bytes, not its name.
- File Signature Checker Read a file’s magic bytes and catch an extension that is lying.
- File Metadata Viewer See a file’s real type, size, dates and what the browser thinks it is.
- File Hash Generator Work out the MD5, SHA-1 and SHA-256 of a file without uploading it.
- SHA-256 Generator Generate a SHA-256 hash of any text or file, in your browser.
- Checksum Verifier Check a download against the checksum the publisher listed.
About ISO files
An ISO file is a byte-for-byte copy of an optical disc, stored as one file. The name comes from ISO 9660, the file system standard for CD-ROMs. Data is laid out in 2,048-byte sectors, just as it was on the disc.
Operating systems, rescue tools and old software are usually shared as ISO images. Windows, macOS and Linux can all mount one as a virtual drive, and virtual machine software boots from them directly.
The confusion is that an ISO is not a compressed archive. It is a disc copy, so it is as large as the data it holds. The other surprise is that plain ISO 9660 has strict rules for file names, which is why the files in this image have upper-case names.
Sources: ECMA-119, the ISO 9660 file system (Ecma International) · ISO disk image format (Library of Congress)
Questions
Why is there no 10 KB ISO?
An ISO 9660 image reserves its first 16 sectors and needs more for the volume descriptors, path tables and root folder. That fixed part is about 43 KB before any file is added, so a 10 KB ISO cannot exist.
Can I boot from this ISO?
No. It holds three data files and no boot record. Use it to test mounting, file listing, uploads and checksums.
How do I open it?
Double-click it on Windows 10 or later or on macOS to mount it as a drive. On Linux, mount it with mount -o loop, or open it with 7-Zip on any system.
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For developers: exact bytes and SHA-256
Sizes are decimal (1 MB = 1,000,000 bytes). The hosted files never change between builds, so these checksums stay valid.
| File | Bytes | SHA-256 |
|---|---|---|
| sample-100kb.iso | 98,304 bytes | e6d2a3f1a162f3b737ad1d0d0483723d428924935500614dd37f8bd6dd052428 |
| sample-500kb.iso | 499,712 bytes | f4f4863e1e8421e1c9ec28f3300b5990afc9b3bcf97ef0608c39987ad96ce34c |
| sample-1mb.iso | 999,424 bytes | 2a8375fa247dfcec758f3b98dcd54c45fc6fa89b03394074cd42ce3900828f13 |