A set of dummy BIN files in fixed sizes from 1 KB to 5 GB. MIME type: application/octet-stream.

Pick a size, download, and run the same checks you would with a real BIN — uploads, parsers, viewers.

Can I use it commercially?

Yes. Dummy files from DummyFiles.dev are free to use in commercial projects, tests and CI. They contain no third-party copyrighted content.

How was it generated?

The file is generated on download with a target size of BIN. No account is required.

Yes. Open the BIN page for every size from 1 KB to 5 GB.

All BIN sizes

Download dummy files by size when you only need bytes — test file with no specific document format.

Go to generator

This is a valid BIN of the stated size, generated for testing — not a finished document.

What is this file?: A set of dummy BIN files in fixed sizes from 1 KB to 5 GB. MIME type: application/octet-stream.
How can I use it?: Pick a size, download, and run the same checks you would with a real BIN — uploads, parsers, viewers.
Can I use it commercially?: Yes. Dummy files from DummyFiles.dev are free to use in commercial projects, tests and CI. They contain no third-party copyrighted content.
How was it generated?: The file is generated on download with a target size of BIN. No account is required.
Are larger files available?: Yes. Open the BIN page for every size from 1 KB to 5 GB.