Enter a value in any unit and see the conversion to all other file size units instantly. Toggle between SI (KB, MB, GB — base 1000) and IEC (KiB, MiB, GiB — base 1024) standards. Click any result to copy it.
Once you know the exact byte count you need, the Sample File Generator lets you create a valid test file at that precise size — PNG, PDF, ZIP, CSV, and 16 other formats, entirely in your browser.