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File Size Converter

Convert between bytes, KB, MB, GB, TB, and more in SI (decimal, powers of 1000) or IEC (binary, powers of 1024) notation.

Converted values

Click any row to copy

Exact bytes: 1,000,000 B

SI vs IEC: Hard drives are labeled in SI (1 GB = 1,000,000,000 bytes). Operating systems typically use IEC (1 GiB = 1,073,741,824 bytes), which is why a “1 GB” drive shows as ~0.93 GB in Windows or Linux.
  • 100% free — no account needed
  • Runs in your browser
  • Nothing is uploaded

Frequently asked questions

Is File Size Converter really free?

Yes. File Size Converter is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.

Does File Size Converter upload my data?

No. File Size Converter runs entirely inside your browser, so anything you type, paste, or open stays on your own device.

Do I need to sign up or install anything?

Neither. There is no account and nothing to download — open the page and File Size Converter is ready to use on desktop or mobile.

Does File Size Converter work offline?

Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.

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