File Size Converter
Convert file-size units with an explicit decimal (1000) or binary (1024) base.
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How it works
Convert file-size units with an explicit decimal (1000) or binary (1024) base. Enter your values or try the example. Run the action, check the result and copy or download it. Your input remains editable after an error.
Example
1 MB → 1000 kB 1 MiB → 1024 KiB
When to use this tool
Compare an attachment’s size with an upload limit, checking which unit base each uses.
Supported formats & limits
Decimal units use powers of 1000; binary units use powers of 1024 and are labeled KiB, MiB and GiB. Results are rounded to 12 significant digits. This changes units, not the file itself.
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What happens when I change the input?
An edited input needs a new result. Run the action again; previous download links are removed so you cannot mistake an old output for the current one.
Are my files uploaded?
Your files and pasted content are processed in temporary browser memory and are not uploaded for processing. App preferences store only tool IDs, language and theme. There are no accounts, ads or automatic error reports. Closing the page discards your workspace; download results you want to keep. Production pages use Google Analytics for visit statistics; see the Privacy page for details.