Data Size Converter
Convert a data size between bytes, KB/MB/GB/TB (decimal) and KiB/MiB/GiB/TiB (binary), plus bits. Calculated in your browser.
- Runs entirely in your browser
- No sign-up, no watermark
- Free and unlimited
🔒 Your file stays on your device
How to use Data Size Converter
- 1
Open Data Size Converter and fill in the fields.
- 2
Pick any options that apply.
- 3
Read the result straight away — it recalculates as you type.
What you get
- Decimal (×1000) and binary (×1024) units
- Bytes and bits
- Shows the conversion rate
What happens to your files
This tool runs entirely in your browser. The file you choose is read into memory, processed on your device, and offered back as a download. Nothing is uploaded and nothing is kept once you leave the page.
There is no account, no email, no watermark and no daily limit. Come back whenever you need it.
Frequently asked questions
- Why is 1 GB not the same as 1 GiB?
- 1 GB is 1,000,000,000 bytes (decimal, SI). 1 GiB is 1,073,741,824 bytes (2³⁰). Storage is usually sold in GB; operating systems often report GiB.