File Size Converter
📦 File Size Converter Source Code $3.99
Get the complete, ready‑to‑deploy HTML file with all styling and logic. This is the exact code powering the demo above — no dependencies, works offline, and 100% client‑side. Supports bytes, KB, MB, GB, TB, PB, EB, ZB, and YB with both binary (1024) and decimal (1000) systems. Perfect for system administrators, developers, and data engineers. One‑time purchase, lifetime access.
What Is a File Size Converter?
System administrators, developers, and data engineers frequently need to convert between different units of digital storage. Whether you're calculating storage requirements, monitoring disk usage, or optimizing file transfers, this tool eliminates manual calculation errors. It supports the full range from bytes up to yottabytes, with both binary (1024) and decimal (1000) systems — essential for understanding the difference between how operating systems report sizes versus how storage manufacturers advertise them.
How to Use
- Enter the file size value in the input field — decimals are supported.
- Select the "From" and "To" units from the dropdowns. Use the Swap button to quickly reverse them.
- Choose your system — Binary (1024) for operating systems and memory, Decimal (1000) for storage manufacturers.
- Click "Convert" — the result appears instantly. Toggle "Show both systems" to see the equivalent size in the alternate system.
Frequently Asked Questions
What's the difference between binary and decimal systems?
Binary system uses powers of 1024 (2¹⁰): 1 KB = 1024 B, 1 MB = 1024 KB. Decimal system uses powers of 1000 (10³): 1 KB = 1000 B, 1 MB = 1000 KB. Operating systems report sizes in binary, while storage manufacturers use decimal — this explains why a "1 TB" drive shows as ~931 GB on your computer.
Does this tool support very large numbers?
Yes. The tool uses JavaScript's BigInt for the underlying calculations and handles numbers up to 2⁵³ safely with double-precision floating point. For extremely large values, it maintains accuracy up to 15 significant digits.
Is my data sent to a server?
No. All conversions happen entirely in your browser. Nothing is ever transmitted or stored.
Disclaimer: This tool performs all operations locally in your browser. No data is stored, transmitted, or logged. Results are provided for informational purposes only.