Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
Data Size Converter
Convert between bits, bytes, KB, MB, GB, TB, and PB with binary and decimal units.
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Decimal (SI) vs Binary (IEC)
1 KB = 1,000 B (decimal)
1 KiB = 1,024 B (binary)
1 MB = 1,000 KB (decimal)
1 MiB = 1,024 KiB (binary)
1 GB = 1,000 MB (decimal)
1 GiB = 1,024 MiB (binary)
1 TB = 1,000 GB (decimal)
1 TiB = 1,024 GiB (binary)
What is Data Size Conversion?
Data size conversion allows you to convert between different units of digital information. There are two systems: decimal (SI) units use powers of 1,000, while binary (IEC) units use powers of 1,024.
This tool features:
- Ten data units — Bits, bytes, KB, KiB, MB, MiB, GB, GiB, TB, and TiB.
- Instant conversion — Results update in real-time as you type.
- Binary vs Decimal — Clear distinction between SI and IEC standards.
- Bidirectional — Enter any value and all others update automatically.
How to Use
- Enter a data size — Type a value in any of the ten data size fields.
- View converted values — All other fields update automatically with the converted values.
- Check the reference — The reference section shows the difference between decimal and binary units.
Frequently Asked Questions
What is the difference between KB and KiB?
KB (kilobyte) uses the decimal system where 1 KB = 1,000 bytes. KiB (kibibyte) uses the binary system where 1 KiB = 1,024 bytes. Binary units are more common in computing.
How many bytes are in a gigabyte?
In the decimal system, 1 GB = 1,000,000,000 bytes. In the binary system, 1 GiB = 1,073,741,824 bytes.
Why do hard drives use decimal units?
Manufacturers use decimal units because the numbers appear larger. A "1 TB" drive contains 1,000,000,000,000 bytes, which is about 931 GiB.
Is this tool free to use?
Yes. All processing happens entirely in your browser. No data is sent to any server.
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