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Byte Size Humanizer

Turn a byte count into a human-readable size and parse a size string back to bytes.

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bytes

human-readable size

in bytes

— output appears here —

About this tool

Convert raw byte counts to friendly sizes and back, showing both 1024-based (KiB) and 1000-based (KB) units, all in your browser.

What is the difference between KB and KiB?

KB is decimal (1000 bytes) while KiB is binary (1024 bytes); operating systems and drive makers often disagree, so both are shown.

What units can I type to convert back?

Any unit like KB, MB, GB or their binary forms KiB, MiB, GiB — for example 1.5 GB or 700 MiB.