Filesize Formatter Demos

Format byte values as readable kB, MB, KiB, and MiB labels with filesize.js. Supports SI, IEC, JEDEC, locale formatting, and npm setup.

Input

Bytes Accepts numbers, numeric strings, scientific notation, negative values, and BigInt-sized integers.

Standard

Base

Output

Rounding

Round: 2

Precision: 0

Locale

Forced exponent

Decimal separator

Spacer

Bits Pad decimals Full unit names Custom symbol

Case	Options	Result

Preconfigured functions created with partial().

Invalid values and unsupported rounding methods return typed errors.