What is the difference between MB and MiB?
One megabyte uses the decimal definition of 1,000,000 bytes, while one mebibyte uses the binary definition of 1,048,576 bytes.
Formatter
File Size Formatter
Format byte values as KB, MB, GB, KiB, MiB, or GiB. Choose decimal or binary units and process values locally in your browser.
Tool
File Size Formatter
Format byte values as KB, MB, GB, KiB, MiB, or GiB. Choose decimal or binary units and process values locally in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free File Size Formatter to convert raw byte counts into readable file size values. Enter a number of bytes or another supported unit, choose decimal units such as KB and MB or binary units such as KiB and MiB, and control the displayed precision. Processing runs directly in your browser and is useful for storage reports, upload limits, logs, and technical documentation.
Examples
- 1024 bytes → 1 KiB
- 1000000 bytes → 1 MB
- 5368709120 bytes → 5 GiB
Frequently Asked Questions
Can I choose the output unit?
Yes. You can let the tool select a readable unit automatically or choose a specific supported unit.
Does formatting change the actual file size?
No. The tool only converts and formats a numeric size value. It does not compress, resize, or modify a file.
Is my value uploaded?
No. File size conversion and formatting run locally in your browser.
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