Input and result
Use ANY input to produce an on-screen result. Check a selected file's exact byte count plus readable kilobyte and megabyte values. The result appears instantly without changing or uploading the file.
All toolsFile Size Checker · Free online tool
File Size Checker online
Check a selected file's exact byte count plus readable kilobyte and megabyte values. The result appears instantly without changing or uploading the file.
Local processingNo uploadNo watermark
Browser processing ready
Three simple steps
How to use the File Size Checker tool
No software, signup or hand-holding required.
01
Enter your data
Paste the text or structured data you want to process.
02
Adjust and process
Choose useful settings, then let your browser create the result.
03
Review the details
See the result without sending your data anywhere.
What to expect
A focused File Size Checker workflow
Practical limitation
The current workspace accepts up to 1 file, with a 100 MB limit per file.
Common questions
Good to know
Answers specific to this tool and its current capabilities.
Why are file sizes shown in several units?+
Bytes provide the exact value, while kilobytes and megabytes make larger sizes easier to interpret.
Why does my operating system show a different file size?+
Some systems use binary units while others use decimal units, and disk allocation size can also differ.
Does checking a file size modify the file?+
No. The tool reads the browser's file metadata and leaves the selected file unchanged.