Bratora
File Size Calculator
Check the exact size of any file before you upload or share it.
Privacy: This tool runs in your browser. Your input is not uploaded to Bratora for processing.
File size is calculated in your browser. The file is not uploaded to the server.
File size
Visual guide
How to use this tool
File Size Calculator — 3 quick steps
- 1 Enter your input Paste text, JSON, a URL, or pick options in the form.
- 2 Run the tool Click Format, Generate, Encode, or the main action button.
- 3 Copy the result Copy or download the output — nothing is stored on our servers for client tools.
Reads the selected file’s size metadata in the browser.
Step-by-step
Choose any file.
Read bytes, KB, and MB instantly.
Good for
- Checking upload limits
- Comparing compressed outputs
Worth knowing
Format: Any file type.
Limits: Does not upload or analyze file contents beyond size/type metadata exposed by the browser.
FAQ
Is the file uploaded?
No. Size is read locally from the File object.
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