File Checksum Calculator
Use this free online File Checksum Calculator to calculate MD5, SHA1 and SHA256 checksums of a file. It works instantly in your browser, and your data never leaves your device.
About the File Checksum Calculator
Verify downloads by comparing their checksum with the one published by the developer. The file is read locally and never uploaded.
Also known as: file hash, checksum calculator.
How to use the File Checksum Calculator
- Click "Choose a file" or drag and drop your file onto the box.
- Adjust the options if you need to. The result updates automatically.
- Preview the result and click Download to save it.
Features
- Free with no signup and no daily limits
- Private: runs entirely in your browser
- Works on mobile, tablet and desktop
- Drag and drop support
- No upload, so even large files stay on your device
- Clean, fast interface with no popups
Frequently asked questions
Is the File Checksum Calculator free to use?
Yes. The File Checksum Calculator is completely free with no signup, no limits on normal use and no watermark.
Is my data safe?
Yes. Everything is processed by JavaScript inside your own browser. Your files are never uploaded to our server or stored anywhere.
Can a hash be reversed?
No. Hash functions are one way. The same input always gives the same hash, but you cannot get the input back from the hash.
What else is this tool called?
People also search for it as file hash, checksum calculator. It is the same free tool.