freeonlinetools

File Checksum Calculator

Calculate MD5, SHA-1, and SHA-256 checksums

Drop a file here or click to select

What is File Checksum Calculator?

A file checksum calculator generates cryptographic hash values (MD5, SHA-1, SHA-256) for any file. Use it to verify file integrity after downloads, detect tampering, or compare two files. Everything runs locally — your files never leave your device.

How to use

  1. Drop a file or click to select one from your device.
  2. View the computed MD5, SHA-1, and SHA-256 checksums instantly.
  3. Paste a known checksum to verify it matches, or copy any hash to share.

Result

After downloading a Linux ISO, paste the SHA-256 from the website into the verify field. A green check confirms the file wasn't corrupted during download.

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