offlinewebtools.com — free, watermark-free browser tools that stay on your device with nothing uploading to our servers

File Checksums

Calculate MD5, SHA1, and SHA256 checksums to verify file integrity and detect changes

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Select File for Checksum Calculation

128-bit hash, fast but less secure

160-bit hash, deprecated for security

256-bit hash, recommended for security

Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.