Free Online File Checksum Calculator
Calculate MD5, SHA-1, SHA-256, and SHA-512 checksums for any file with HubKit's file checksum tool. Verify file integrity after downloads, compare file versions, or generate hashes for security audits — all without uploading your file to any server.
How to Use
Drop a file onto the upload area or click to browse. The tool computes all four checksums (MD5, SHA-1, SHA-256, SHA-512) locally in your browser. Compare the results with the expected hash to verify file integrity.
Features
- Calculate MD5, SHA-1, SHA-256, and SHA-512 file checksums
- Drag-and-drop file selection
- File never leaves your browser — local processing only
- Verify downloads and detect file tampering
Frequently Asked Questions
Why should I verify file checksums?
Checksums confirm that a downloaded file has not been corrupted during transfer or tampered with. Software vendors publish checksums so you can verify you received the authentic, unmodified file.
Is my file uploaded to a server?
No. The file is read and hashed entirely in your browser using the Web Crypto API. It never leaves your device, making it safe for sensitive files.
How long does it take to hash a large file?
Speed depends on your device. Most files under 100 MB are hashed in seconds. Very large files (1 GB+) may take 10–30 seconds depending on your hardware.