For large files, select only the algorithms you need to reduce processing time.
File Checksum is a free online tool for calculating MD5, SHA-1, SHA-256, and SHA-512 checksums for any file. Supports unlimited file size with 100% client-side processing.
What is a File Checksum?
A file checksum is a fixed-size hash value computed from a file's contents using a cryptographic algorithm. Even a single byte change in the file produces a completely different checksum, making it ideal for verifying data integrity. This tool supports MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3, and RIPEMD-160.
Common Use Cases
Download Verification
Verify downloaded files match the publisher's published checksum to confirm no corruption or tampering occurred during transfer.
Backup Integrity
Compare checksums before and after copying files to network storage, optical media, or cloud backups to ensure data fidelity.
How to Calculate a File Checksum
- 1
Select your file
Drag and drop a file onto the drop zone, or click to browse. Multiple files are supported.
- 2
Choose algorithms
Check the hash algorithms you need. For large files, select only what you need to reduce processing time.
- 3
Calculate and compare
Click Calculate. Paste an expected checksum into the comparison field to instantly verify a match.