File Checksum Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 checksums for any file. Verify file integrity and detect tampering by comparing cryptographic hashes.
Drag & Drop any file here
or
Any file type is accepted
How to Generate File Checksums
- Click "Select File" or drag and drop any file into the upload area above.
- The tool reads your file and computes MD5, SHA-1, SHA-256, and SHA-512 hashes using cryptographic algorithms.
- Copy any checksum with the "Copy" button, or paste an expected hash into the verify section to compare.
Frequently Asked Questions
What is a file checksum?
A checksum (or hash) is a fixed-length string generated from a file's contents using a cryptographic algorithm. Even a tiny change in the file produces a completely different checksum, making it useful for verifying file integrity and detecting corruption or tampering.
Which checksum algorithm should I use?
SHA-256 is the most commonly recommended algorithm for general use. It offers a strong balance of security and performance. SHA-512 provides even more security. MD5 and SHA-1 are included for compatibility but are considered cryptographically weaker.
Are the checksums computed locally?
Yes. All checksum calculations happen entirely in your browser using the Web Crypto API (for SHA algorithms) and a JavaScript implementation (for MD5). Your files are never uploaded to any server.
Can I verify a downloaded file with this tool?
Absolutely. Upload the downloaded file, then paste the checksum provided by the file source into the "Verify Checksum" field. The tool will tell you if they match, confirming the file was not corrupted or tampered with during download.
Is there a file size limit?
There is no strict limit, but very large files (over 2GB) may be slow to process since the entire file must be read into browser memory. For most files, checksum generation is nearly instant.