Verify File Integrity with MD5, SHA-256 & SHA-512
Drop a file below to instantly calculate its checksums using multiple hash algorithms. Everything runs locally in your browser -- your files are never uploaded.
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Your file is processed locally and never uploaded to any server.
Paste an expected checksum below to compare it against the calculated values.
A checksum is a hash value computed from a file's contents using algorithms like MD5, SHA-256, or SHA-512. Checksums serve as digital fingerprints -- if even a single byte of a file changes, the checksum will be completely different. This makes them essential for verifying that downloaded files have not been corrupted during transfer or tampered with by a third party.
Software publishers commonly provide SHA-256 checksums alongside their downloads. After downloading a file, you can use this tool to calculate its checksum and compare it against the published value. If the checksums match, the file is identical to what the publisher released. If they differ, the file may be corrupted or compromised and should not be trusted.
This checksum calculator uses the Web Crypto API built into your browser for SHA-256 and SHA-512, and CryptoJS for MD5. All processing happens locally on your device -- your files are never transmitted over the internet, making this tool safe for verifying sensitive downloads like security software, firmware updates, and system images.
Need to hash text instead of files? Use our hash generator. Want to learn more about how hashing works? Read our guide on what is hashing or our MD5 vs SHA-256 comparison.
A file checksum is a fixed-length string generated by running a file through a hash algorithm like MD5, SHA-256, or SHA-512. It acts as a digital fingerprint for the file. If even a single byte of the file changes, the checksum will be completely different, making it easy to detect corruption or tampering.
No. This checksum calculator processes your file entirely within your browser using JavaScript and the Web Crypto API. Your file never leaves your device and no data is transmitted to any server, ensuring complete privacy and security.
First, obtain the expected checksum from the file's publisher or download page. Then, drop your downloaded file into the checksum calculator to generate its hash. Finally, paste the expected checksum into the verification field. The tool will instantly tell you if the checksums match, confirming the file has not been altered.
For security-critical verification, use SHA-256 as it is the current industry standard with no known vulnerabilities. SHA-512 offers an even longer hash for extra assurance. MD5 is faster but should only be used for quick integrity checks in trusted environments, as it has known collision vulnerabilities.