Online Checksum Verifier & File Hash Calculator (SHA-256 / SHA-512)
Verify File Integrity with SHA-256 / SHA-512 Hashes. Compute SHA-256, SHA-512, SHA-384, and SHA-1 cryptographic file hashes locally to verify file integrity and detect tampering.
What is Checksum Verifier and what does it do?
The Hash & Checksum Verifier is a cryptographic integrity tool that computes SHA-256, SHA-512, SHA-384, and SHA-1 hashes directly in your browser using hardware-accelerated WebCrypto.
Verify downloaded disk images, executables, backups, and software archives against official release checksums to detect data corruption or unauthorized tampering.
- Compute SHA-256, SHA-512, SHA-384, and SHA-1 hashes in parallel.
- Compare calculated hashes against official checksum strings automatically.
- Copy individual hashes to clipboard with single-click actions.
- Verify files of any size with zero server uploads.
How does Checksum Verifier work?
Streams file buffers into the browser's native crypto.subtle.digest API, computing SHA-family cryptographic digests with native hardware acceleration.
100% private: all processing happens locally in your browser using client-side WebAssembly, WebCrypto, WebAudio, and HTML5 Canvas. Your files are never uploaded to any server.
Who needs Checksum Verifier?
System Administrators & DevOps
Verify ISO images, server firmware, and container downloads before production deployment.
Security Engineers
Audit file integrity and confirm forensic match against known malware or good hashes.
Supported file formats
Hash & Checksum Verifier opens and processes the following file extensions directly in your browser:
All files.iso.zip.exe.tar.binHow to use Checksum Verifier — step by step
- 1
Select Any File
Drop your file or download package into the tool.
- 2
Compute Hashes
WebCrypto generates SHA-256, SHA-512, SHA-384, and SHA-1 hashes instantly.
- 3
Compare Hash
Paste the author's checksum to verify an exact cryptographic match.
Frequently asked questions
Is there a file size limit?
It supports multi-gigabyte files thanks to streaming WebCrypto hardware acceleration.
Does the file leave my computer?
Never. Hashes are computed strictly in your browser sandbox without network transmissions.
More free tools you might like
- Zip & Archive Unpacker Engine
- Log File & Console Viewer (.log)
- INI & Configuration File Viewer (.ini, .cfg, .conf)
- TAR & TAR.GZ Archive Inspector (.tar, .tgz)
- SQL Schema & Query Studio (.sql)
- HAR Network Capture & Waterfall Viewer (.har)
Browse the full collection in the Plugin Store — every tool is free, private, and runs entirely in your browser.