File Checksum & Integrity Verifier
Processed in your browser
Compute SHA-256, SHA-512, SHA-384, and SHA-1 cryptographic hashes of local files using the client-side Web Crypto API.
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Click or Drag & Drop File to Verify Checksum
100% Client-side hashing via Web Crypto API. Zero server uploads.
Calculated Cryptographic Hashes
SHA-256 (Recommended)
SHA-512
SHA-1 (Legacy)
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Direct In-Browser Handoff
Data Parsing & Structure Analysis
Chain this tool with complementary private browser utilities for a complete zero-server workflow:
Helpful Examples
Software ISO Verification
Check downloaded OS image against vendor SHA-256
Drop Ubuntu.iso or any installer into the dropzoneHow to Use the File Checksum & Integrity Verifier
Browser-native file hashing and integrity verification tool powered by the Web Cryptography API (crypto.subtle). Drop any local file to instantly compute cryptographic hashes including SHA-256, SHA-512, SHA-384, and legacy SHA-1. Compare against official checksums with instant green/red match verification without uploading a single byte to an external server.
Privacy & Data Processing Notice
No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.
Frequently Asked Questions
Are my files uploaded to any server during hashing?
No. All cryptographic operations run 100% locally inside your browser via the hardware-accelerated Web Crypto API. No files ever leave your device.
Which hash algorithm is recommended for security verification?
SHA-256 is the modern industry standard for software release verification and security signatures. Avoid SHA-1 for cryptographic security as it is prone to collision attacks.
Related Utilities
Frequently paired browser tools in File & Data Tools