Security & Cryptography
File Checksum & Hash Generator
Generate cryptographic hashes and verify file integrity in real-time across SHA-256, SHA-512, MD5, SHA-1, and CRC-32 with 100% in-browser WebCrypto.
Length: 23 characters
Checksum Verifier & Matcher
SHA-256256 bits• Industry standard secure cryptographic hash
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SHA-512512 bits• High-security 64-bit word cryptographic hash
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SHA-384384 bits• Truncated SHA-512 variant for SSL/TLS certs
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SHA-1160 bits• Git commit hash standard (legacy use)
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MD5128 bits• Fast file integrity checksum and ETags
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CRC-3232 bits• Zip / Ethernet frame error-detecting code
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About this tool
Comprehensive documentation & audit utility guideCryptographic hashes generate fixed-length digital fingerprints from arbitrary input data. This utility provides client-side calculation of SHA-256, SHA-512, SHA-384, SHA-1, MD5, and CRC-32 checksums for text strings and local files using the native browser WebCrypto API and fast bitwise algorithms. Files are read locally and never transmitted.
How it works
1
Input Text or Upload File
Type or paste text in string mode, or drag-and-drop any local file to compute checksums.
2
Review Hashes
Inspect calculated SHA-256, SHA-512, MD5, SHA-1, and CRC-32 checksums in real-time.
3
Verify & Match Checksum
Paste an expected hash from a software vendor or release page to confirm integrity.
Key Features & Capabilities
NIST Standard SHA-256, SHA-384, and SHA-512 cryptographic hashing via WebCrypto
High-speed pure JavaScript MD5 (RFC 1321) and CRC-32 (IEEE 802.3) calculations
Local file checksum generation using in-memory ArrayBuffers with zero server uploads
Live hash comparison tool with automated match/mismatch verification indicators
Uppercase and lowercase hexadecimal formatting toggles