Hash Checksum
Hash Checksum
Generate SHA-256/SHA-512/SHA-1 hashes for text or files. Compare with expected checksums to quickly verify file integrity. No file size limit.
Hash ChecksumChoose mode: Text or FileEnter text or drop a file to verifySelect hash algorithm (default: SHA-256)Click "Compute" to generate the checksumOptional: Paste expected value to compare
Quick Start
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Common Scenarios
Download verification
Compare with official checksum to confirm file integrity
Backup validation
Compare hashes before and after to ensure data integrity
API signing
Generate request digests for API authentication
Deduplication
Quickly detect identical files via hash comparison
Usage Advice
Use SHA-256 for daily verification—good balance of security and performance
Use SHA-512 for high-security scenarios—stronger collision resistance
SHA-1 is for legacy compatibility only—not recommended for new use cases
Watch case sensitivity: Official checksums are often lowercase; switch output format to match
Limitations & Compatibility
Requires WebCrypto API—modern browsers only
Large files use stream processing; memory-safe but slower for GB-scale files
SHA-1 has known collision vulnerabilities—use only for legacy compatibility
Privacy & Security
All processing happens in your browser—data never leaves your device
FAQ
Check if the file downloaded completely, wasn't modified by antivirus, or try re-extracting; also confirm algorithm and case match
No limit—stream reading prevents memory overflow; GB-scale files may take seconds to minutes