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 Checksum
🚀 Quick Start
- Choose mode: Text or File
- Enter text or drop a file to verify
- Select hash algorithm (default: SHA-256)
- Click "Compute" to generate the checksum
- Optional: Paste expected value to compare
📌 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
What if the hash doesn't match?
Check if the file downloaded completely, wasn't modified by antivirus, or try re-extracting; also confirm algorithm and case match
What's the maximum file size?
No limit—stream reading prevents memory overflow; GB-scale files may take seconds to minutes