File Integrity Checker - Free Online Tool | PivaBox

Calculate and verify file checksums — MD5, SHA-1, SHA-256, SHA-384, SHA-512, CRC32

How to Use Checksum Verifier

1. Upload or drag and drop one or more files onto the upload area
2. Select a hash algorithm — MD5, SHA-1, SHA-256, SHA-384, SHA-512, or CRC32. The hash is automatically calculated for each file
3. To verify file integrity, paste the expected hash value into the verify field and click Verify. A green checkmark indicates a match, a red cross indicates a mismatch

Frequently Asked Questions

Is Checksum Verifier free?

Yes, PivaBox Checksum Verifier is completely free to use. There are no charges, subscriptions, or hidden fees.

Are my files uploaded to a server?

No. All hash computation happens entirely in your browser using the Web Crypto API. Your files never leave your device.

Which hash algorithm should I use?

For security verification, SHA-256 is the recommended choice — it is cryptographically secure and widely supported. SHA-512 offers even stronger security but produces longer hashes. MD5 and SHA-1 are fast but considered cryptographically broken and should only be used for non-security checksum verification (e.g., checking file corruption during download). CRC32 is useful for quick integrity checks and is commonly used in ZIP files and network protocols.