CRC32 Calculator & Verifier Online

Compute CRC-32 checksums locally in your browser. Supports text input and chunked file processing for large files, multiple output formats, verification & progress reporting.

Live:

Characters: 0

CRC will appear here…
HEX
—
DEC
—
Base64
—

About CRC-32

What is CRC-32?

CRC-32 (Cyclic Redundancy Check, 32-bit) is a checksum algorithm commonly used for error-detection in networks and storage. It is not cryptographically secure and should not be used for authentication.

Outputs

  • • 32-bit checksum (4 bytes)
  • • Representations: 8-char HEX, unsigned decimal, or Base64
  • • Deterministic & fast

Use Cases & Limits

CRC-32 is ideal for integrity checks and detecting accidental data corruption. It is not collision-resistant for adversarial use and must not be used as a cryptographic hash.

Advanced Features in this Tool

  • • Chunked file processing (4MB chunks) to support large files
  • • Live hashing toggle
  • • Multiple output formats
  • • Progress bar, pause/resume & cancel
  • • Timing-safe verification