Convert tools

CRC32 Calculator

Calculate the CRC-32/ISO-HDLC checksum of UTF-8 text.

Convert in your browser · No sign-up

Uses reflected polynomial 0xEDB88320, initial and final XOR 0xFFFFFFFF. CRC detects errors; it is not a cryptographic hash.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Calculate the CRC-32/ISO-HDLC checksum of UTF-8 text.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

123456789 → cbf43926

Details and limitations

Uses reflected polynomial 0xEDB88320, initial and final XOR 0xFFFFFFFF. CRC detects errors; it is not a cryptographic hash.

Text stays in your browser; it is not sent to a conversion server.

FAQ

CRC32 Calculator — What are the supported inputs and limits?

Uses reflected polynomial 0xEDB88320, initial and final XOR 0xFFFFFFFF. CRC detects errors; it is not a cryptographic hash.

Format references

Tool page updated: