Checksum Calculator

Calculate and verify checksums with MD5, SHA-1, CRC-32, and Adler-32.

100% Browser-Based

Files Never Leave Your Device

No Server Uploads

Zero Data Collection

How It Works

Choose Input

Enter text or upload a file to calculate checksums

Select Algorithms

Pick one or more checksum algorithms (MD5, SHA-1, CRC-32, Adler-32)

Calculate or Verify

Generate checksums or verify against an expected value

Features

Multiple Algorithms

MD5, SHA-1, CRC-32, and Adler-32 all in one tool

Verification Mode

Compare computed checksums against expected values with auto-detection

Text & File Support

Calculate checksums from text input or uploaded files

Algorithm Auto-Detection

Automatically detects algorithm from checksum length during verification

Frequently Asked Questions

What is the difference between this and the Hash Generator?

The Hash Generator focuses on SHA-2 family (SHA-256/384/512) for cryptographic security. This tool provides legacy and non-cryptographic checksums (MD5, CRC-32, Adler-32) for file integrity verification.

Is MD5 secure?

MD5 is not recommended for security purposes due to known collision vulnerabilities. However, it remains useful for file integrity checking and non-security checksums.

Related Tools

Hash Generator