MD5 File Hash Generator

What is MD5?

MD5 is a cryptographic hash function that produces a fixed-size hash value from variable-length input data. It's part of the MD (Message Digest) family and produces a 128-bit hash value. Originally designed for digital signature applications. This tool allows you to upload files and calculate their MD5 hash for verification and integrity checking.

How to Use MD5

1. Click "Select File" or drag and drop your file into the upload area. 2. The MD5 hash will be calculated automatically. 3. Copy the resulting hash value for verification or storage. All processing happens locally in your browser - no files are uploaded to any server.

When to Use MD5

Use MD5 only for legacy system compatibility or non-security purposes. For security applications, always use modern alternatives like SHA-256 or SHA-3.

How MD5 Works

MD5 processes data in 512-bit blocks through a series of rounds with different shift amounts and constants, producing a 128-bit output. The file is read in chunks and processed incrementally to handle large files efficiently without loading the entire file into memory.

Common Use Cases

• Legacy system compatibility
• Non-security checksums
• Educational purposes