FileTools

File checksum

Calculate SHA-256, SHA-384, or SHA-512 locally.

How it works

  • Choose or drop your files
  • Select “Calculate checksum” and let your browser process it
  • Review the result and download it to your device

Why use FileTools for file checksum?

A checksum is a deterministic fingerprint calculated from file bytes. Comparing the result with a value published by a trusted source can reveal an incomplete or altered download.

Best suited for

Verifying software downloads, comparing file copies, checking transfers, and documenting file integrity.

Input and output

Input: Any local file plus SHA-256, SHA-384, or SHA-512.

Output: A hexadecimal digest that can be copied and compared.

Known limitation

A matching hash proves byte equality with the reference, not that the reference itself is trustworthy or safe.

Practical tips

  • SHA-256 is the most commonly published option for ordinary download verification.
  • Compare every character and obtain the expected hash from a trusted channel separate from the file when possible.