ToolBirch

File Hash Comparator

Compare two files byte-for-byte via SHA-256.Security & Privacy

File Hash Comparator

Compare two files by their SHA-256 digests — byte-identical files always share a hash, so this catches duplicated or corrupted copies.

About this tool

Two files with identical SHA-256 digests are byte-identical with overwhelming certainty. The cheapest way to verify a copy, a re-download or a suspected duplicate.

How to use the File Hash Comparator tool

  1. Choose both files. Any type or size up to 200 MB each.
  2. Compare. Both digests are computed locally.
  3. Read the verdict. Identical or different, with both hashes shown.

Supported formats

Input

  • Plain text or file input

Output

  • Converted or analysed output

Inputs are validated before anything is processed. Invalid values and unsupported files are rejected with a clear error instead of failing silently.

Frequently asked questions

How certain is identical?

SHA-256 collisions are not practically producible; equal hashes mean equal bytes for every realistic purpose.

Do filenames matter?

No — only the bytes are compared.

Why not compare byte by byte?

Digests are faster to compute and easier to compare, and produce the same verdict.

Privacy

Everything you enter stays in this browser tab. There is no upload endpoint for tool inputs, no account, and no server-side copy of your text or files. Results are produced locally and disappear when you close the page.

No account is required and no file is ever uploaded. See the privacy policy for details about analytics and the limited data this site stores.

Known limitations

  • Both files are read into memory; very large pairs are memory-bound.

Related tools

Other free tools from the same collection.

Password Strength CheckerEstimate password strength from entropy and weak patterns.File Checksum CalculatorSHA digests of a file to verify downloads.HMAC GeneratorKeyed message authentication with WebCrypto HMAC.JWT Signature VerifierCryptographically verify HMAC-signed JWTs.