Domos Digital

Practical guides / Security & identity

Compare SHA checksums for text and files

A SHA checksum provides a compact fingerprint of bytes. Compare against a trusted expected value to detect changes, while remembering that a matching hash does not itself identify the publisher.

How to use the workspace

  1. Choose text or a local file and select SHA-256, SHA-384 or SHA-512.
  2. For text, explicitly choose UTF-8 or hex. For files, select a file within the 250 MiB limit.
  3. Run, watch progress and cancel if needed. Copy the exact digest for comparison.

A concrete starting point

Same text with a trailing newline = different bytes = different digest
SHA-256 output: 64 hexadecimal characters
SHA-512 output: 128 hexadecimal characters

The workspace reports byte length to help catch an unexpected newline, encoding or file choice.

Read the result carefully

File hashing reads bounded chunks in a worker, keeping the UI responsive and avoiding a full buffered upload. The selected algorithms operate on the same input bytes. Cancellation terminates the worker and produces no accepted checksum for that run.

Common mistakes to avoid

  • Get the expected checksum from a trusted source; a compromised download page could replace both file and digest.
  • Text encoding and whitespace affect the digest.
  • These SHA functions are not a password-storage scheme.

Limits & privacy

Files up to 250 MiB with 1 MiB chunks and a 120-second worker deadline. Text up to 1 MiB. Files never leave the browser through this tool.

Local: processed in this browser

Inputs stay in browser memory. Saving or downloading is an explicit action; there is no automatic input history.

Read the full privacy boundaries
Open SHA Checksums →