Skip to content
/crypto local tool
Suggest an improvement

File Checksum

Verify local artifacts with cancellable SHA hashing, expected digests and portable checksum manifests.

Local execution receiptinput path disclosedTool content stays out of MonoTools URLs and API requests.
Working input
Browser memory
Cross-tool handoff
Session only · 10 min
URL payload
Never
Export
Explicit action

Verify it: open DevTools Network, clear the log, use the tool, then inspect fetch/XHR requests. Page assets and optional aggregate analytics may use the network; tool input is not included.

Full privacy model
Loading tool...
01

How to use

  1. 01Choose native, streaming or automatic mode and one or more SHA algorithms.
  2. 02Select a local file, monitor bytes, elapsed time and throughput, or cancel between chunks.
  3. 03Compare an expected digest or imported manifest, then copy or download the generated manifest.
02

FAQ

Are files uploaded to a server?
No. The browser reads the file locally and computes hashes with Web Crypto.
Can it hash very large files?
Yes. Auto mode uses native Web Crypto up to 512 MiB, then switches to a cancellable 16 MiB streaming path. Browser and device storage limits still apply.
03

Related tools