SHA256 checksum
Calculate SHA-256 checksums of files or text with Web Crypto in your browser. No file uploading.
No uploads. No account. Free to use.
Drop a file
Nothing is uploaded. Processing stays on this device.
- Files never leave your device
- Runs entirely in your browser
- No signup required
- Free
What is sha256 checksum?
SHA-256 checksums use the Web Crypto API on a file or string and print a hex digest.
How to use it
- Drop a file or paste text.
- SHA-256 is computed with the Web Crypto API.
- Compare the hex digest to a known checksum.
When to use it
Verify a download against a published hash without uploading the binary to a “checksum website.”
Frequently asked questions
Are my files uploaded?
No. This tool runs in your browser. Files and text stay on your device and are not sent to our servers.
Does this use AI?
No. It is a deterministic utility. There is no model and no third-party processing of your data.
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