Is my file uploaded to a server?

No. All hash calculations happen entirely in your browser using the WebCrypto API. Your file data never leaves your device.

Why is MD5 not supported?

MD5 is not available in the browser's WebCrypto API and is considered cryptographically broken. SHA-256 or SHA-512 should be used for any security-sensitive purpose.

What can I use file hashes for?

File hashes verify integrity — confirming that a downloaded file has not been tampered with or corrupted. Compare the displayed hash against the one published by the file's source.

Is there a file size limit?

There is no hard limit, but very large files may take longer to process. The progress bar shows how far along the computation is.

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File Hash Calculator

Calculate SHA-1, SHA-256, and SHA-512 hashes of any file entirely in your browser.

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About this tool

Drag and drop or browse to upload any file, and the tool calculates its cryptographic hash values using the browser's built-in WebCrypto API — no data ever leaves your device. SHA-1, SHA-256, and SHA-512 are all computed simultaneously. A progress bar tracks large file processing, and each hash can be copied with a single click.

How to use

1 Drag and drop a file onto the drop zone, or click 'Browse' to select a file from your device.
2 File information (name, size, type, last modified) is displayed immediately.
3 Watch the progress bar as the hashes are computed — large files may take a moment.
4 Copy any of the hash values (SHA-1, SHA-256, SHA-512) using the individual copy buttons.

Frequently Asked Questions

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