How do I verify a downloaded file matches its published checksum?

Hash the downloaded file here, then paste the checksum the publisher provided into the "Compare to expected hash" box. It's checked against all four computed hashes and tells you immediately whether it matches.

Why do the same input and algorithm always produce the same hash?

Hashing is deterministic — the same bytes always produce the same output for a given algorithm. That's exactly what makes hashes useful for verifying that a file or piece of text hasn't changed.

Is there a file size limit?

No hard limit is enforced, but very large files are read entirely into memory to be hashed, so extremely large files may be slow or strain your browser's available memory.

Is the hash generator free?

Yes, with no account required and no limit on how many times you can use it.

Hash Generator Online

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Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or a file — entirely in your browser.

✓ Never uploaded — processed in your browser

Text

Never uploaded

Hashing happens entirely in your browser using the Web Crypto API — nothing is sent to our servers.

Verify integrity

Compare a computed hash against a published checksum to confirm a file wasn't corrupted or tampered with.

Free, no limit

No account, and no limit on how many times you can use it.

What Is a Hash Generator?

A hash generator runs text or a file through a cryptographic hash function — an algorithm that turns any input into a fixed-length string of characters, called a hash or digest. The same input always produces the same hash, and changing even a single byte produces a completely different one, which is what makes hashes useful for verifying that a file or piece of text hasn't been altered.

How to Generate a Hash Online

Choose Text or File. Paste text directly, or switch to the File tab and choose (or drag in) a file.
Read the hashes. SHA-1, SHA-256, SHA-384, and SHA-512 are all computed and shown at once.
Copy what you need. Each hash has its own Copy button.
Verify a checksum (optional). Paste a published hash into "Compare to expected hash" to confirm it matches.

Frequently Asked Questions

What hash algorithms does this tool support?

SHA-1, SHA-256, SHA-384, and SHA-512, computed with your browser's built-in Web Crypto API.

Why isn't MD5 supported?

MD5 is cryptographically broken and isn't implemented by the Web Crypto API this tool relies on.

Can I hash a file instead of text?

Yes — switch to the File tab. The file is hashed directly in your browser and never uploaded.

Is my text or file uploaded to CurePDF's servers?

No. Hashing runs entirely client-side — nothing you type or upload here ever leaves your browser.

Generate a hash now