File Checksum Verifier
Drop files and check them against a checksum list, or just compute their MD5, SHA-1, SHA-256, SHA-512 and CRC-32 digests. Everything is read chunk by chunk straight from your disk — no file ever leaves this browser tab.
Drop files here
or from your device
MD5 and CRC-32 stream with flat memory; SHA-1/256/512 buffer the file (max 1.40 GB). Up to 40 files per run.
Accepts hash filename, BSD style SHA256 (file) = hash, and bare hashes. Lines starting with # are ignored.
About this tool
File Checksum Verifier computes MD5 (implemented here, because Web Crypto has no MD5), CRC-32, and SHA-1 / SHA-256 / SHA-512 (Web Crypto) directly from files you drop on the page, matching them against a pasted checksum list in GNU, BSD or bare-hash form. MD5 and CRC-32 stream in 64 KB chunks with constant memory; the SHA digests must buffer the file, so files larger than 1.40 GB are refused rather than freezing the tab. Nothing is uploaded and nothing is stored — closing the tab clears everything.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is File Checksum Verifier really free?
Yes. File Checksum Verifier is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does File Checksum Verifier upload my data?
No. File Checksum Verifier runs entirely inside your browser, so anything you type, paste, or open stays on your own device.
Do I need to sign up or install anything?
Neither. There is no account and nothing to download — open the page and File Checksum Verifier is ready to use on desktop or mobile.
Does File Checksum Verifier work offline?
Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.
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