More free privacy tools
Same quality bar. Still free. Still no upload.
Your files never leave your device
Free to use, with no account, no usage limit and no watermark, because the work runs on your device rather than on our servers.
This is not a promise about how carefully we handle your upload. There is no upload. The file you choose is read into memory by your own browser, processed there, and handed back as a download — the tool has no server component and makes no network request with your data.
- Nothing is stored. We never receive the file, so there is no copy to retain, no retention period to disclose, and nothing to delete on request.
- Nothing is transmitted. No upload endpoint, no analytics payload carrying file contents, no third-party processor.
- You can verify it. Load this page, disconnect from the internet, and use the tool. It still works, because everything it needs is already on your machine.
- Nothing persists after you close the tab. Files are held in page memory only — not in local storage, not in a cache, not in a database.
A note on wording, because it matters: we do not describe these tools as “encrypted.” Encryption protects data that travels to somebody else's computer. Your file does not travel, so there is nothing to encrypt and nothing to intercept — which is a stronger guarantee than encryption, not a weaker one. The page itself is served over HTTPS like the rest of the site.
This makes the tools safe for material you are contractually barred from uploading to third-party services — client footage under NDA, unreleased campaign assets, anything covered by a confidentiality clause.
How it works
1. Drop any file
Any type up to 400 MB, read into memory in this tab.
2. Get the hashes
SHA-256 and SHA-1 are computed with the browser's Web Crypto.
3. Copy and compare
Copy the hex digest and check it against the one the sender published.
Questions
Two files look the same. Why are the hashes different?
A hash is of the bytes, not of how the file looks. Re-saving a JPEG, exporting a PDF, or even a different line ending in a text file changes the bytes. 'Looks the same' is not 'is the same file'. If you need identity, compare hashes, not screenshots.
Should I still use SHA-1?
Only to check against a SHA-1 someone already published. Chosen-prefix collisions for SHA-1 are practical, so it is the wrong primitive for a new manifest. SHA-256 is the one to quote.
Which algorithms does it use, and is there a size limit?
SHA-256 and SHA-1, both at once, using the browser's built-in Web Crypto. Files can be up to 400 MB, because the whole file is read into memory to hash it. MD5 is not offered.
Related tools
Stay in the same job cluster. Free tools stay on-device; paid tools are labelled as such.
These rearrange files. Versely makes new ones.
Everything on this page works on a file you already have, which is why it costs nothing. Generating something that did not exist (video from a prompt, a voice, a score) runs a model, and that costs credits.