Decrypt a File
Unlock a file that was encrypted with KIVO, using the password it was locked with.
What it does
Decrypt a File uses the cryptography built into your browser (WebCrypto) — the same standard algorithms your bank's site uses — on a file or a piece of text that never leaves this page.
When you need it
Before sending something sensitive by email or chat, when a file you received must be checked, or when you want to know whether a password or a signature holds up.
Limits and caveats
A strong algorithm is only as safe as the password or certificate behind it, and some checks — whether a certificate was revoked, say — need the issuer's servers, which the page says where it matters. Nothing is stored or logged. Everything happens in your browser, so the file never leaves your device.
How to decrypt a file
- Drop or choose your KIVO file.
- KIVO processes it instantly — no waiting for uploads.
- Download the result. That's it.
Everything happens on this device: no file is uploaded and nothing leaves the browser.
Frequently asked questions
- It says the password is wrong but I'm sure it isn't.
- Then the file was altered in transit — the two are deliberately indistinguishable. AES-GCM authenticates as well as encrypts, so any change to a single byte makes it refuse to open rather than hand back damaged data. Ask for the file again.
- Does the password go anywhere?
- No. The decryption happens in this tab; the password never leaves the page and there is nothing here to send it to.
- Do my files get uploaded?
- No. This tool runs entirely in your browser, so the file never leaves your device.