A ZIP, RAR, or 7z archive you own
Archive passwords are almost always something that was handed to you rather than something you invented — which means recovery is usually a matter of tracking down where it was written, not defeating the file.
Encrypted archives (a password-protected .zip, .rar, or .7z) genuinely encrypt their contents. As with encrypted PDFs and Office files, there's no supported shortcut through modern archive encryption — so this guide is about locating the password and re-sourcing the file, which is where the answer nearly always is.
Where the password usually is
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The message that delivered the file
Archives are often sent with the password in the same email or chat, or in a follow-up message "for security." Search your inbox and message history for the file name and the sender.
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Your password manager
If you made the archive yourself, check your manager for the file name or the project. Many people save an archive password there and forget they did.
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The source you downloaded it from
Files from a portal, a backup tool, or a service often use a documented password, or let you simply download a fresh copy. Re-downloading is frequently faster than any recovery attempt.
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Whoever created it
If a colleague or provider made the archive, asking them for the password — or for an unencrypted copy — is the cleanest route, and usually the quickest.
Not every archive that "won't open" is password-protected. A partial download, a wrong file extension, or light corruption can look like a password problem. Re-downloading the file, or opening it in a different archive tool, sometimes resolves it with no password needed at all.
If the archive uses strong encryption and the password can't be recovered from any of the routes above, there is no legitimate method to open it — that's the guarantee the encryption exists to provide. The realistic path is to obtain the contents again from wherever they originally came from. We don't cover trying to break the encryption itself, because for a genuinely encrypted file that isn't a route that meaningfully exists.