Optimize & Secure PDF: Compress & Unlock
Shrinking a file or removing a password are operations you never want to outsource. These tools compress and unlock PDFs on your device, so the file you are optimizing and the password you type stay local and are never transmitted.
Compressing a PDF for email
Compress PDF re-encodes page images at a resolution you choose: Screen for the smallest files (good for email and the web), Balanced for everyday use, or Print for high quality. Scanned, image-heavy PDFs typically shrink 60 to 80 percent. If a file is mostly text it is already compact, and the tool will keep your original rather than hand back something larger.
Unlocking a PDF: two different locks
PDFs carry two kinds of protection. Editing restrictions let the file open but block printing or copying, and those can be removed without a password. An open password is required just to view the file, and you must know it; no tool can legally bypass an unknown open password. Unlock PDF detects which type you have and tells you what it can do.
Why your password never leaves your device
To unlock a file the password is used locally, in your browser, to decrypt the document, then discarded when you close the tab. It is never sent anywhere. That is the whole point: uploading a protected file to a cloud unlocker means trusting that server with both your document and the password that protects it. On-device unlocking removes that trust requirement entirely.
Compression re-encodes page images locally; unlocking decrypts the file in browser memory using the password you provide, then discards it. Neither the document nor your password is ever uploaded. Other tools that ask you to upload a protected file are asking you to trust their server with your password too.
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