Frequently asked questions

Yes. Every tool is free, with no trial period, no paid plan, no daily limits and no watermark on your files. If you would like to support development, there is an optional donation page.

No. Your documents are processed inside your browser on your own computer. They are never sent to Unique Labs or to any other server, and the extension is built so that the browser blocks any attempt to send data out.

Yes. After installation, all the PDF tools work without an internet connection.

Chat with PDF and AI Summary use the AI built into Chrome. They need desktop Chrome 138 or newer on a computer that Chrome supports for its built-in AI. The first time, Chrome may need to set up its AI model, and Unique PDF shows the progress. On other computers, chat works as a clearly labelled text search that points you to the right pages, and a quick summary without AI picks out the most important sentences.

Yes, like any AI. That is why every answer shows its page references. Please check important details against the document.

The editor adds new content on top of the page, such as text, drawings, shapes and images. It does not rewrite text that is already in the document. To replace a word, you can cover it with a white rectangle and type the new text on top.

Yes, when you know the password. Unique PDF asks for it and then lets you use the document in any tool. It never tries to guess or bypass passwords.

Yes. Redacted areas are removed from the file rather than covered with a black box, so they cannot be copied, searched or recovered. Unique PDF also removes hidden information such as document details, and checks the result after redacting.

You can merge, split, compress, sign and protect scanned documents like any other. Chat and summaries need selectable text, so they cannot read pages that are only scanned pictures yet. Text recognition is on our roadmap.

Compression mainly makes large images inside the file smaller, while text and line drawings stay sharp. You can choose a gentler level to keep more image detail. The strongest setting turns pages into images for the smallest possible file and tells you clearly before you use it.

No. Every tool creates a new file, and your originals are only read.

In your Downloads folder, or wherever you choose if you turn on "Ask where to save each file" in Settings.

Only your settings and, if you leave it switched on, a short list of recent file names and sizes, never their contents. You can clear everything in Settings at any time.

Only permission to store your settings on your computer. Unique PDF cannot read or change the websites you visit.

Yes. Merge and Organize accept several documents at once, and you can turn many photos into one PDF in a single step. Split results are delivered together in one download.

Yes. Unique PDF works wherever desktop Chrome runs. Unique AI depends on whether Chrome offers its built-in AI on your computer.

Unique PDF sets no limit of its own. Very large documents depend on your computer's memory, and documents with hundreds of pages are handled comfortably.

Yes. Alt+Shift+P opens Unique PDF in a tab, Alt+Shift+U opens the quick menu, and Ctrl+K (Cmd+K on Mac) searches for any tool. You can change the extension shortcuts in Chrome's settings.

Yes. Choose light, dark or match your system, from the sidebar, the toolbar popup or Settings.

Use the links on the About page or the Donate page to reach the developer. Suggestions are always welcome.