Short answer
These PDF tools run entirely inside the web browser. They rearrange a document's page tree — merging, extracting, deleting and rotating pages — while copying the page content across untouched, so nothing is re-rendered and no quality is lost. Because the work is local, documents are never uploaded, no account is required, and no watermark is added.
Join several PDFs into one document, in the order you set.
Take the pages you need out of a PDF and save them as a new file.
Drop the pages you do not want and keep the rest of the document.
Turn sideways pages upright and keep the rotation in the file.
Put JPG and PNG images into one PDF, one image per page.
Turn PDF pages into JPG or PNG images, one image per page.
A PDF is a container of page objects rather than a picture of a document, which is why merging two files or pulling three pages out of one is a structural edit rather than a conversion. The text, vectors and images inside each page are copied byte for byte, so the result is visually identical to the input and the file opens in a fraction of a second.
That local, structural approach is also the point for confidential material. Contracts, medical letters, bank statements and signed forms are exactly the documents people are told to think twice about uploading to a free website — and here there is nothing to think twice about, because the file is opened by the page and never sent anywhere.
Yes. There is no paid tier, no page limit, no daily cap, no account and no watermark stamped on the output. The processing runs on your device, so there are no per-file server costs to recover.
No. Each tool reads the file into the page and writes the new document there too. You can verify this by opening your browser's network panel, or by disconnecting from the internet after the page has loaded — the tools keep working.
No. These tools move whole pages between documents rather than redrawing them. The content streams are copied unchanged, so text stays selectable and searchable, images are not re-compressed, and the result is pixel-identical to the original.
No. A PDF with an open password is encrypted, and these tools deliberately make no attempt to bypass that. Remove the password in the application that created the file, then process it here.
Because an honest one is not possible in a browser without ruining the document. The only large saving available is rasterising every page into a JPEG, which destroys the text layer, the links and the ability to select a word. A tool that promised compression and quietly did that would be selling a bad trade.
