What you can do with these PDF tools
PDF is the format people send when a document has to look the same everywhere, which is also why it is awkward to change. The tools on this page cover the jobs that come up most: combining several PDFs into one, pulling a few pages out of a long report, making a file small enough for an email attachment or an upload form, turning pages into images and images into pages, and adding or removing a password.
They are grouped by task. Organize tools change which pages a file contains and in what order. Optimize tools make a file smaller or searchable. Convert tools move content between PDF and other formats such as Word documents or JPG images. Security tools encrypt a document with a password or remove one you already know.
Why processing in the browser matters for PDFs
PDFs are often the most sensitive files people handle: contracts, tax forms, medical letters, bank statements and ID scans. Most online PDF services upload the file to their servers, process it there and keep a copy for some period. These tools work differently. The PDF engine (pdf-lib for writing, PDF.js for reading and rendering, and qpdf compiled to WebAssembly for encryption) is downloaded into your browser, and the file is read straight from your disk into the tab's memory. Nothing about the document is sent to us.
You can check this yourself: open your browser's developer tools, switch to the Network tab, run any PDF tool and watch for requests. You will see the page and its code load, but no request carrying your file.
Limits and file sizes
Because the work happens on your device, speed depends on your computer or phone rather than a queue on a server. The free plan handles PDFs up to 50 MB each, ten files per job and a few hundred pages, which covers nearly every everyday document. Pro raises those limits for large scanned archives and long books. Password-protected files can be opened when you know the password; the tools never try to guess or crack one.
Which PDF tool to use
If a file is too big to send, start with compression; if it is too long, split it first and compress only the pages you need. To send several documents as one, merge them and then protect the result if it contains personal details. Scanned pages without selectable text should go through OCR before anything else, because every other tool works better on a PDF that contains real text.