You don't need a $100 editor to do most PDF jobs. Nine times out of ten you just want to glue two files together, pull one page out, or shrink something so it fits in an email. That's what the Docs tools on this site are for — and they do it without your file ever leaving the tab.
A quick way to decide: are you combining, cutting, shrinking, or changing format? Combine → merge. Cut → split or delete pages. Shrink → compress. Format → the two converters. Most "I just need to fix this PDF" moments are one of those four.
Honest limitation of the compressor: because it rebuilds each page as an image, the output is image-based. For a scanned contract that's perfect — it drops the size a lot. For a text-only report it won't help much, and you'd lose selectable text. Use it where it fits.
A PDF is often the most private thing on your computer — a contract, a tax form, a medical letter. The moment you upload it to "a free converter," you've copied that document onto someone else's server, and you're trusting them to delete it. Plenty of those sites don't, or they keep it longer than they say.
Local processing removes that bet. The file is opened by the page, changed by code running on your machine, and the result is handed straight back to you as a download. Close the tab and there's nothing left on any server, because there was never anything on one. For anything sensitive, that's the whole game.
Say you scanned a 20-page lease and only need pages 3–7 emailed to your landlord. Open Split PDF, type 3-7, download the one file, and you're done — without the landlord ever seeing the other 13 pages, and without the scan touching a server.
That's the point of keeping a drawer of small, free, no-signup tools around: the job that used to mean "install something or trust a stranger" becomes a 30-second tab. ☕