Most tools that rank for “free PDF editor” are freemium: the free tier adds watermarks, caps you at a couple of files per day, or locks OCR and compression behind a subscription. And nearly all of them upload your document to their servers to process it — which matters when the document is a contract, a tax return or a medical record.
A genuinely best-in-class free editor should be judged on five things: price honesty (is everything actually free?), output quality (no watermarks or quality loss), privacy (does the file leave your device?), capability (can it edit, sign, merge, OCR, compress?) and friction (accounts, installs, limits). EditFreePDF was built to win on all five: it's a browser application, so the PDF is processed by your own computer — there is no server to upload to, no account database, and no reason to watermark anything.