PDFMergely

PDFMergely is a free suite of PDF tools that run entirely in your browser. Merge, split, reorder, rotate, delete and extract pages, compress, watermark, add page numbers, and password-protect or unlock PDFs — all without uploading your files.

Most online PDF tools send your file to a server to process it. PDFMergely does the opposite: instead of sending your file to the code, it sends the code to your browser. Every operation runs locally on your device, so there's no upload step — because there's nowhere to upload to. It's privacy by architecture, not by promise: a strict Content Security Policy means file data has no network path to leave the page, and the app keeps working offline after the first visit.

What you can do, all free:
- Merge, split, reorder and rotate PDFs
- Delete or extract pages
- Compress PDFs for email
- Add watermarks or page numbers
- Password-protect or unlock PDFs

No account, no watermarks on your files, and it works on mobile too. The honest tradeoff: because everything runs on your device, very large files lean on your device memory and a phone is slower than a desktop — a fair price for documents that never leave your hands.