Your files never leave this device
Every PDF tool. Zero uploads.
Merge, split, convert and edit PDFs right in your browser — free, unlimited and offline-capable. No sign-up, no file limits, no waiting on servers.
Merge PDF
Combine multiple PDFs into a single document.
Split PDF
Separate one PDF into multiple files by page range.
Reorder pages
Drag pages into a new order and save the result.
Extract pages
Pull selected pages out into a brand-new PDF.
Delete pages
Remove unwanted pages from your document.
Rotate PDF
Turn pages 90° or 180° — one page or all at once.
Add page numbers
Stamp clean, positioned numbering on every page.
Add watermark
Overlay your own text across every page.
JPG to PDF
Turn JPG and PNG images into a polished PDF.
PDF to JPG
Export every page as a high-quality JPG image.
Compress PDF
Shrink file size while keeping quality sharp.
Protect PDF
Lock your PDF with password encryption.
Why local-first
Not private by promise. Private by design.
Most online PDF sites upload your documents to their servers. OnsitePDF is built so that it can't — processing happens in your browser, full stop.
Uploads are impossible
Files are processed on your device by a background worker. A locked-down security policy makes sending bytes anywhere technically impossible.
Works fully offline
Once the page has loaded, every tool keeps working without a connection — on a plane, in a dead zone, or on an air-gapped machine.
Free and unlimited
No accounts, no file-size ceilings, no daily quotas and nothing stamped on your output. Your documents stay yours.