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.
Excel to PDF
Convert a spreadsheet to PDF, privately on your device.
PDF to Word
Convert a PDF to an editable Word document, privately on your device.
Word to PDF
Convert a Word document to PDF, privately on your device.
Guides
How to compress a PDF to reduce file size
Shrink a PDF for email or upload — entirely in your browser, with nothing sent to a server. A practical guide to compressing PDFs privately.
How to convert JPG images to a PDF
Turn JPG and PNG images into a single PDF, right in your browser — ideal for scanned forms and receipts, with no upload.
Why local-first PDF tools are safer than online converters
Online PDF tools upload your files to a server; local-first tools never do. Here is what that difference means for your privacy.
How to merge PDF files for free without uploading them
Combine PDFs entirely in your browser — no upload, no sign-up. A step-by-step guide to merging PDF files privately.
How to password-protect a PDF
Encrypt a PDF with a password so only the right person can open it — done on your device with AES-256, never uploaded.
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.