Browser-only · Private · On-device
PDF tools
Merge, split, rotate, reorder, delete pages, add watermarks, stamp page numbers, and strip metadata — all processed locally. Files stay on your device.
10
Tools available
100%
Browser-based
$0
Free to use
∞
No fixed size limit*
* Browser memory is the practical limit. Most PDFs under 200 MB process fine.
Organize
Merge, split, reorder, rotate, and manage PDF pages
Organize
Merge PDF
Combine multiple PDF files into a single document. Upload, arrange, then download — all in your browser.
Organize
Split PDF
Split a PDF into individual pages. Each page is saved as a separate PDF inside a single ZIP download.
Organize
Rotate PDF
Rotate all pages or selected pages in a PDF by 90°, 180°, or 270°.
Organize
Delete Pages
Remove one or more pages from a PDF. Enter the page numbers to delete and download the trimmed file.
Organize
Extract Pages
Extract specific pages from a PDF into a new file. Enter a page range and download just those pages.
Organize
Reorder Pages
Change the page order of a PDF by specifying a new page sequence.
Edit
Add page numbers, watermarks, and annotations
Optimize
Compress PDF
Shrink a PDF in your browser. Best for scanned or image-heavy files.
Edit
Add Page Numbers
Add page numbers to every page of a PDF. Choose the position, starting number, and font size.
Edit
Add Watermark
Stamp a text watermark on every page of a PDF. Set the text, opacity, and rotation.
Privacy
Remove metadata and prepare files for sharing
Your files stay on your device
Every tool on this page runs in your browser using pdf-lib. On this site, your PDF files are not uploaded to any server. Files are not retained after you close the browser tab.
FormatOS does not unlock, decrypt, or bypass password-protected PDFs. Tools that claim to "unlock" PDFs are not offered here.