Omni PDF is a browser-based PDF editor. It runs entirely on your device using modern web APIs, with no backend server required for the core editing features.
What Omni PDF does
Omni PDF provides a workspace for editing PDFs directly in your browser: adding text and images, drawing shapes and arrows, annotating pages, signing documents, and organizing page order. It also includes standalone tools for merging, splitting, compressing, rotating, cropping and converting PDFs.
How it works
When you open a PDF, your browser reads the file using the File API and renders its pages to a canvas using an open-source PDF renderer. Edits you make are drawn as annotation overlays on top of those pages. On export, the editor builds a new PDF where the overlays are flattened into the page content, so the result opens correctly in any PDF reader.
What we don't claim
We don't claim to be the fastest, the most secure or the only PDF editor. We describe what the product does and how it behaves. Where a browser limitation exists — password-protected files, very large documents on low-end devices, non-selectable scanned text — we tell you in the interface.
Privacy
The core editing workflow is local. Files are not uploaded to a server to be edited, merged or converted. See the privacy page for details on what, if anything, is stored.
Technology
Omni PDF is built with modern web standards: ES modules, Web Workers, Canvas 2D and open-source PDF libraries (PDF.js for rendering, pdf-lib for PDF creation). It's hosted as static files on Cloudflare Pages.
Contact
Questions, bug reports or feedback: see the contact page.