Edit PDF Online for Free
Add text, draw signatures, and annotate any PDF — entirely in your browser, with zero server uploads.
Open PDF Editor →How It Works
- 1
Open the PDF Editor
Click "Open PDF Editor" on the homepage. No sign-up or installation is required.
- 2
Upload Your PDF
Drag and drop your PDF onto the canvas, or click the upload button to browse for the file. Files up to 25 MB are supported.
- 3
Edit Your Document
Use the toolbar to add text boxes, draw freehand shapes, or insert a signature on any page.
- 4
Download the Edited PDF
Click the Save / Download button. Your annotated PDF is assembled in the browser and downloaded instantly — nothing is stored online.
About This Tool
Need to edit a PDF but don't want to hand your document over to a cloud service? You're in the right place. LumiCore PDF Editor lets you open, annotate, and save any PDF file without sending a single byte to a remote server. Every edit happens inside your browser using WebAssembly technology — meaning your contracts, medical records, tax forms, and personal documents stay 100% on your device.
Getting started takes seconds. There's no account to create, no email to verify, and no software to install. Simply open the editor, drop in your PDF, and start typing. Add text annotations anywhere on the page, choose your font size and colour, and draw freehand marks or signatures with your mouse or touchscreen. When you're done, hit Save and your browser immediately downloads the finished file.
Privacy is not an afterthought here — it's the architecture. We couldn't access your documents even if we wanted to because they never reach our servers. This makes our free PDF editor the safest choice for editing sensitive documents online. Works seamlessly in Chrome, Firefox, Safari, and Edge on desktop and mobile.
Ready to get started? No sign-up, no downloads, no cost.
Open PDF Editor for Free →