Annotate PDFs online — highlight text, underline, add sticky notes, draw freehand, and add shapes. Save annotations directly to your PDF.
Drop PDF here or click to open
Supports PDF files up to 100MB
Drag and drop or click to select your PDF file.
Select highlight, underline, note, draw, or shape from the toolbar.
Your annotations are embedded in the PDF. Download when done.
Yes. OnePDFs is free to use, requires no account, and does not add an extra OnePDFs branding watermark; watermark tools add only the watermark you choose.
Your files stay on your device and are processed locally in your browser; no upload to our PDF processing service is required. A browser copy can remain in this site's IndexedDB until you clear site data or the browser evicts it.
The tool supports PDFs up to 100MB. Work runs in your browser, so the time depends on page count, document complexity, and your device resources.
No installation is needed. The tool runs through your browser and does not send the PDF to our processing service.