Highlight text, draw, and add notes to any PDF — directly in your browser.
No file upload. No account. No cost.
Drop your PDF here
or click to browse
No software to install. Works on any device with a browser.
Drop your PDF file into the upload area or click to browse. Your file is loaded directly in your browser — nothing is sent to any server.
Highlight areas in any color, underline or strikethrough text, draw freehand, or add sticky text notes anywhere on the page.
Click Download to save your annotated PDF. All your highlights and notes are embedded in the file, ready to share.
A free alternative to Adobe Acrobat — no subscription required.
Drag over any area to highlight it in yellow, green, blue or pink.
Drag under any text to add an underline annotation.
Drag over text to add a strikethrough line through it.
Draw arrows, circles or any shape directly on the PDF.
Click anywhere to add a text label or comment on the page.
Your PDF is processed entirely in your browser. No file is ever uploaded.
Is this PDF annotator really free?
Yes, completely free. There are no hidden fees, subscriptions or limits. You can annotate as many PDFs as you want at no cost.
Do my files get uploaded to a server?
No. PDFOnly processes everything locally in your browser using JavaScript. Your PDF never leaves your device.
How do I highlight a PDF online?
Open your PDF, select the Highlight tool from the toolbar, then click and drag over the area you want to highlight.
Can I annotate a PDF without signing up?
Yes. No account, no email and no login required. Just open the site and start annotating immediately.
How do I save my annotations?
Click the Download button. Your annotations are embedded into a new PDF file which you can save and share.
Does PDFOnly work on mobile and tablet?
Yes. PDFOnly works on any device with a modern browser. No app installation is needed.