Annotate and draw on a PDF
Review drafts, mark up drawings and give feedback with freehand pen, shapes, arrows, highlights and text, all in one place.
- No upload: 100% in your browser
- No sign-up
- Free to use
PDF, JPG or PNG · processed on your device, never uploaded
How to annotate PDF
It takes less than a minute with PDFHeron.
Open the PDF
Drop the file onto this page.
Pick a markup tool
Draw, Rectangle, Ellipse, Line or Arrow. Hold Shift for perfect squares, circles and 45° lines.
Adjust
Move, resize, recolor and change thickness or opacity in the side panel.
Save
Download your annotated PDF.
Precise, editable markup
Every annotation stays editable until you save: select it to move, resize, restyle, duplicate or delete it. Annotations are saved as crisp vector graphics.
Why use PDFHeron to annotate PDF?
Private by design
PDFHeron processes files on your device. No uploads, no cloud copies, no one else ever sees your documents.
Real editing
Change existing text and delete content from the file itself, not just paint boxes on top of it.
Instant & offline-ready
No queues or upload waits. Big documents open in seconds, and editing keeps working without a connection.
True redaction
Redacted areas are permanently removed from saved PDFs, so hidden text can’t be copied back out.
Standard PDF output
Saved files are regular PDFs with selectable text that open in Acrobat, Preview, Chrome and every other reader.
Free, or $2 once
Use every tool for free. Remove the footer forever with a one-time Pro license, with no subscription.
Annotate PDF: FAQ
Can I draw with a pen or stylus?
Yes. The Draw tool works with mouse, touch and stylus input.
Are annotations editable after saving?
They are saved into the page content, so they look identical in every PDF reader. Keep a copy of the original if you plan more rounds of changes.
Can I add arrows and text callouts?
Yes. Combine the Arrow and Text tools for callouts.
Edit your PDF now. It’s free
No sign-up, no upload, no waiting. Open a file and start editing in seconds.
Open the PDF editor