Annotate PDF
Add text notes, highlights, shapes, lines, or visual redaction blocks.
Add Files
Files stay in this browser unless the tool explicitly asks for cloud consent.
Settings
Configure the operation before processing.
Run
Ready when your file is.
About Annotate PDF
Annotate PDF is a free online tool for marking up PDF pages in your browser. You can add text notes, highlights, rectangles, ellipses, lines and solid blocks that visually cover content, with control over color, opacity, border and which pages are annotated.
Last updated: · By Derar Sattouf
How to use Annotate PDF
- Add the PDF you want to mark up.
- Choose a type: text note, highlight, rectangle, ellipse, line or redaction block.
- Set the color, opacity, border, text and pages.
- Click Apply Annotation and download the annotated PDF.
Features
- Text notes and highlights
- Rectangles, ellipses and lines
- Visual redaction blocks
- Color, opacity and border controls
- Runs locally with no upload
Frequently asked questions
Is Annotate PDF free?
Yes. Annotate PDF is completely free, with no account, no sign-up, no watermark added to your files and no daily limit.
Are my files uploaded when I use Annotate PDF?
No. The PDF is opened and processed inside your browser with JavaScript, so the file never leaves your device and is not stored on any server.
Does the redaction block permanently remove text?
No. It draws a solid box over the area, which hides it visually, but the original text can still exist underneath. Do not rely on it for legally sensitive redaction.
Does it work on a phone or tablet?
Yes. It works in current versions of Chrome, Safari, Edge and Firefox on desktop, Android and iOS. Nothing needs to be installed.