PrivConvert

PDF tool

Annotate PDF

Mark up a PDF with highlights, text, lines, shapes, or freehand drawing.

Add your input

Your file stays in this browser.

Settings

Good to know1 file · 100 MB max · 500 pages max
Upload a PDF fileResult: PDF file
  • Your PDF stays in this browser while the tool runs.
  • Encrypted or damaged PDFs may need to be unlocked or repaired before this tool can read them.
  • This tool preserves page artwork where possible, but it does not rewrite original PDF text like a word processor.
  • Use the preview to place text, shapes, lines, or freehand marks before running.

Next tools

Keep working with this file

Edit PDFEdit PDF text and styles, draw signatures, and add highlights, review notes, shapes, and images.Add textAdd new text to a PDF page. This does not edit existing paragraphs.Add imagePlace a PNG or JPG image on top of one PDF page.Image watermarkOverlay a PNG or JPG watermark image on selected PDF pages.

How it works

How to use Annotate PDF online

  1. Upload a PDF file. The tool validates the published file type and size limits before the run.
  2. 14 adjustable settings. Review these settings before processing.
  3. Run the tool in your browser, review the result, and download the pdf file.

Overview

Annotate PDF with local-first browser processing

Mark up a PDF with highlights, text, lines, shapes, or freehand drawing. Review supported input, output format, settings, browser requirements, and practical limits before starting.

Input

Upload a PDF file

Output

PDF file

Limits

1 file · 100 MB max · 500 pages max

Best for

Annotate PDF use cases

  • Prepare the pdf file for sharing, archiving, or another file workflow.
  • Process the job in your browser without creating an account.
  • Check the published limits before processing larger or unusual inputs: 1 file · 100 mb max · 500 pages max.

Processing

What happens in your browser

PrivConvert uses PDF.js viewer, Canvas, and pdf-lib for this workflow. 14 adjustable settings. No special browser capability is required for typical inputs

Your PDF stays in this browser while the tool runs.

Related tools

Edit PDFAdd Text to PDFAdd Image to PDFAdd Image WatermarkAdd Page NumbersAdd Signature Image to PDF

FAQ

Annotate PDF questions

See how privacy works

Is Annotate PDF free to use?

Yes. This tool is free to use in your browser and does not require an account.

Are my files private?

Annotate PDF uses PDF.js viewer, Canvas, and pdf-lib in the browser. Selected files are processed locally when the required browser features are available, while application, library, model, security, and limited analytics requests may load separately.

What limits should I know about?

1 file · 100 MB max · 500 pages max. Encrypted or damaged PDFs may need to be unlocked or repaired before this tool can read them.