Annotate PDFs, highlight and draw

Mark up documents with highlights, freehand drawings, and text notes. Redact sensitive content with permanent whiteout \u2014 all in your browser.

Drop a PDF here or click to browse

Max ... MB

No account required. Your PDF is processed instantly.

Annotation tools for every workflow

Highlight Text

Select the highlighter and drag over text to mark important passages. Choose from multiple highlight colors to categorize your notes.

Freehand Drawing

Draw directly on the PDF with a smooth freehand pen. Adjust stroke width and color to create annotations, circles, arrows, or sketches.

Whiteout & Redact

Use the whiteout tool to permanently erase content. Unlike simple overlays, whiteout removes the underlying data from the PDF file.

Add Text Notes

Click anywhere on the page to add text annotations. Choose from 33 fonts with full control over size, color, and positioning.

E2E Encryption

Your document is encrypted in the browser before it reaches the server. Annotations are private by default.

No Data Collection

RedaktPDF does not track which documents you annotate. Files auto-delete after the retention period expires.

How to annotate a PDF online

1

Upload your PDF

Drag and drop your document or click to browse. PDFs up to 50 MB and 500 pages are supported.

2

Choose your annotation tool

Pick from the highlighter, freehand pen, whiteout eraser, or text tool. Each tool has adjustable size and color settings.

3

Download the annotated PDF

Save your work and download the annotated document. Annotations are embedded directly in the PDF.

Frequently asked questions

What annotation tools are available?
You can highlight text, draw freehand markups, add whiteout redactions, and insert text notes anywhere on the page.
Are annotations embedded in the PDF?
Yes. All annotations are saved directly in the PDF file and will be visible when opened in any PDF viewer.
Can I annotate a scanned PDF?
Yes. You can draw, highlight, and add text over scanned documents. OCR is available on Pro for text-aware operations.

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