Yes. Your file travels over an encrypted connection and stays private to you — nobody else can open it. Projects you save are kept in your account until you delete them, and download links we email you expire after 7 days.

PDF Tools

Annotate PDF

Highlight, draw, add comments, text boxes, shapes and signatures — a full annotation toolkit.

Drop a PDF to annotate it

or browse from your device — it opens in the editor right away

1Drop your PDF
2Highlight, draw and comment
3Download the marked-up PDF

Private & secure· Highlight, draw & comment· No watermark

Annotate PDF files online — the full toolkit

Our PDF annotator gives you everything you need to mark up a document. Highlight important passages, draw freehand, add comments for review, box and arrow what matters, or type notes anywhere on the page — all in one place, with nothing to install. Your annotations stay editable until you download, and you can change colours and sizes any time.

Full Markup Toolkit

Highlight, underline, strikethrough, draw freehand, and add text anywhere.

100% Private

Files travel over an encrypted connection and stay private to you.

Shapes & Stamps

Add rectangles, ellipses, lines, arrows, and custom stamps like APPROVED.

Frequently asked questions

You can upload your PDF, annotate it and keep editing in the AI Studio before you pay anything. Downloading the finished file is part of every MojoPDF plan — start with the 7-day trial for $1 and cancel any time.