Reviewing a document usually means marking it up — highlighting a key line, leaving a note for whoever reads it next. Annotate PDF adds both directly on the page: drop a highlight box over any text, or a sticky note with your own comment, then download the marked-up file.
How to annotate pdf
- 1
Upload your PDF file
Drag it onto the upload area, or click to choose it from your device.
- 2
Open Edit & Sign
Select the tool, then choose Highlight or Sticky note.
- 3
Place your annotation
Click on the page to drop it, then drag or resize into position.
- 4
Download your annotated PDF
Your highlights and notes are baked directly into the file.
Why use RealPDFTool for annotate pdf
Highlight and sticky notes in one tool
Mark up a page both ways without switching between separate tools.
Your files never leave your browser
Annotating runs locally, so your document is never uploaded.
Combine with text and signatures
Edit & Sign's other tools — typed text, a drawn signature, form fields — are right there in the same panel.
Frequently asked questions about annotate pdf
Can I remove an annotation before downloading?
Yes, nothing is finalized until you download — click the × on any highlight or note to remove it first.
Can I change what a sticky note says?
Yes, click into the note and edit its text directly before downloading.
Is there a page limit?
It runs entirely in your browser, so it's bounded by your device's memory rather than a server-side limit.
Are my files uploaded anywhere?
No — annotating happens locally, so your document is never uploaded.