PDF Annotator
FreeAdd sticky notes, comments and annotations to PDF files
Open a PDF to edit
Drag & drop or click to browse
Edit text · Add shapes · Highlight · Redact · Sign · Draw
About PDF Annotator
Plain text is not always enough when you are reviewing a document. You want to leave a comment, attach a sticky note, or jot a question right next to the relevant spot so the next reader knows exactly what you mean.
This PDF Annotator lets you add sticky notes, comments, and annotations directly onto your file. You place your notes where they belong, save them, and download a document that carries your feedback. It is free, runs in your browser without signup, and adds no watermark. It is a handy way to mark up a draft, leave instructions, or collaborate on a document without printing it.
Common uses
- Leaving sticky-note feedback on a draft for a colleague
- Adding comments to explain requested changes
- Jotting questions next to specific lines in a contract
- Marking up a document during a review cycle
- Adding instructions for the next person handling the file
How to use
- 1
Upload your file
Click the upload area or drag & drop your file. Supports APPLICATION/PDF. Up to 50 MB.
- 2
Click "Process — PDF Annotator"
Click the process button. Your file is converted instantly on our secure servers.
- 3
Download your result
Preview and download your converted file. No watermarks, no quality loss, no expiry.
Why ToolHub?
- 100% Free — no account needed
- Works in your browser — no software required
- Instant results
- Secure and private
- No data stored
- Simple to use
FAQ
What kinds of annotations can I add?
You can add sticky notes, comments and other annotations placed wherever you need them on the page.
Will the recipient be able to see my notes?
Yes. The annotations are saved into the PDF, so anyone who opens it can read your comments.
How is annotating different from highlighting?
Annotating adds notes and comments, while highlighting marks existing text with color. Use whichever suits your review.
Can I use PDF Annotator on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.