Annotate PDF Online
Highlight, comment and draw on your PDF, free in your browser.
- Privacy-focused
- Easy to use
- Lightning-fast
How to annotate a PDF
- contract.pdfDrop your PDF here
1. Upload your PDF
Drop a file or choose one. It opens right here in your browser.
- Edit this text
2. Mark it up
Select text to highlight it, or add notes, drawings, shapes and stamps.
- Download
3. Download your PDF
Save the finished PDF with your changes written into the file.
Your files never leave your device
PDFSleek runs the editor inside your browser. Your PDF is opened, edited and saved on your computer — it isn't uploaded to us, so there's nothing for us to read, keep or lose.
- Processed in your browserNo uploads while you edit.
- Encrypted connectionHTTPS everywhere.
- No tracking cookiesCookie-less analytics only.
Got questions?
Answers to the questions people ask most.
Is Annotate PDF free?
Yes. It's free with no sign-up and no watermark, for files up to 50 MB.
Will other people see my comments?
Yes. Annotations are saved as standard PDF annotations, so Acrobat, Preview and other readers show them.
Can I reply to comments?
Yes. The Comments panel lists every comment and lets you reply. Replies are saved as real PDF replies.