Annotate PDF
Highlight, underline and strike through text, and add sticky-note comments.
Select a PDF file
or drop them anywhere on this page
Processed on your device. Never uploaded.
Processing on your device. Nothing is uploaded.
Add your files
Choose or drop a file from your device.
Adjust the options
Drag over text to highlight, underline or strike it through, or choose Note and click to add a comment.
Download the result
Save it, or send it straight on to another Paperwing tool.
ISO gap assessment tool
About Annotate PDF
Annotate PDF lets you highlight, underline and strike through text and add sticky-note comments. They are saved as real PDF comments, so they show in Acrobat, Preview and every other reader, and others can reply to them. Your file never leaves your device.
Why use Paperwing
- Private by design Files are processed in this tab with JavaScript. Nothing is sent to a server, so contracts and medical records stay with you.
- No queues, no waiting There is no upload step, so a 50-page merge finishes about as fast as your device can read the files.
- Chain your tools Finished merging? Send the result straight to Compress, Sign or Page numbers without downloading in between.
- Works offline, installs as an app Open a tool once and it keeps working without internet. Install Paperwing to open PDFs straight from your computer.
Frequently asked questions
Is Annotate PDF free?
Yes. Annotate PDF is free to use, with no sign-up, no watermark and no daily limit.
Are my files uploaded to a server?
No. Paperwing processes your files inside your browser, on your own device. They are never uploaded, and they are cleared from memory when you close the tab.
Does it work on my phone?
Yes. Paperwing works in any modern browser on Windows, Mac, Linux, Android and iPhone, with nothing to install.
Is there a file size limit?
Each file can be up to 300 MB. Very large files depend on your device's memory, so a computer handles them faster than a phone.