Annotate PDF
EditDrop sticky-note text annotations and arrow callouts anywhere on a PDF. Great for review feedback, comments and quick corrections.
How to use Annotate PDF
- Open this page in any modern web browser — no download or installation required.
- Click Add file or drag and drop your PDF onto the drop zone.
- Adjust the available settings to fit your needs.
- Click the action button and save the processed file — the result is ready instantly.
Files never leave your browser. No upload to any server.
Processing runs locally on your device. No queues, no waiting.
No signup, no watermarks, no limits. Use as many times as you like.
Why use Annotate PDF on PDF Modern?
PDF Modern’s annotate pdf tool processes your file entirely within your web browser using modern WebAssembly technology. Unlike traditional online PDF services that require uploading your documents to remote servers, your files never leave your device — ensuring complete privacy and security. Processing happens at the full speed of your CPU, not limited by upload or download bandwidth, so even large files are handled in seconds. There are no file-size restrictions, no daily usage caps, no watermarks on output, and no account creation needed. It is a fully free, open tool built for everyday document workflows at home, school or the office.
Frequently asked questions
Are annotations editable later?
Annotations are flattened into the PDF when you save. To re-edit, keep the original file and start a fresh session.
Can I move a note?
Yes — click and drag any annotation in the editor before saving.