Annotate PDF
Local Processing (Offline Capable)Visually add 9 types of annotations (text, sticky notes, highlights, rectangles, ellipses, lines, arrows, ink, and images) and save them as standard PDF annotation objects. Runs locally in your browser — your file is never uploaded.
How this tool works (no sign-up needed)
- Upload your file above. Each tool shows whether it runs Local (in your browser) or Cloud (encrypted servers).
- Adjust options, then click the Run / Convert / Process button.
- Wait for progress, then download the result. Use Next tools to continue.
If buttons are not visible, enable JavaScript — the interactive workspace loads in your browser.
Free · Local processingAnnotate in your browser — your file is never uploaded
Supports application/pdf
Local — your file is processed in your browser and not uploaded to us. No account needed.
What is it?Annotate PDF is a PDFLean smart document tool: Add 9 types of annotations to a PDF visually and save them as standard PDF annotation objects locally without uploading files.
TL;DR: Add text, sticky notes, highlights, rectangles, ellipses, lines, arrows, ink, and images to a PDF visually. Everything runs locally in your browser — your file is never uploaded and is cleared upon closing the page; annotations are saved as standard PDF annotation objects.
About this tool
Add 9 types of annotations (text, sticky notes, highlights, rectangles, ellipses, lines, arrows, freehand ink, and images) to your PDF visually. Everything runs locally in your browser's memory — free, no account required, and files never leave your device. Annotations are saved as standard PDF annotation objects that stay selectable and deletable in any reader.
How to use
Upload a PDF and select an annotation tool (text, note, highlight, rectangle, ellipse, line, arrow, ink, or image)
Click or drag on the page to annotate; adjust color, font size, or undo as needed
Click "Apply annotations and download" to save your annotated PDF
FAQ
Will my file be uploaded?
No. Everything runs locally in your browser — rendering and synthesis happen in client memory; your file is never uploaded and is cleared upon closing the page.
Are there any limits?
Annotations are saved as standard PDF annotation objects (FreeText/Text/Highlight/Square/Circle/Line/Ink/Stamp) that stay visible, selectable and deletable in readers like Adobe, Chrome and Preview; output is a standard PDF.
Can I undo mistakes while annotating?
Yes. You can undo the latest annotation step by step during editing, or clear every unsaved annotation on all pages with one click (this cannot be undone).
Can I process multiple files in bulk?
A single tool page handles one task at a time; for bulk work use the Batch Processing workflow and add this tool as a step to run a whole set at once.
Is the processed file still editable?
The output is a new PDF where annotations are standard annotation objects that can be moved, replied to or deleted in most readers (existing native annotations are preserved as-is); the original file remains untouched.