Processed on your device
Files are not uploaded to CookPDF servers
The main operation runs in the browser on your device.
Session can be restored
The browser can save a cache and local draft to continue your latest work.
Check before using
Review the resulting file, especially for documents that need to be signed, printed, or sent officially.
How to annotate a pdf
Follow three steps and check the result before downloading.
Open the PDF
Choose the document you need to read and respond to.
Add annotations
Highlight, draw or place comments on the relevant content.
Review and share
Check the marks you added, then download the result file.
Highlights
Useful capabilities for the right task on PDF documents.
Multiple markup styles
Combine highlights, drawings and comments to suit your review.
Contextual feedback
Place notes right next to the content they refer to.
Great for review rounds
Create an annotated copy to send back to the author.
Processed locally
Files are processed in the browser on your device.
Use cases
Common situations well suited to this tool.
Review documents
Flag errors and add suggested edits.
Study and research
Highlight key ideas and take notes while reading a document.
Internal discussion
Place comments right on the relevant table, figure or paragraph.
Ready to annotate your pdf?
Choose your PDF files to get started and check the result right in your browser.
Annotate and mark up PDFs online
Add comments, highlights, drawings and review marks to a PDF for discussion, review or study.
When is this tool a good fit?
- Reviewing documents: Flag errors and add suggested edits.
- Study and research: Highlight key ideas and take notes while reading a document.
- Internal discussion: Place comments right on the relevant table, figure or paragraph.
Recommended workflow
Open the file, set up the task on the preview, check each affected page, and only then download. Keep the original so you can compare or start over when needed.
Limitations to know
Recipients may use PDF readers that display annotations differently. If you need the appearance preserved, check the file in the application the recipient will use.
Data and session
The main operations run on your device and files are not uploaded to CookPDF servers. Your browser may store a local cache or draft to restore the session; you can clear the session in the interface or clear website data in your browser settings.
Frequently asked questions
Answers about capabilities, limits, and how files are handled.
Can I highlight and draw on a PDF?
Do annotations change the original content?
Can others delete the annotations?
How do I create a copy where annotations can no longer be edited?
Ready to annotate your pdf?
Choose your PDF files to get started and check the result right in your browser.