Annotate PDF

1. Choose a PDF to mark up and select its page.
2. Pick a mark type, enter any text, then drag over the page or use Add at centre.
3. Review your marks in the list; remove any that you do not want.
4. Save the annotated copy, choosing flatten only if the new marks should become permanent.

Mark type

Choose the kind of note or drawing to add.

Page

Switch between pages; marks stay on their original pages.

Make new marks permanent (flatten)

Paint only your new marks into the page. Existing annotations and form fields are kept.

Text size and colour

Set the appearance of new marks. Text boxes must be large enough to fit their text.

Process all files

Choose multiple inputs for annotate pdf. This runs the settings above separately for each file, shows individual results and failures, and offers Cancel file, Cancel all files and Download batch as ZIP. Check that page positions or form fields suit every input.

PDF files that can be opened without a password. Use Unlock PDF first when necessary.

Up to 500 new marks per copy. Text boxes and notes accept up to 2,000 characters each.

Local tests saved a note on the last page of PDFs with 50, 300 and 1,000 simple text pages. Text boxes that would cut off text are rejected on save.

All seven capacity tests passed in Chromium, Firefox and WebKit, including a 200 MB generated image PDF. Your file may need more memory; mobile devices and the Safari app were not tested.

Up to 100 input files and 512 MB total; up to 200 output files or 512 MB. ZIPs over 128 MB need Chrome/Edge direct disk saving; use individual downloads in other browsers. The Workflow stress test completed 100 synthetic files in all three engines; this does not guarantee the same capacity for every conversion.

Your marks are saved as editable PDF comments. Editing support varies by reader and mark type. Flattened marks become part of the page and cannot be edited separately.

No. A text box adds a visible mark over the page. Use Redact PDF to permanently remove sensitive page content.

Text boxes, highlights, underlines, strike-through marks, freehand drawings, rectangles, ovals and sticky notes. Drag to place a mark.

Changing a digitally signed file prevents its original signature from verifying. The tool requires confirmation before creating an edited copy. Keep the signed original.