Add text, highlights, rectangles, and arrows to your PDF. Free, instant, nothing leaves your device.
Drop your PDF here
or click to browse — PDF files only
Annotating happens locally in your browser using pdf-lib. Nothing is sent to a server.
Four annotation types cover most markup needs, each in a color you pick.
Place each annotation exactly where it belongs and resize it to fit.
No waiting for uploads — your annotated PDF is ready in seconds.
Navigate between pages and annotate wherever you need to.
Drag and drop your PDF onto the page, or click to browse.
Pick text, highlight, rectangle, or arrow, then click on the page to place it. Drag to reposition, resize, and pick a color.
Click Annotate PDF — your browser flattens every annotation into the document instantly. Download the result, nothing is uploaded.
Whether you're reviewing a contract, studying a PDF textbook, or leaving feedback on a design — PixelTools annotates your PDF in seconds, free, with no upload.
Highlight key clauses and add notes before sending a document back for revision.
Highlight passages and add margin notes on a PDF textbook or paper.
Point out a missing field or add a rectangle around the section that needs attention.
Add a comment directly on a proposal or design PDF instead of writing a separate email.
Yes, completely free with no limits. No account required.
No. Annotating happens entirely in your browser using pdf-lib. Your file never leaves your device.
Free text, highlights, rectangles, and arrows — each in a color you choose, placed anywhere on any page.
Yes. Select it to drag, resize, recolor, or (for text) edit the wording, right up until you click Annotate PDF.
Yes. Select it and click the × button that appears on its corner.
Add your signature to a PDF by drawing, typing, or uploading it, then flatten it into the document — free, in your browser, nothing uploaded. Plus how to annotate a PDF with text, highlights, and shapes.
Merge, split, rotate, crop, compress, delete pages, or unlock a PDF — all free, in your browser, no upload. A complete guide to PixelTools' PDF tools.
Free, instant, no account needed.