PDF Annotate

The PDF Annotate tool lets you add highlights, notes, and annotations to PDFs directly in your browser — fast, free, and private. Add notes, highlights, and annotations to PDF files. Your files are processed securely and never stored on our servers. Whether you're handling a single document or a batch of files, this tool handles it in seconds with no file-size surprises and no signup walls. Works on desktop, tablet, and mobile.