Annotate PDF online for free using our powerful, easy-to-use PDF annotation tool. Add highlights, sticky notes, freehand drawings, shapes, stamps, text boxes, and form fields to any PDF document — directly in your browser. Whether you are reviewing a legal contract, marking up a research paper, giving feedback on a design, or completing a student assignment, our tool gives you everything you need to communicate clearly on any PDF. No Adobe Acrobat, no software installation, no signup required.
An online PDF annotation tool lets you add highlights, comments, drawings, stamps, and shapes to a PDF directly in your browser — no Adobe Acrobat, no software installation, and no account needed. Upload your PDF and annotate it with a full set of markup tools, then download the annotated file in seconds.
At PDFFixNow, you can annotate PDF online for free. All annotations are permanently embedded in the downloaded file — visible in every PDF reader on every device. Works on Windows, Mac, iPhone, and Android.
Types of PDF annotations you can add: Our tool supports the full range of standard PDF annotation types: Highlight annotations — color-coded text highlights in yellow, green, blue, or pink; Freehand drawing — pen strokes, circles, arrows, and handwritten notes; Sticky notes — pop-up comment boxes linked to a specific page location; Text boxes — permanent typed text overlaid on the page; Shape annotations — rectangles, circles, lines, and arrows; and Stamps — professional presets like APPROVED, DRAFT, CONFIDENTIAL, and FOR REVIEW.
Why annotate a PDF instead of editing it? Annotations are non-destructive — they sit on top of the original content without altering it. This makes them ideal for document review, feedback, and collaboration. The reviewer marks up the PDF; the author sees the comments and makes changes to the source document. This is the standard workflow in legal, academic, architectural, and corporate environments.
Upload your PDF
Drag and drop your PDF file into the upload box or click to browse your device. Your document will load in the annotation editor with a full page preview.
Add your annotations
Select any annotation tool from the toolbar — highlight text, draw freehand, insert a sticky note, add a stamp, draw a shape, or place a text box. Apply your markups to any page. You can add multiple annotations of different types in one session.
Download your annotated PDF
Click "Annotate PDF" to embed all your annotations permanently into the file. Your annotated PDF downloads instantly — ready to share, review, or archive.
PDF annotation is a standard workflow in many professional, academic, and personal contexts. Here are the most common situations where adding annotations saves time and improves communication.
Highlight & Text Markup
Highlight important text passages in yellow, green, blue, or pink. Add underline or strikethrough to mark deletions and revisions. Emphasize key points instantly without altering the original content.
Freehand Drawing
Draw freely on any part of your PDF — circle items, sketch arrows, underline manually, or add handwritten notes directly on the page. Adjust pen color, thickness, and opacity to match your needs.
Sticky Notes & Comments
Insert sticky note annotations at any position on the page to add reviewer comments, questions, or reminders. Notes are visible when hovering or clicking — ideal for document review workflows.
Shapes, Stamps & Icons
Add rectangles, circles, arrows, lines, and professional stamps like APPROVED, DRAFT, or CONFIDENTIAL. Choose from a library of icons to visually mark sections, callouts, or important areas.
Secure & Private Processing
All uploads are protected with TLS encryption and automatically and permanently deleted from our servers after 2 hours. We never read, store beyond that window, or share your documents.
Works on All Devices
Annotate PDFs on Windows, Mac, Linux, iPhone, iPad, or Android — directly in your web browser. No desktop app, no Adobe Acrobat, no plugin required.
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