Edit PDF Online — Add Text, Highlight, Draw & Annotate for Free

Need to mark up a PDF contract, annotate a research paper, add a note to a scanned form, or highlight key sections before sharing? Our free online PDF editor lets you do all of that directly in your browser — no downloads, no account, no subscription. Upload your PDF, edit any page with the built-in annotation toolbar, and download a clean edited PDF in seconds.

Every edit happens entirely on your device. Your file is never uploaded to any server, making this tool safe for confidential documents, legal files, and personal records.

How to Edit a PDF Online — Step by Step

1. Upload your PDF — Drag and drop the file into the upload area or click to browse. Files up to 50 MB are supported.
2. Choose an annotation tool — Select from Text, Draw, Highlight, Rectangle, Ellipse, Arrow, or Erase using the toolbar.
3. Annotate your pages — Click on the PDF canvas to add text, click and drag to draw shapes or highlights, and use the color picker and size slider to customize each annotation.
4. Navigate between pages — Use the Prev / Next buttons to move between pages. Annotations on each page are saved automatically as you navigate.
5. Undo or clear — Use the Undo button to remove the last annotation, or Clear Page to remove all annotations from the current page.
6. Save your edited PDF — Click "Save Edited PDF" to export all pages with your annotations embedded as a downloadable PDF file.

Annotation Tools Explained

🖱 Select

Click any annotation to select it, then move, resize, or delete it. Press the Delete key on your keyboard to remove a selected annotation instantly.

T Text

Click anywhere on the page to add an editable text label. Double-click the text to edit it directly on the canvas. Adjust font size and color from the toolbar before clicking.

✏️ Freehand Draw

Click and drag to draw freely on the page — useful for circling elements, adding signatures, or sketching quick annotations. Set pen color and stroke width before drawing.

🖊 Highlight

Click and drag to place a semi-transparent colored rectangle over any area — perfect for highlighting text sections, form fields, or important data. Adjust opacity from the toolbar.

▭ Rectangle & ⬭ Ellipse

Draw precise rectangular or elliptical outlines around any content. Useful for calling out specific areas, labeling sections, or creating visual emphasis in reports.

➜ Arrow

Click and drag to draw a directional arrow pointing at specific content. Great for review feedback, instructional annotations, and pointing out changes in documents.

⌫ Erase

Click any existing annotation to remove it immediately. Switch back to Select mode to move or resize annotations instead of deleting them.

Key Features

• 7 annotation tools: Text, Draw, Highlight, Rectangle, Ellipse, Arrow, and Erase — covering every common annotation need.
• Per-page annotations: Each page stores its annotations independently. Navigate freely and edits are preserved.
• Undo support: Remove the last annotation with one click without affecting the rest of the page.
• Custom colors & sizes: Full color picker and stroke width control for every tool.
• Adjustable font size: Choose text size from 12px to 48px for clear, readable labels.
• Highlight opacity: Control transparency of highlights from 10% to 100%.
• 100% browser-based: PDF.js renders pages, Fabric.js powers the canvas editor, and jsPDF assembles the output — all locally on your device.
• No watermarks: The exported PDF contains only your original content and annotations.
• All devices: Works on desktop browsers. Mobile use is supported but a larger screen is recommended for comfortable editing.

Common Use Cases

📝 Reviewing & Marking Up Documents

Add comments, arrows, and text labels to contracts, reports, or proposals before sharing them with colleagues or clients. Highlight key sections and circle areas that need attention.

🎓 Annotating Academic Papers

Highlight important passages, add marginal notes as text labels, and draw arrows connecting related sections across a research paper — all without leaving your browser.

📋 Filling Simple Form Fields

For non-interactive PDF forms (scanned or flat), use the Text tool to type values into the appropriate fields and save the completed form as a new PDF.

🖊 Adding a Handwritten Signature

Use the freehand Draw tool to sign your name directly on any PDF page — ideal for quick approvals, consent forms, and informal agreements.

📐 Providing Design or Layout Feedback

Use arrows, rectangles, and text labels to annotate design mockups or layout PDFs with precise, visual feedback before sending them back to a designer or team.

Frequently Asked Questions

Conclusion

Annotating and editing PDFs should be fast, private, and free. With seven annotation tools, per-page memory, full color and size controls, and zero file uploads, this tool covers every common PDF markup scenario directly in the browser.

No watermarks. No registration. No cost. Scroll up, drop your PDF in, and start editing in moments.