PDF TOOLS
PDF Highlighter
Drag across text to highlight it in any colour.
Your files are processed on your device and are never uploaded.
Highlight text in a PDF like a marker pen. Drag across lines to mark them in yellow, green, pink, blue or orange, set the opacity so the text shows through, and save the highlighted PDF to share or print.
The editing is done on your device, so private documents never leave it.
How to Highlight a PDF
- Choose your PDF. The pages appear in the editor.
- Pick a colour and opacity, then drag across the text you want to highlight.
- Undo anything you do not like, then click Save PDF.
All the Tools
- Text: Type anywhere – fill in a form that has no fields, add notes or corrections.
- Signature: Draw, type or upload your signature.
- Image: Logos, stamps, photos and seals.
- Date: Today's date in one click.
- Highlight: Five colours with adjustable opacity.
- White-out: Cover a mistake, then type the correct text on top.
- Box: Frame or underline important parts.
- Redact: Permanently remove sensitive content.
Free and Private
No sign-up, no watermark and no upload. For PDFs with real form fields, Fill PDF Form lets you type straight into the fields.
Edit PDF Sign PDF Add Image to PDF Redact PDF Fill PDF Form Watermark PDF
Frequently Asked Questions
How do I highlight text in a PDF?
Choose the PDF, pick a highlight colour and drag across the text. Click Save PDF when you are done.
Can I change the highlight colour?
Yes – yellow, green, pink, blue or orange, with adjustable opacity.
Can I undo a change?
Yes. Click Undo to remove the last change before you save.
Is my PDF uploaded?
No. The PDF is edited in your browser and never leaves your device.
Is Highlight PDF free to use?
Yes. Highlight PDF is completely free, with no sign-up, no watermark and no limit on how many times you use it.
Are my files uploaded to a server?
No. Your files are processed directly in your web browser on your own device. Nothing is uploaded or stored, and the file is gone from memory when you close the tab.