Highlight a PDF Online, Free — Right in Your Browser
Drag over any part of the page to mark it with a translucent colored highlight — pick from several colors. Nothing you upload here is ever sent to a server.
Select a PDF to Highlight →How it works
Select your PDF
Select Highlighter
Drag over the text
Download
Why highlighting locally matters
This editor
- Your file never leaves your device
- No account or email required
- No file size cap
- Nothing stored on any server, ever
Typical "upload to markup" tools
- Your document sits on their server
- Usually requires an account
- Often capped on the free tier
- Retention/deletion is on their terms, not yours
Frequently asked questions
Can I choose the highlight color?
Yes — pick from several colors before placing a highlight, or change it afterward by selecting it.
Can I move or resize a highlight after placing it?
Yes — select it to drag it to a new spot or resize it, or delete it entirely.
Is my PDF uploaded anywhere to highlight it?
No. Everything happens in your browser using JavaScript. The file never leaves your device.
Is there a file size or page limit?
No. Since nothing is uploaded to a server, there's no server-side limit — the only ceiling is what your own device's memory can handle.