Studying and reading research papers
Mark the parts you want to come back to. The highlighted PDF stays readable in any reader, and you can re-open it on a tablet without losing your marks.
Highlight PDF
Highlight text and key sections in a PDF. Drag across what you want to mark, then download the highlighted copy.
Maximum 1 file, 100MB
Select a PDF file to highlight
How it works
Three steps to a marked-up copy you can share with notes already on the page.
1
Open your PDF
Drop a single PDF up to 100 MB. Pages render in your browser, so the highlighter works on whatever is on screen, including scanned documents.
2
Drag across what you want to mark
Click and drag to draw a highlight over a sentence, a paragraph, or a whole section. Add as many highlights as you need across any pages.
3
Download the highlighted PDF
Click Download and the highlights are baked into the page. Anyone opening the file sees them right away, in any PDF reader, on any device.
What people use it for
Reviewing contracts and quotes
Flag the clauses or line items that need a second look before signing. Send the marked copy back so the other side knows exactly where to look.
Sharing notes with a team
Highlight what matters in a report or spec before forwarding it. Saves the back-and-forth of explaining where the important bits are.
Prepping for a meeting or class
Skim a document once, highlight what you'll reference, and walk in with the PDF already cued up.
Data Security
Your files are safe.
Your files stay private
Every conversion runs in an isolated container. Your download link expires after 1 hour. After that the file is inaccessible to everyone, including us. Permanent deletion follows within 24 hours.
No account. No tracking.
No email, no login, no cookies beyond what the site needs to function. Convert and leave. We have no record you were here.
Free because of ads, not your data
We earn from advertising. We have no interest in your files, your metadata, or your conversion history. Trusted by users since 2021.
Links expire in 1 hour · deleted in 24hNo account requiredNo data selling
Frequently asked questions
Baked in. When you click Download, the highlights are flattened into the page. They show up in Adobe Reader, Preview, Chrome, Edge, and any other PDF viewer without needing this tool again.