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The PDF Reader for Research

Use it for FREE on your iPhone, iPad or Mac today.

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Unlock advanced features by becoming a Pro subscriber. A free trial is available in the app.

A 12.9 inch iPad Pro showing Highlights with a PDF and notes open side-by-side.

Your Smart Research Tool

Turns your PDF annotations into powerful notes.

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Export Anywhere

It's your notes, you decide where they go.

You can also export as Markdown, TextBundle, HTML, WebArchive and PDF files.

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Annotate Faster

Highlights is built with you who annotate a lot in mind and the tools are where you want them. No additional taps through menus.

If you want to go even faster you can set the default annotation color for each tool and even double tap the Apple Pencil to switch tool.

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Lookup Citations

Automatically find DOIs for scientific articles and download the correct metadata.

Markup a citation and tap the link icon to look it up. If you have already read the citation Highlights will link it to the PDF on your device.

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Customize Appearance

Highlights supports dark mode and custom accent colors on all your devices.

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"... an app that students, academics, and anyone who does substantial amounts of PDF-based research should try"

- John Voorhees,

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"It’s the novel approach to PDF annotation that makes this app a cut above the rest"

- Joe White,

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App Store star rating

Average rating of 4.6 in the App Store.

"Best PDF annotation tool out there"

- Ramon Rempel, Mac App Store Canada

"Incredible. The best PDF reader for compulsive note takers I’ve ever used"

- matty98384, App Store UK

"I've literally been waiting for something this simple to use and effective for adding notes to academic PDFs for ages."

- Smidge17, Mac App Store UK

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Document Browser

Browse your files using the iOS document browser or the Finder on your Mac. Store your files on device, in iCloud Drive, Dropbox or other sync service.

Continue working on the same file on another device using Handoff. Highlights stores your annotations as standard annotations and does not lock your PDF files in.

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Multilingual OCR

Extract text from PDFs without searchable text using built-in OCR. Highlights supports a range of languages and does all processing on device.

Highlights can also recognize tables and with Smart Copy you can convert them on the fly and paste the data right into a spreadsheet.

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Smart Copy

Smart Copy gives you the desired output for any annotation when you copy it. No additional steps required, just paste it where you want it.

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Images as PNG

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Tables as CSV

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Citations as BibTeX

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And Much More..

See the full feature list

Try Highlights for Free!

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