Free Online PDF Highlighter — Highlight Any PDF, No Install
You can't highlight a PDF in Chrome. You can open one and read it, sure. But try to mark a sentence, and there's nothing there to do it with. I built a PDF highlighter tool, so I hear about this one a lot. My usual answer was: install my browser extension, or install something like Acrobat. Fine advice — unless you've got a single PDF to mark up and no interest in installing anything for it. So I built a version that skips all that. It's a web page: open it, drop in a PDF, and highlight away.
2026-07-01T10:01:26.000+00:005 min read
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