Highlighter is an open-source browser extension that enables users to highlight text on any website using multiple colors. Highlights are stored locally, ensuring privacy and offline access. It is ideal for users who want to annotate web content without cloud dependencies.
In the Browser DevTools & extensions space, Highlighter takes a focused approach. It focuses on highlighting and managing important text on any website without relying on cloud storage. It is built as an open-source project for web users who want to annotate and highlight online content. Highlighter is open source under the MIT license. Highlighter is available on the web and embeddable surfaces.
alvarocavalcanti builds and maintains Highlighter, and the product first shipped in 2025. Development happens publicly on GitHub with 8 commits in the last 90 days. PulseGate's similarity index finds few close equivalents — Highlighter occupies a relatively distinct niche. Key capabilities include text highlighting, multiple colors, and local storage.
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