Free Chrome extensions

Small tools for studying that never phone home.

Five extensions built for students. Each one runs entirely on your computer: no server, no account, no analytics. Install one, or all five.

No server
No account
No tracking

Pacer

Lecture Video Speed Controller

Speed, silence skipping and volume boost for every lecture video.

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Deep Focus

Site Blocker & Pomodoro

A focus timer that actually blocks the sites you list.

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Marker

Highlighter & Notes

Highlight any page, add notes, keep it forever.

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Recall

Flashcards with Spaced Repetition

Flashcards from any page, scheduled with FSRS.

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Citepad

Citation Generator

Correct citations from any page, in one click.

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Why local-only?

Study tools see what you read, watch and write. Keeping that on your own computer is the simplest privacy policy there is. Every extension here exports its data as a file, and removing it deletes everything.

Questions or a bug? support@studyfox.pro