ExtensionTools

Small tools, documented honestly

ExtensionTools is a growing library of browser extensions — tools we build ourselves and tools we curate after hands-on testing — together with the documentation we would want to read as users: what each tool does, who it is for, and exactly where it stops working.

Who we are

We are a small team of extension developers. The library combines tools we build and maintain ourselves with third-party extensions we test and document — every entry gets real attention: updates, honest docs and reproducible testing on released builds. Everything written here is based on our own testing of the shipped versions, including the cases that did not work. When a page documents someone else's extension, it says so explicitly.

The tools we build are local-first: captures, recordings and annotations are processed in your browser and are not uploaded anywhere. The one deliberate exception is FlowSherpa, which uploads a recorded step list only when you choose to publish a share link — and deleting the share deletes it server-side. Curated tools state their data handling on their own pages. See the privacy policy for the details, per tool.

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PlayFrom

Chrome · v1.0.0

Start every video on your sites at the exact time you choose.

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Poindeo

Chrome · v1.1.1

Record your screen with auto zoom that follows every click.

Free & paid tiersDetails →

Editorial principles

The rules every page on this site is written under — the same ones quoted in the editorial disclosure at the bottom of each article and extension page.

  • Document as shipped

    Every feature listed is in the released version today. Roadmap items and aspirations stay off the page until they ship.

  • Tested before listed

    We install and use every extension on its released build — ours and third-party alike — before it gets a page here. No paid placements.

  • State the limits

    Each extension page carries a limitations section written with the same care as the feature list. A tool you understand is a tool you can trust.

  • Compare neutrally

    Where alternatives exist, we table them honestly — including the rows they win. If no option fits, we say so.

  • No invented trust

    No fabricated user counts, ratings or press quotes. If we cannot back a claim with something real, it does not appear.

Want to see the principles in practice?

The blog applies the same standards to guides and comparisons — including the ones where our own tools are not the best answer.