Thank you to everyone who gave this a spin! It’s now available to everyone on desktop. Happy…

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Now in Labs: Full-screen messaging on web

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Hi there, it’s @elt, your friendly neighborhood engineer. Whether you use Tumblr Premium or not, I’d…

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Hey there 👀 @jubs here…

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Now in Labs: Message Requests

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This is now rolling out on Android! Let us know if you notice any weirdness.

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Now testing: Best comments first

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Coming soon to the mobile apps: Inbox tab in Activity

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The new settings area is now rolling out to everyone on Android. This will no longer be a Labs…

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Now in Labs on Android: Settings redesign

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Launch Day

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Where’s that comment?

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Tumblr Hack Day, March 2026 Edition

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Tumblr Engineering

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Tumblr Hack Day, January 2026 Edition

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Tumblr Hack Day, September 2024 Edition

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Tumblr Hack Week, January 2024 Edition

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alias please=sudo

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Tumblr Hack Week, September 2023 Edition

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StreamBuilder: our open-source framework for powering your dashboard.

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