Curiosity, put to work.
Tools to understand technology. Ideas for everyday life.
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Some questions deserve more than a conversation. We build tools, explore ideas and share what we learn. Here are six projects from Precisit, from the inner workings of AI to the possibilities of space.
TensorLens
Look inside the model.
An AI model can contain billions of numbers. TensorLens helps you see how they fit together. Explore model structure, inspect weight distributions and compare models on Hugging Face without downloading the entire model. Especially useful for comparing different quantizations of the same model.
Research preview · English-language site
Behind the project
The TypeScript application reads file headers and selected tensor ranges directly in the browser. Web Workers handle decoding and statistics, making large model files explorable a piece at a time.
TypeScript · HTTP Range · Web Workers
PasskeyDemo
Beyond the password.
What actually happens when you sign in with a passkey? Try real registration and sign-in flows, then follow the exchange between browser and server. PasskeyDemo makes the mechanics of passwordless authentication visible.
Free educational tool · English-language site
Behind the project
Astro pages and Preact demos use the browser’s WebAuthn API directly. A backend verifies the responses, while the Ceremony Inspector lets you examine them on both sides.
Astro · WebAuthn · Hono
CORS Labs
Make sense of the browser.
The request reached the server. Why can’t your code read the response? CORS Labs explains cross-origin requests through experiments you can run yourself, with browser results and server reports side by side.
Free educational tool · English-language site
Behind the project
Interactive examples make real cross-origin requests to an API. Astro and MDX provide the explanations; a separate report channel reveals what reached the server when the browser hides the response.
Astro · Preact · Hono
Pratsam
So much to talk about.
A memory, a small discovery, something that happened today. Pratsam explores an AI conversation companion reached through an ordinary telephone. A complement to human contact, built around the familiar act of making a call.
In development · Swedish-language site
Behind the project
The current interest site uses Astro and TypeScript, with a signup flow for early interest. The telephone conversation service is still being developed; the site introduces the idea and invites early interest.
Astro · TypeScript
Kanslist
More time for your community.
Running a Swedish housing cooperative means neighbours taking responsibility for their shared building. Kanslist explores how an AI assistant could help its board with recurring questions, documents and follow-up. The idea comes from our own board experience.
In development · Swedish-language site
Behind the project
The interest site combines Astro with a Preact signup form and shared TypeScript contracts. The proposed assistant and its integrations are under development; the examples show the intended experience.
Astro · Preact · TypeScript
C3planner
When should we leave for Mars?
A different departure date can mean a very different journey. C3planner explores launch windows and the energy needed to travel between bodies in the solar system. A new version of one of our earlier space projects, with the calculations moved into the browser.
Exploration tool · English-language site
Behind the project
A TypeScript Lambert solver computes transfer orbits in a Web Worker. D3 turns the results into an interactive energy map, helping you compare departure dates and travel times. The orbital data comes from NASA/JPL, including asteroid orbits from its Small-Body Database.
TypeScript · D3 · Orbital mechanics
What are you curious about?
We enjoy turning interesting questions into useful things.
Let’s talk about yours.