0:09 / 0:20
Black Holes
A drifting starfield, a streaking accretion disk, and one quiet formula reveal why a black hole’s shadow looks larger than its horizon.
DIRECTION“Make gravity feel like invisible architecture. Sparse, precise, immense.”
PRAXINO / A STUDIO IN CONVERSATION
Ideas, brought
to light.
Put your imagination into words. Shape the scenes in conversation. Praxino turns your ideas into animated films, rendered on your own machine.
For Codex and Claude · Windows and macOS · Local rendering
THIRTEEN STYLES, PLAYING LIVE
From an idea
to a finished film.
Every example below is a Praxino scene running live in your browser: the same HTML that the renderer captures frame by frame. Narration and music join in the final film.
0:18 / 0:20
The Monty Hall Problem
Line-drawn doors, the host’s reveal, and a live tally that turns a counterintuitive answer into an obvious one.
DIRECTION“Sketch the puzzle like a glowing notebook, then prove it with 300 games.”
0:17 / 0:19
How Vaccines Work
Characters, speech bubbles, and timed panel reveals explain immune memory in under twenty seconds.
DIRECTION“Tell it as a four-panel comic with a curious B-cell as the hero.”
0:12 / 0:20
The Pin-Tumbler Lock
Cutout pieces assemble into a cross-section. The key lifts each pin to the shear line, and the plug turns.
DIRECTION“Build the lock from paper cutouts and let the key do the explaining.”
0:10 / 0:20
Fold Paper to the Moon
A counter races through 42 folds while a log-scale ladder climbs from a single sheet of paper to the Moon.
DIRECTION“Bold numbers, a brisk rhythm, and a pause at every milestone.”
0:17 / 0:22
Eratosthenes Measures the Earth
Sunlight, a well, and an obelisk’s shadow: a 2,200-year-old measurement drawn like a period engraving.
DIRECTION“An engraved plate that draws itself, one line of reasoning at a time.”
0:15 / 0:20
The Dyson Swarm
One orbiting mirror becomes a thousand, then a billion, until catching 1% of the Sun would dwarf everything humanity uses.
DIRECTION“Make the Sun feel wasteful, then build the swarm one mirror at a time.”
0:16 / 0:20
The Habit Loop
Cue, routine, reward: a stick figure and a buzzing phone explain why habits repeat, and where to break them.
DIRECTION“Draw it on a whiteboard like a teacher thinking aloud, then circle the weak spot.”
0:15 / 0:20
Why Bicycle Gears Work
A 44-tooth chainring drives a 16-tooth sprocket: one pedal turn, 2.75 wheel turns, measured on a blueprint sheet.
DIRECTION“A technical drawing that drafts itself, then turns the cranks exactly once.”
0:16 / 0:20
Life Expectancy Doubled
From 32 years in 1900 to 73 today, with the doubling point and the pandemic dip marked where the data shows them.
DIRECTION“An honest newspaper chart: start at zero, annotate the turning points, cite the source.”
0:28 / 0:30
Positive Stays Positive
An ε–δ proof written in chalk: pick ε = f(a)/2, find the δ-strip on the graph, and watch the curve stay above zero. Q.E.D.
DIRECTION“Prove it on a chalkboard like a patient teacher: statement, graph, then wipe the board and finish the proof.”
0:17 / 0:20
Where Does Rain Come From?
Painted washes show the sun lifting vapor from the sea, a cloud gathering, rain on the hills, and a river carrying the water back.
DIRECTION“Paint it like a picture-book page: let the sun warm the sea, then follow one drop all the way home.”
0:16 / 0:20
How a Seesaw Balances
A 2 kg clay ball and a 1 kg ball show that weight times distance decides the balance: 2 × 2 equals 1 × 4.
DIRECTION“Make it friendly and bouncy: clay friends hop on, the plank tips, then one slide makes it level.”
A DIRECTED CREATIVE LOOP
The interface is the conversation.
Describe what matters. Preview the scenes. Refine the details until the film feels like yours.
- 01
Give direction
Describe the audience, argument, tone, runtime, and references as naturally as you would brief a creative director.
- 02
See it take shape
Watch the animated scenes play in a live preview and refine the pacing. Preview narration voices separately before the final render.
- 03
Revise by prompt
Ask for a tighter opening, a calmer palette, or a clearer explanation. Review each revision in conversation.
- 04
Approve the render
Once the preview is right, one approval captures the frames, mixes the sound, and produces the final film locally.
PRECISE WITHOUT BEING TECHNICAL
Ask for the change you can see in your head.
Praxino preserves scene structure, style, timing, and render history while your assistant translates your direction into focused revisions.
YOU
The opening feels too literal. Make it quieter and reveal the equation before the shadow.
PRAXINO
Reworked scene 01. The equation now resolves first; the photon ring enters six seconds later. Preview ready.
1 scene revised · render history preservedYOUR CREATIVE DIRECTION
One idea.
Thirteen ways to tell it.
Choose a visual language, tune its mood and rhythm, and take the direction into your next Praxino conversation.
THE TREATMENT / Luminous Notebook
Show a smooth stream, introduce a disturbance, then build a labeled diagram explaining turbulence.
Curious, precise, and reassuring; explain unfamiliar terms before using them.
- Open with a visible puzzle.
- Introduce one mechanism at a time.
- Work through a concrete example.
- Return to the opening puzzle with an explanation.
Mathematics · Science · Technical ideas
Make it yours.
The style guides your scenes, illustrations, and sound. Video creation and rendering happen in your local Praxino conversation.
LOCAL BY ARCHITECTURE
Your machine remains the studio.
Your project files, imported media, and final films live in local folders. Frame capture and video assembly run on your computer, with local narration available by default.
Protected session
DPAPI on Windows. Keychain on macOS.
Explicit approval
Nothing renders until you approve the preview.
A record of every render
Keep the scenes, style, and settings behind each finished film.
SIMPLE PRICING
Preview freely.
Render when it's right.
Directing, previewing, and revising are always free. Plans only count final renders, the moment you approve a preview and Praxino records the film on your machine.
Free
$0 forever
4 final renders a day, resetting at midnight UTC.
- All thirteen director styles
- Unlimited scene previews and revisions
- Local Kokoro narration
- Failed or canceled renders are given back
Pro
$3 per month
Unlimited final renders, for when the ideas keep coming.
- Everything in Free
- Unlimited renders every day
- Cancel anytime from your account
- Supports continued development
VERSION 0.3.2
Your next film
starts here.
Create a free account, paste one command, and direct your first film from Codex or Claude. The command installs everything Praxino needs and connects it to your account. Run it again any time to update.
SETUP
From one command
to your first prompt.
Praxino runs on Windows and macOS with Codex or Claude (Claude Code or Claude Desktop). The install command brings Node.js and FFmpeg with it.
GOOD TO KNOW
Before you install.
How do I revise a generated video?+
Describe the change in your chat. Review the updated animated scenes, then approve a new render. Narration is added to the final film; voice samples can be heard separately.
What leaves my computer?+
Rendering and project storage happen locally. Your conversation is processed by Codex or Claude, and sign-in contacts this website. If you choose ElevenLabs, narration text or music prompts are sent to ElevenLabs. Local Kokoro narration works offline after its initial model download.
Does narration run locally?+
Yes. Local Kokoro narration is selected by default and needs no API key. Its quantized model downloads on the first voice sample, stays in Praxino's local model cache, and can synthesize offline afterward.
How do I use ElevenLabs?+
ElevenLabs is optional. Use it when you want AI narration or generated music:
- Create an API key in your ElevenLabs account.
- Give it to the Praxino installer, or run Praxino Setup again later. It is stored on your computer (Windows user environment or macOS Keychain), never in chat or a project file.
- Restart Codex or Claude so Praxino picks up the new key.
- Open a Praxino preview, choose AI voice (ElevenLabs), select Refresh ElevenLabs voices, pick a voice, then approve the render.
Local Kokoro and system voices remain available without an API key. ElevenLabs music generation requires a paid ElevenLabs plan.
How many renders do I get?+
Free accounts get 4 final renders per day, resetting at midnight UTC. A render counts when you press Approve & render; previews, revisions, and narration samples never count, and a render that fails or is canceled is given back. Pro removes the limit for $3 a month.
Why is sign-in required?+
Your account connects Praxino on your computer. Sign-in happens on this website; your projects and renders stay on your machine.