Chalkline — AI explainer video generator: whiteboard videos from a prompt

How it works

There is nothing to learn. You describe, Chalkline makes, you ask for changes.

Describe the video

"How a refrigerator works." "Why the sky is blue." An exam question with its answer. Pick a length from 40 seconds to 3 minutes and a voice.

how an mRNA vaccine works↑

LENGTH Medium · 2 minVOICE Male

Chalkline writes, draws, speaks

A short lecture with concrete facts. A drawing of every object it names, painted for this video if the library has none. A narrator timed to the words.

A frame from the mRNA vaccine video: ribosome, spike protein, cell

Within days, the mRNA strand degrades in the cell.

Ask for changes

"More technical." "Shorter." "Add the dates." Reply under the video and get a revised one in the same thread, with the earlier version kept.

make the immune response the focus

Here it is V2 · 119 S

Samples

Three fields, three one-line prompts, nothing edited afterwards. Nothing loads until you press play. See them all.

VIDEO 1

How caffeine wakes you up1:57 · the mechanism, not the myth

VIDEO 2

Why onions make you cry1:33 · everyday chemistry

VIDEO 3

What SEO actually is1:45 · the business side

What you get

A finished piece, not a draft to fix. Pick one.

01
A 1080p MP4Narration mixed in, subtitles alongside.
02
The scriptScreen by screen, to check every fact.
03
Drawings for your topicOne style: dark line, flat colour.
04
A conversationEvery revision keeps the earlier cut.
05
OwnershipCourses, YouTube, products, clients.

▶1:12 / 1:59CC⛶

1920 × 1080 · H.264 · mrna-vaccine.mp4 + subtitles.srt

01 · The problem: virus invades

A virus arrives with spike proteins on its surface. These spikes let it grip your cells and infect them. Your immune system must learn to recognize spikes.

06 · Vaccine versus real virus

Without the vaccine, your body sees the spike for the first time during real infection. With the vaccine, your antibodies are ready before the virus arrives.

07 · The mRNA is broken down

Within days, the mRNA strand degrades in the cell. It never enters your DNA or changes your genes. Only the antibodies remain, watching for the spike protein.

The script sits under every video. Read it before you publish.

Drawing: white blood cell — white blood cell

Painted for the topic, then kept, so the next video on it starts faster.

how an mRNA vaccine works

Here it is V1 · 119 S

make the immune response the focus, add how long the mRNA lasts

Here it is V2 · 119 S

Reply under the video. Version one stays in the thread.

MP4

mrna-vaccine.mp41920 × 1080 · 3.3 MB

Download

SRT

subtitles.srtone line per sentence

Download

YoursPublish it, teach with it, put it in a product, sell it. No attribution, no per-view fee.

Where people use it

TeachingNotes become lessons students replay.

TrainingProcedures become videos new hires finish.

CreatorsOne line becomes a channel-ready explainer.

Exam prepOne question, one video, the trap in each option.

Customer helpSetup and FAQs answered on video.

Small businessHow-tos without a studio or a week of waiting.

About Chalkline

Chalkline is an AI explainer video generator. It turns a prompt, a page of lesson notes or an exam question into a whiteboard explainer video: a narrated, subtitled 1080p MP4 with pictures drawn for the topic, made in about a minute. Teachers use it to turn notes into lessons, trainers to turn procedures into onboarding videos, creators to turn ideas into YouTube explainers, and businesses to answer how-to questions on video instead of in text. Videos are landscape 16:9 in English today; every video you make is yours to publish, teach with or sell. Chalkline is built by one person, Nickesh Paudel.

Explain anything,on video.