TL;DR
If you already have a script, you're most of the way to an explainer video. First decide which kind you want: an avatar explainer (an AI presenter reads your script on camera) or an animated explainer (your script becomes scenes, text, icons and motion). Then tighten the script to one idea per 8 to 10 seconds, split it into scenes, generate each scene, add a voiceover and captions, and export. A 60-second animated explainer that used to take a storyboard artist and an animator a few weeks can now take one working session.
Avatar explainer or animated explainer, which do you need?
Most “script to video” tools you'll find first are avatar tools: HeyGen, Synthesia, Colossyan. You paste a script, a realistic AI presenter reads it to camera. That's a genuinely good fit for some jobs and the wrong one for others, so decide before you pick a tool.
Choose an avatar explainer when a human face builds trust: internal training, HR and compliance, onboarding from “the team”, or when you need the same video in twenty languages. Avatar tools are very good at this.
Choose an animated explainer when the idea is the star, not the presenter: how your product works, a process, a before and after, a concept that's easier to show than say. Animation can put the interface, the numbers and the diagram on screen at the exact moment the script mentions them, which a talking head can't.
| Route | What you get | Cost | Time for 60 seconds | Best for |
|---|---|---|---|---|
| Animation studio or freelancer | Custom animated explainer | €2,000 to €10,000+ per minute | 2 to 6 weeks | A flagship homepage video |
| Avatar tools (HeyGen, Synthesia, Colossyan) | AI presenter reads your script | Free plans; HeyGen Creator US$29/month or US$24/month billed annually. Colossyan Professional US$89/month or US$59/month billed annually. Synthesia paid rates vary by region. | Under an hour | Training, onboarding, translations |
| Template tools (Canva, Vyond) | Pre-built animated scenes | Canva Free; Pro pricing varies by region. Vyond offers a trial, not a free plan; Starter US$699/year. | A few hours | Simple, generic explainers |
| Prompt-to-motion (fluos) | Animated scenes generated from your script | One free build per day; credit-based Pro from US$10/month, pay what you want | One working session | On-brand product and concept explainers |
Studio figures are typical market planning ranges, not quotes. Time estimates depend on script length, revisions and complexity. Subscription sources checked October 1, 2026: HeyGen, Synthesia, Colossyan, Canva, Vyond's annual pricing and Fluos. Annual rates require annual billing, not a monthly subscription. Canva and Synthesia prices depend on your location; check your localized checkout. Taxes and usage limits may apply.
The rest of this guide covers the animated route, since that's the one with the fewest good guides.
How do you turn a script into an explainer video, step by step?
Tighten the script.
Read it out loud with a timer. People speak at roughly 150 words a minute, so a 60-second explainer is about 150 words, and most first drafts are twice that. Cut until every line earns its place. The rule that does the most work: one idea per 8 to 10 seconds. If a sentence carries two ideas, it's two scenes or it's one sentence too many.Split it into scenes.
Put a line break wherever the idea changes. Each chunk becomes one scene. A 60-second script usually lands at 6 to 8 scenes. Next to each one, write in a few words what should be on screen: ‘the invoice list, one row turns green’, not ‘something about payments’.Set the look once.
Before generating anything, decide colors, fonts, logo and the feel of the motion (snappy or calm). If you have a brand motion kit, reuse it here. Setting this once is what keeps scene six looking like scene one. See the brand motion kit guide for reusable rules.Generate the scenes from the script.
In a prompt-based tool like fluos, you paste the script and the scene notes, and the animation is built for you. Watch it in the live preview and correct in plain language: ‘hold scene three longer’, ‘make the number count up’, ‘change only scene two’. Fix one thing per message so you can see what moved. Across the first 500 videos made on fluos, the average render finished in about three minutes, so trying a second version of a scene costs you minutes, not a revision round. That historical render average is not a promise for an individual build.Check the pacing against the voice.
Record or generate the voiceover, then play it against the animation. The picture should change when the idea changes, not a beat before or after. If a scene feels rushed, the fix is almost always a shorter line, not a slower animation.Add captions and export.
Most explainers are watched on mute at least once: in a feed, in a Slack thread, on a landing page before someone clicks play. Captions aren't optional. Export MP4 for your site, social and ads, and a short GIF of the best scene for email.
You do not have to move to another tool for the audio steps: Fluos can generate narration from your exact script and add word-level synced captions when requested. Ask for both in the brief, then check the result rather than assuming captions were added automatically. MP4 exports include audio; GIF exports are silent.
What does script-to-scene look like in practice?
Here's a real-length example: an explainer script for Ledgerly, a made-up invoicing app, and the scene each line becomes. It is a starting point for a roughly 60-second video; time your own read and leave room for transitions and the end card.
| Script line | Scene on screen |
|---|---|
| “Every month, freelancers lose hours chasing unpaid invoices.” | A stack of invoices, a clock spinning fast behind them |
| “Ledgerly fixes that. Connect your bank once, and every invoice you send is tracked automatically.” | Logo reveal, then a bank icon connects to an invoice list with a line |
| “When a client pays, it's matched and marked paid. No spreadsheets.” | One invoice row flips to a green ‘paid’ tag |
| “When they don't, Ledgerly sends a polite reminder on day seven and a firmer one on day fourteen, in your tone, from your email.” | A timeline: day 7 email slides in, day 14 email slides in |
| “You see everything on one screen: what's paid, what's late, and what's coming in this month.” | A simple dashboard builds, three numbers count up |
| “Stop chasing. Start getting paid. Try Ledgerly free.” | End card: logo, one line, URL, holds for 2 seconds |
Notice what the right column does: every scene is something you can see, and none of it is decoration. If you can't describe what's on screen for a line, the line is probably too abstract to keep.
What are the most common script-to-video mistakes?
A script written to be read, not heard. Long sentences and clever clauses fall apart out loud. Write the way you'd explain it across a table.
Starting with the company, not the problem. Nobody cares who you are in second one. Open on the pain, then the fix.
Too many ideas. An explainer that explains five features explains none. Pick the one thing a viewer should remember.
Visuals that repeat the words. If the voice says “fast” and the screen shows the word “fast”, you've wasted the scene. Show the thing the words can't: the number, the interface, the before and after.
When is an AI explainer not enough?
For a flagship homepage video with character animation, illustrated worlds or a story arc, a good studio is still worth the money. The same goes if you need a real human on camera. For the explainers most teams actually need, a feature walkthrough, an onboarding clip, a concept for a sales deck, a script plus an afternoon can now get you there. If you're still picking tools, our honest roundup of AI motion graphics tools compares them side by side.
Frequently asked questions
- How do I turn a script into an explainer video?
- Tighten the script to one idea per 8 to 10 seconds, split it into scenes, note what should be on screen for each, then generate the scenes in an AI motion tool or avatar tool. Add a voiceover and captions, check the pacing, and export an MP4.
- What are the best AI tools to make onboarding explainer videos?
- For a presenter on camera, avatar tools like Synthesia, HeyGen and Colossyan. For animated explainers that show the product and the concept, prompt-based motion tools like fluos, or template tools like Canva and Vyond for simpler videos.
- How long should an explainer video script be?
- About 150 words per minute of video. Most explainers work best at 60 to 90 seconds, so 150 to 225 words. Read it aloud with a timer; pauses and delivery change the final length.
- How many scenes should a 60-second explainer have?
- Usually 6 to 8, one per idea, each lasting roughly 8 to 10 seconds.
- What's the difference between an avatar explainer and an animated explainer?
- An avatar explainer has an AI presenter read your script on camera. An animated explainer turns your script into scenes, text, icons and motion. Avatars suit training and translation, animation suits showing how a product or idea works.