AI explainer video maker with voiceover
Last updated
Optimirox writes and animates short explainer videos from a plain description. Say what you want explained and who it’s for, pick one of 25+ animation styles, check every frame, and get a finished vertical MP4 with music, subtitles and an AI voiceover — ready for Reels, TikTok and YouTube Shorts.
It’s built for businesses, creators and marketing teams who need a clear 20–30 second video without a camera, a designer or an editor. If a key fact is missing, the AI asks up to four short questions; then you edit the storyboard frame by frame, for free, before anything is rendered. A video costs 24 credits with a voiceover — five videos a week on the $8 Weekly plan — and arrives in one to two minutes as a 1080×1920 MP4 up to 60 seconds long.
From a description to a storyboard
Describe the topic in your own words — “explain how our booking app works in 30 seconds, for busy parents” — and choose a style such as Chalkboard lesson, Explainer collage, Kinetic type or Tech glow. If a key fact is missing, the AI asks up to four short questions. It then writes a storyboard of 3–8 scenes: a hook, the steps or points, a key number and an end card with your call to action.
Edit before you pay to render
The storyboard plays in your browser. Change any frame’s text by hand for free, reorder or remove scenes, and switch the style, palette, music or voice. Ask the AI to rewrite a single frame — “simpler words”, “add the price”. You only spend credits on the render you decide to make.
Voiceover and subtitles in 12 languages
Choose from 6 AI voices and preview each one before you pick. The on-screen text and the voiceover can be in English, Spanish, Portuguese, German, French, Italian, Turkish, Indonesian, Vietnamese, Russian and Uzbek (Latin and Cyrillic), so one explainer can be remade for every market you sell in. Add one of 28 music tracks and subtitles in 4 styles.
What you get
A vertical 9:16 MP4 at 1080×1920, usually 20–30 seconds and up to 60, ready in one to two minutes. The animation is built from text, shapes and illustration — not stock footage or AI-generated people — so it stays sharp and on-brand. You post it yourself wherever short video plays.
How much does an AI explainer video cost?
An explainer is 24 credits with a voiceover and 20 without, and you only pay when the AI writes the storyboard and when you render — editing frame text by hand is free. Weekly’s 120 credits cover five voiced explainers a week; every plan’s price is on the pricing page.
Questions about this tool
- Can I make a horizontal 16:9 explainer for my website?
- Not yet. Videos are vertical 9:16 (1080×1920), made for Reels, TikTok and Shorts. They also work in mobile landing pages and stories.
- Do I need a script?
- No. A one-line description is enough; the AI writes the script and the storyboard. If you already have a script or a transcript, paste it in and the scenes follow it.
- Is there an AI avatar or presenter?
- No. Optimirox makes animated motion-graphics videos with a voiceover rather than talking-head avatars.