# Explainer3D > Explainer3D (explainer3d.com) is an AI video generator that turns a "how does it work?" question into a finished vertical 3D explainer short: isometric 3D scenes, natural voice-over and word-by-word (karaoke) captions, exported as a 1080 × 1920 MP4 ready for Instagram Reels, TikTok and YouTube Shorts. ## What it does - You type a question (for example "Why is one house's Wi-Fi faster than another?") and optionally notes about your audience. - AI researches the explanation, writes the script and builds a topic-specific isometric 3D scene for every step. - A voice-over is generated in the chosen voice, with normal or fast pacing, and captions are timed word by word. - You download a vertical MP4 plus a suggested posting caption and hashtags. ## Key facts - Output: vertical 9:16 MP4, 1080 × 1920, with voice-over and karaoke captions. - Video lengths: Short (about 45 to 60 seconds, 5 scenes) costs 10 credits; Standard (about 60 to 90 seconds, 6 to 7 scenes) costs 15 credits. - Failed videos are refunded automatically. - 17 languages for script and voice-over: English, Bahasa Indonesia, Malay, Spanish, Portuguese (Brazil), French, German, Italian, Dutch, Turkish, Vietnamese, Filipino, Hindi, Thai, Japanese, Korean and Chinese (Simplified). - New accounts get 20 free credits, no card needed. Videos made with free credits carry a small explainer3d.com watermark; paid plans remove it. - Plans (monthly credits): Starter, 150 credits (about 10 to 15 videos); Pro, 450 credits (about 30 to 45 videos). Payment in IDR (Midtrans) or USD (PayPal). Current prices: https://explainer3d.com/#pricing - Good for: educators, science and tech creators, explainer channels, marketers and anyone who wants to answer "how does it work?" questions with short-form video. ## Links - [Home and sample video](https://explainer3d.com/): product overview, sample short, how it works, pricing, FAQ - [Create a free account](https://explainer3d.com/register): 20 free credits to make a first video - [Sample short (MP4)](https://explainer3d.com/sample.mp4): 62-second example about Wi-Fi signal strength