By the end of this guide you will have a finished video in which an AI avatar presents your script, with a matching voice, simple scenes and captions, exported as a file you can share. To make a video with an AI avatar you use an avatar video platform: you pick or create a presenter, paste a script, adjust the scenes and render the result without a camera or crew.
The AI handles the on-screen speaker and the voice. You are still responsible for a good script, for permission to use anyone's likeness, and for checking the final video before it goes out. This guide compares six tools from our Video category and shows the steps that apply to all of them.
Key takeaways
- Write a short script, choose an avatar and voice, build the scenes, preview and fix the pronunciation, then render and export.
- The main decision is the use case: marketing and localized videos (HeyGen), presenter-led training (Synthesia, Colossyan, Elai.io), a single talking face from an image (D-ID), or UGC-style product ads (CreateUGC).
- Free plans exist but add watermarks or short limits: HeyGen's Free plan allows 3 watermarked videos a month, and Elai.io's Free plan gives 1 minute of video.
- Only create an avatar of a real person with their consent, and disclose that the presenter is AI where viewers would expect to know.
What you need before you start
- A script. A few hundred words for a short explainer is plenty. Write it for the ear: short sentences, no hard-to-pronounce abbreviations.
- A purpose and an audience. Training video, product explainer, sales outreach or social ad each calls for a different tool.
- An account. Most platforms have a free plan or trial.
- Optional assets. Logo, brand colours, slides or a product link, depending on the tool.
- Time. Under an hour for a first short video. Rendering time depends on the platform.
- Difficulty. Easy.
- Consent. If you create an avatar from a real person's face or voice, you need that person's clear permission.
Which kind of AI tool fits this job
Pick by what the video is for.
Marketing, localization and general use. HeyGen lets you pick an AI avatar, paste a script and get a spokesperson video. It also offers Custom Video Avatars from your own likeness and voice, and translates video into 175+ languages and dialects.
Presenter-led training and internal communication. Synthesia produces presenter videos from a script, PDF, PowerPoint, web link or prompt, with scenes you edit like slides and a Brand Kit. Colossyan is aimed at employee training and exports courses as SCORM to a learning management system. Elai.io builds slides narrated by a digital presenter from a prompt, link, PowerPoint or PDF and supports quizzes, branching and an analytics view.
A single talking face from an image. D-ID animates a still face into a speaking presenter. You upload a portrait or pick an avatar, then type a script or upload a voice recording.
UGC-style ads for products. CreateUGC takes a product link from a marketplace such as Amazon or AliExpress, suggests a script and generates videos with a realistic AI avatar, including avatars that hold the product.
Step 1: Write the script and decide the length
A tight script makes the video; the avatar just delivers it.
- State the goal of the video in one sentence.
- Write the script in short, spoken sentences, one idea per scene.
- Read it aloud to catch tongue-twisters and unclear phrases.
- Spell out acronyms and numbers as you want them spoken.
Check it worked by reading the script aloud in one go without stumbling.
Step 2: Choose a platform for your use case
The right tool depends on the output you want.
- For a marketing video or translation, start with HeyGen.
- For training that needs slides, quizzes or SCORM, compare Synthesia, Colossyan and Elai.io.
- For one talking portrait, try D-ID.
- For product ads, look at CreateUGC.
- Compare the limits in the table below against your video length.
Check it worked by confirming the plan lets you export a video of the length you need. D-ID, for example, limits output to 5 minutes.
Step 3: Pick or create the avatar
The presenter sets the tone, so choose one that fits your audience.
- Browse the avatar library. HeyGen lists 500+ ready-made presenters, and Colossyan lists 300+ stock avatars.
- If you want to appear as yourself, use a custom avatar, such as HeyGen's Custom Video Avatar. Colossyan lists studio-filmed custom avatars as an add-on.
- For D-ID, upload a portrait that you have the right to use. Uploaded images are capped at 10 MB.
- Never create an avatar of someone else without their permission.
Check it worked by previewing a short sentence with the chosen avatar.
Step 4: Add the script and choose the voice
Now the avatar learns what to say.
- Paste your script into the editor, or import a document if the tool supports it. Synthesia accepts a script, PDF, PowerPoint, web link or prompt, and Colossyan accepts a PDF, PowerPoint, Word file or web page.
- Choose the language and a voice. Colossyan lists 700+ stock voices, and D-ID supports 119 languages with accents and speaking styles.
- Use voice cloning only for your own voice or with permission.
- Set the script into scenes, one idea per scene.
Check it worked by playing the first scene and hearing the right language and tone.
Step 5: Build the scenes and add visuals
Visuals keep viewers watching.
- Add a background, slide or product shot to each scene.
- Apply your brand colours, fonts and logo. Synthesia and HeyGen both list brand features.
- Add on-screen text or captions for key points.
- For training content, add quizzes or branching where the tool supports them, as Colossyan and Elai.io do.
Check it worked by scrolling through the scenes and finding no empty or cluttered ones.
Step 6: Preview, fix pronunciation and timing
Never render before you listen to the whole thing.
- Play the full video preview with the sound on.
- Respell names or terms the voice mispronounces, or adjust punctuation to change the pacing.
- Trim scenes that run long.
- Check that captions match the spoken words.
Check it worked by hearing every name and number pronounced correctly.
Step 7: Render, export and disclose
Rendering uses your plan's credits or minutes, so do it once the preview is right.
- Render the video. Credits and minutes reset on each billing period and often do not roll over.
- Download the file at the resolution you need. HeyGen lists 1080p or 4K on higher plans.
- Add a note that the presenter is AI generated where your audience would expect to know.
- Keep the script and project so you can update the video later.
Check it worked by playing the downloaded file from start to finish on another device.
Tools for this job compared
| Tool | Good fit for | Pricing | Stated limits |
|---|---|---|---|
| HeyGen | Marketing videos and translation, on web and API | Freemium, paid from $29/mo (checked 24 Oct 2026) | Free plan allows 3 watermarked videos a month, up to 1 minute each; experience is better on a computer than on mobile |
| Synthesia | Presenter-led training and internal videos | Freemium, paid from $29/mo (checked 24 Oct 2026) | Free Basic videos carry a watermark; unused credits do not roll over |
| Colossyan | Training courses with SCORM export | Freemium, paid from $59/mo (checked 24 Oct 2026) | Starter limits videos to 20 minutes and 40 scenes; minutes do not roll over; API not on Starter |
| D-ID | A talking face from one image | Free trial | Output up to 5 minutes; images up to 10 MB; trial videos carry a full-screen watermark |
| Elai.io | Slides with a digital presenter, quizzes and analytics | Freemium, paid from $29/mo (checked 24 Oct 2026) | Free plan gives 1 minute; no pay-as-you-go; unused minutes do not roll over on monthly plans |
| CreateUGC | UGC-style product ads from a marketplace link | Free trial, paid from $19.9/mo (checked 24 Oct 2026) | Fixed monthly credit allowance; trial ends after 30 credits or 3 days |
Prices and plan limits change, so confirm the current terms on each vendor's site before you subscribe.
Common mistakes to avoid
- Using someone's likeness without consent. A face or voice clone of a real person needs their permission. Fix it by getting written agreement, and use stock avatars when in doubt.
- A script written for reading. Long sentences sound stiff when spoken by an avatar. Fix it by writing short sentences and reading the script aloud first.
- Rendering before checking. Credits and minutes are limited and may not roll over. Fix it by previewing the full video and correcting pronunciation before you render.
- Ignoring watermark and length limits. Free plans often add watermarks or cap the length. Fix it by checking the plan limits against your video before you commit.
- Hiding that the presenter is AI. Viewers may feel misled, and some contexts expect disclosure. Fix it by adding a short note on the video or its page.
How we put this together
This is an evidence-based guide built from each tool's listing in our directory, which is compiled from the vendor's own site and pricing page. It is not a review based on using the tools. We don't rank tools, and nobody paid to be included. Some outbound links may be affiliate links; see our disclosure.
Frequently asked questions
Is there a free way to make an AI avatar video?
Yes, within limits. HeyGen's Free plan allows 3 watermarked videos a month, Synthesia has a free Basic plan with a watermark, Colossyan's Starter plan is free, and D-ID lists a 14-day free trial. Elai.io's Free plan gives 1 minute of video.
How long does it take to make an avatar video?
The tools do not publish a standard rendering time. As a rough editorial estimate, a short video from a ready script fits in under an hour including preview and fixes. Longer videos with many scenes take more time to review.
Can I create an avatar of myself?
Some tools offer it. HeyGen lists Custom Video Avatars made with your own likeness and voice, Colossyan lists custom avatars and voice cloning, and Elai.io lists selfie avatars. Check each listing for the plan that includes it.
Can I make avatar videos in other languages?
Yes. HeyGen translates video into 175+ languages and dialects, Synthesia lists voiceovers and captions in 140+ languages, and Colossyan lists translation into 100+ languages with lip-sync. Have a fluent speaker check the result.
Is it ethical to use an AI presenter?
It can be, with care. Get consent for any real person's likeness or voice, avoid impersonating others, and tell viewers when a presenter is AI generated where they would expect to know.
Compare more options in our Video category.
