A great voiceover can carry a whole video — and a robotic one can sink it. CelestiAI's Voice Maker turns typed text into natural speech, with Thai-first voice models and English (plus 20+ more languages) built in. Whether you need narration for a video, a voice for an ad, or a clean read for a reel, here's how to get it done in a few minutes.
What you'll need
- A free CelestiAI account.
- Your text — a script, a caption, a product description, or a paragraph you want spoken.
- A sense of the tone you want: calm, energetic, warm, authoritative.
Step 1: Open Voice Maker
From the voice tools, choose Voice Maker. You get a simple text-to-speech workspace: a text box, a voice selector, and a generate button. No audio engineering required.
Step 2: Paste your text
Drop in what you want spoken. Write it the way it should sound:
- Punctuation is pacing. Commas, periods, and dashes tell the voice where to breathe.
- Short sentences sound more natural than long ones.
- Spell out tricky names phonetically if the voice stumbles.
If you're building a voiceover for a video, keep it aligned to your scenes — one idea per sentence.
Step 3: Pick a voice and language
Choose your language and a narrator that fits. Natural Thai and English voices are the core of the library, with Japanese and 20+ other languages available. Preview a few options — the same line can land very differently depending on the voice.
Match voice to context:
- Ads and promos: brighter, higher-energy reads.
- Explainers and tutorials: clear, steady, friendly.
- Documentary and story: warmer, slower, more measured.
Step 4: Generate the voiceover
Press generate. CelestiAI renders natural speech from your text in seconds. You'll get an audio file you can download and drop into your editor, or use directly inside CelestiAI's video tools.
Step 5: Download or use it in a video
Download the audio for use anywhere — Premiere, CapCut, your podcast, a presentation — or pair it with a motion template so your voiceover ships as a finished video.
Where Voice Maker fits best
- Faceless video narration. Generate the read, then animate the script.
- Ads and product promos. Test several voices for the same script quickly.
- Reels and Shorts. Quick, clean voiceover without recording gear.
- Accessibility and localisation. Produce an English version and a Thai version of the same message.
Tips for natural results
- Write for speech, not reading. Read your text aloud first; fix anything you stumble on.
- Use phonetic spellings for brand names and acronyms the voice might mispronounce.
- Keep one voice per series. Consistent narration builds a recognisable channel identity.
- Pace with punctuation. A period buys a beat; a comma keeps momentum.
Common mistakes
- Over-stuffing sentences. Long, comma-less sentences sound rushed.
- Mismatched energy. A sleepy voice on a hype promo feels wrong — preview before committing.
- Ignoring pronunciation. Test names and numbers up front.
Going further: cloning and the API
When the stock library isn't enough, CelestiAI lets you clone your own voice from one clean clip and reuse it as your narrator, and the same voice technology is available through a Voice API if you're building it into your own app. But for most voiceovers, the Voice Maker library is more than enough.
Wrapping up
Voice Maker gives you studio-quality narration from plain text, in Thai and English, in minutes. Paste, pick a voice, generate, and drop it into your video or ad. If you want it to sound like you, the next step is voice cloning.
Try Voice Maker free at celestiai.co — natural speech, no recording booth.