AI Voice Generator
Create, Clone &
Transform Any Voice
Create voices that have never existed—by describing them. Clone any voice with just 10 seconds of audio. Or choose from 400+ voices in 140+ languages. All indistinguishable from human.
Synthesys AI voice generator creates, clones, and transforms human-quality speech across 400+ voices and 140+ languages — used by Fortune 500 companies for ads, podcasts, audiobooks, and e-learning at scale.
Trusted by global enterprise teams
What is an AI Voice Generator?
An AI Voice Generator creates, clones, and transforms human-sounding speech using advanced neural voice models. Synthesys powers voice production for Fortune 500 companies, content creators, and global brands — design entirely new voices by describing tone, age, and emotion, or clone any voice with just seconds of audio.
Choose from 400+ studio-quality voices across 140+ languages for voiceovers, dubbing, and audio production at scale. Pair any voice with AI avatar videos for complete video production without cameras or crews.
Everything You Need for AI Voice Creation
Text-to-Speech
Convert any text into natural-sounding speech instantly with 400+ voices.
Voice Design
Describe any voice—AI creates it from scratch. No audio needed.
Clone Any Voice Instantly
Clone your own voice or any voice with just a few seconds of audio data.
Speech-to-Speech
Change your voice into another character while keeping the original emotion.
Remixing
Adjust the style and emotion of the generated audio after creation.
Create Conversations
Create realistic conversations with multiple different voices in one track.
Acting Instructions
Add nuance like laughs, sighs, and breaths for human-like performance.
Translation
Automatically dub your content into 140+ languages with native accents.
How It Works
Generate professional voiceovers in 3 simple steps.
Select Voice & Input Text
Choose from our library of 400+ voices or upload your cloned voice. Paste your script into the editor.
Customize & Generate
Adjust pitch, speed, and pauses. Click generate to create your AI voiceover in seconds.
Download & Publish
Export your audio in high-quality MP3 or WAV format, ready to be used in your projects.
Most voiceovers render in under 60 seconds — from script to finished audio, ready for ads, courses, or podcasts.
What You Can Create with Synthesys AI Voice Generation
Podcasts
Create full podcast episodes with multiple speakers and consistent hosts without recording.
Audiobooks
Turn written manuscripts into long-form narrated audiobooks with emotive storytelling voices.
E-Learning
Create clear, articulate narrations for training videos and educational courses.
IVR Systems
Create professional phone greetings and menu prompts for your customer support lines.
Compare the Value
Studio voiceovers cost $65 per minute and take weeks. Synthesys delivers in minutes for $0.09 — 1,800 times cheaper with instant delivery.
Traditional voiceover costs $65 per minute. Synthesys AI generates equivalent quality at $0.09 per minute — a 99% cost reduction with unlimited revisions included.
- Reduce production costs by up to 99%
- Instant delivery vs weeks of wait time
- Unlimited revisions at no extra cost
Supported Languages
Voice + Video
AI voices power every video format in the Synthesys platform. Here's how they connect.
Avatar Videos
Clone your voice and pair it with AI avatar presentations. Your avatar speaks with your voice — training, sales, and updates without filming.
Multilingual Dubbing
Voice cloning feeds directly into AI dubbing. Your cloned voice speaks 140+ languages while preserving your unique vocal identity across every translation.
Commercials & Ads
Consistent brand voice across AI commercials, spokesperson videos, and every ad format — without re-recording per campaign.
Social Content
Add voiceovers to UGC videos, TikTok ads, and product showcases. One voice across every social channel.
What Teams Are Saying
"Their AI models are incredibly advanced — so realistic it's almost impossible to tell they're AI-generated. The quality has consistently improved."
Dr Yara Loua
Healthcare Professional · Verified Trustpilot Review
"I rely heavily on Synthesys to help me stay ahead with marketing across my three businesses. It handles everything I used to outsource."
Randy Cole
Business Owner · Verified Trustpilot Review
"My clients can't tell they're not real people — the lip-sync is spot on. It's become a core part of how we deliver client presentations."
Jexter N
Agency Professional · Verified Trustpilot Review
"The AI-powered features are game-changers — the auto-generated scripts and voiceovers save me so much time."
Michael Mubi
Marketing Manager · Verified Trustpilot Review
"I can clone myself and my voice, then easily create a lot of short clips without re-filming or redoing anything. Massive time saver."
Thomas
Content Creator · Verified Trustpilot Review
"Created a welcome video and 3 course videos in one sitting. The software made the whole process flawless — I'm hooked."
Bonnie Williams
Course Creator · Verified Trustpilot Review
"My avatar can easily translate my message into many other languages. It does a great job reaching audiences I couldn't before."
Joseph Wood
International Marketer · Verified Trustpilot Review
"The AI voice generator is great for creating videos at work. Their AI image and video editors make everything seem more professional and polished!"
Bruna Duarte
E-commerce Brand Owner · Verified Trustpilot Review
Have questions? We have answers.
Find everything you need to know about getting started, managing your account, and creating professional AI videos.
How realistic do the AI voices sound?
Natural enough that listeners can't reliably distinguish them from human recordings in blind tests. The AI captures pacing, emotion, inflection, and the subtle breath patterns that make speech sound human — not the robotic monotone of older text-to-speech systems. This matters for professional applications: podcast voiceovers need to hold attention for 30+ minutes, video ad narration needs to sound persuasive, audiobook chapters need emotional range, and e-learning modules need clear, engaging delivery. The voice quality holds up across all of these. If you're replacing studio recording time, the output is indistinguishable for most commercial uses.
Can I clone my own voice?
Yes. Upload just 10 seconds of clear audio and the AI creates a digital replica of your voice — capturing your tone, timbre, speaking rhythm, and vocal characteristics. From there, generate unlimited new speech in your cloned voice without recording anything. This is how executives scale their presence (weekly updates without filming), content creators maintain consistency (same voice across hundreds of videos), and brands build audio identity (one voice across all touchpoints). You need legal rights to any voice you clone — your own voice is always fair game, but cloning someone else requires their explicit permission.
What's voice design, can I create a voice from a text prompt?
Yes. Describe the voice you want in plain language — age, gender, accent, tone, energy level, personality — and the AI generates a custom voice matching your description. No audio sample needed. Write "warm female voice, mid-30s, slight British accent, conversational but professional" and the system creates exactly that. This is ideal for building brand characters, fictional narrators for audiobooks, unique spokespeople that don't exist in reality, or creating a consistent brand voice that isn't tied to any real person. You can iterate on the description until the voice matches your vision.
What's the difference between voice cloning and voice design?
Voice cloning starts with a real voice — you provide a 10-second audio sample, and the AI replicates that specific person's vocal characteristics. The output sounds like that person speaking new content. Voice design starts with a text description — you describe the voice you want, and the AI creates a new voice from scratch. No audio sample, no existing person to reference. Use cloning when you want to scale a specific person's voice (your own, a spokesperson, a brand ambassador). Use design when you want to invent a voice that doesn't exist yet (brand characters, fictional narrators, audio logos). Both produce the same output quality.
Can I use Synthesys for text-to-speech?
Yes — it's one of the core features. Paste any script and the AI converts it to natural voiceover in seconds. This works for short-form content (15-second ad spots, social media voiceovers, notification audio) and long-form content (full audiobook chapters, hour-long course narrations, podcast episodes). No length limits on most plans. The text-to-speech engine is the same technology powering the avatar videos and dubbing features, so the voice quality is identical whether you're generating standalone audio or voiceovers for video content. You can also adjust speed, emphasis, and emotional tone per paragraph.
What languages and accents are available?
Over 140 languages with 400+ voice options. Major languages include English (US, UK, Australian, Indian), Spanish (Latin American and European), French, German, Japanese, Portuguese (Brazilian and European), Chinese (Mandarin and Cantonese), Italian, Swedish, Arabic, Hindi, Korean, Dutch, Turkish, and many more. Regional accents within each language let you match your target audience precisely — a podcast targeting Australian listeners uses a different accent than one targeting US audiences, even though both are English. For brands operating internationally, this means consistent audio quality across every market without managing multiple voice talent relationships.
What's speech-to-speech transformation?
Think of it as a voice changer for existing recordings. Upload audio in one voice and transform it into a different voice — changing the speaker while preserving the original pacing, emotion, and timing. The new voice follows the same cadence and emphasis patterns as the original recording. Practical uses: dubbing content where you want to replace the speaker, anonymizing interview subjects for sensitive reporting, swapping placeholder voiceovers with final voice talent, or creating alternate versions of existing audio for A/B testing. The transformation is quick — upload, select the target voice (from the library or a cloned voice), and generate.
Can I use these voices commercially?
Full commercial rights on every Synthesys plan. YouTube monetized content, paid ads on any platform, client deliverables, online courses you sell, podcast distribution, audiobook publishing, IVR phone systems, app interfaces, and any other commercial application. No royalties, no attribution requirements, no per-use fees. The license is perpetual — audio you generate today is yours to use and distribute indefinitely. This includes agency use: if you're producing voiceovers for clients, you can deliver without additional licensing conversations. Some competing tools restrict commercial use to premium tiers or charge per-minute licensing — Synthesys doesn't.
How fast can I generate audio?
Most voiceovers render in under 60 seconds. Paste your script, select a voice (or use your cloned voice), and hit generate. A 5-minute narration is typically ready in 30-45 seconds. A 30-second ad spot renders almost instantly. For comparison: booking a voice actor takes days for scheduling alone, plus studio time, direction, and post-production. Even if you have a home studio setup, recording and editing a clean 5-minute voiceover takes 20-30 minutes minimum. With Synthesys, you can generate an entire audiobook chapter's worth of narration during a coffee break — and iterate on delivery until it's exactly right.
What are the best use cases for AI voice generation?
The highest-ROI applications are YouTube voiceovers (consistent quality without recording every video), online courses (narrate entire curricula in days instead of months), podcast production (intros, outros, and episode narration), TikTok and Instagram ad voiceovers (fresh audio for every creative variation), audiobook narration (full-length books in hours instead of weeks), and IVR phone systems (professional hold messages and menu prompts). Agencies use it to scale client work without booking studio time. E-learning teams use it to build multilingual training libraries. Content creators use it to maintain a daily posting schedule without losing their voice.
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AI Voices Today
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