Free AI Video Dubbing
Make your videos global with AI dubbing in 130+ languages and accents. Preserve the original speaker’s voice and deliver perfect lip-sync for every audience.
Translated video examples
Upload or record your video
Choose a file
Videos must be 10 to 30 seconds. Longer videos will be trimmed.
Translate to
If your video features people speaking, we'll sync their lip movements to the translated audio.
Upgrade to generate your translated video without a watermark.
Subtitles are auto‑generated for dubbed videos and viewers can toggle them on or off in the Multilingual Player.
AI dubbing supports multiple speakers and automatically preserves each speaker’s voice.
Control whether the video duration stays fixed or adjusts for translation.
By using this service, you confirm you have all necessary rights, licenses and permissions to upload and dub this content, and that your use of any dubbed content will be in accordance with the Acceptable Use Policy and in compliance with applicable regulations related to intellectual property and data privacy.
Remove watermarks and elevate your videos.
- Deliver translated videos without watermarks.
- Edit translations easily and securely.
- Dub videos in all available languages and dialects.
- Perfect for training, marketing and sales videos.
Create any type of video in minutes with AI
From lifelike AI avatars to cinematic B-roll, stock footage and 100s video templates — Synthesia’s AI video generator gives you everything to produce stunning videos.
Why Synthesia is the best AI dubbing tool
Dub videos in 130+ languages and accents
- Share your message with audiences everywhere
- Preserve the voice and rhythm of the original speaker
- Sound natural and consistent in every language
Flawless lip-sync for natural delivery
- Advanced visual dubbing keeps speech and motion perfectly aligned
- Every dubbed video syncs seamlessly with the new voiceover
- Deliver authentic, high-impact content that feels truly native
Generate subtitles for every video
- Each dubbed video comes with ready-to-use subtitles
- Switch subtitles on or off whenever they are need
- Ensure your content is easy to follow and accessible for everyone
Maintain message integrity with secure editing
- Make quick, secure script adjustments without risking the original meaning
- Correct words or timing to perfect your transcript
- Built-in safeguards ensure the message of your dubbed voices can’t be altered or misused
How to dub a video with AI in Synthesia
Dub your existing videos into new languages in minutes.
Upload your video
Add an MP4, MOV, or WebM file. Synthesia automatically detects the original language.
Choose target languages
Pick from a wide range of languages and accents, then set your dubbing preferences.
Review and fine-tune
Play each dubbed version, tweak the script for accuracy, or switch voices in the built‑in editor until it’s perfect.
Publish with one smart link
Generate the final versions and share a single player link. Viewers automatically see their language, with the option to switch at any time.
The #1 AI video platform for training, marketing and sales
"180 videos. 5 languages. 0 hassle."
“It's enterprise-ready and makes video creation easy.”
"What used to take 4 hours now takes 30 minutes."
"The platform is so easy to use and intuitive."
“We make videos fast and use them every day.”
“Updating 10,000 courses? Totally doable now.”
"100 hours of translation done in 10 minutes!"
"I don't need a third party anymore. I do it myself"
“50% faster content. Without sacrificing quality”
"Teams adopt it fast and use it across the company."
“Interactive video is redefining training for us”
“We push updates without touching the LMS.”
"We saved $56K and hit 100+ custom videos."
"With Synthesia, we get lightning-fast results."
“It’s easy to use and grows across teams fast.”
Dubbing your content is good for your business and your audience
Businesses that localize their video content are 50% more likely to see an increase in total revenue.
72.4% of consumers are more likely to buy a product with information in their own language.
Miscommunications caused by language barriers reduces business efficiency by 67%.
AI video dubbing FAQs
Which is the best AI dubbing tool?
Synthesia stands out as the best tool for AI dubbing because it offers the complete package of voice preservation, lip synchronization, and secure editing capabilities in one platform. While many tools provide basic video translation or subtitle generation, Synthesia maintains the original speaker's voice across all languages and ensures perfect lip sync, creating a natural viewing experience that feels authentic rather than artificially generated.
Beyond technical capabilities, Synthesia prioritizes safety and ease of use with built-in content moderation, collaborative editing features, and a multilingual video player that automatically serves content in the viewer's preferred language. This combination of advanced dubbing technology with enterprise-grade security and user-friendly design makes it particularly valuable for businesses that need to create professional multilingual content at scale while maintaining quality and brand consistency.
What is AI dubbing and how does it work?
AI dubbing is a technology that automatically translates and replaces the original audio in your videos with a new language while preserving the speaker's unique voice characteristics and syncing with their lip movements. This process transforms your content into multiple languages in minutes rather than weeks, making your videos accessible to global audiences without the traditional costs and complexity of hiring voice actors and recording studios.
Unlike traditional dubbing methods that require extensive time and resources, Synthesia’s AI dubbing maintains the authenticity of your original content by keeping the same voice tone and emotional delivery across all languages. This means your training videos, marketing content, or company updates can reach international teams and customers with the same impact as your original version, helping you expand your reach and improve engagement across different markets.
Is AI dubbing safe?
Yes, AI dubbing with Synthesia is designed with robust safety measures to protect your content and ensure ethical use. The platform implements rigorous content moderation at the point of creation, using advanced technology filters and human oversight to prevent inappropriate or harmful content from being created or distributed.
Synthesia's secure editing features ensure that any changes to translated scripts are moderated to maintain the original message's meaning and prevent misuse of anyone's likeness. With ISO 42001 certification for AI safety and full GDPR compliance, your data and content remain protected throughout the dubbing process, giving you confidence that your videos are translated responsibly while maintaining your brand's integrity.
How do I dub a video with AI in Synthesia?
Dubbing a video with Synthesia is a straightforward three-step process that takes just minutes to complete. First, you upload your existing video to the dubbing tool, where it automatically detects and preserves each speaker's voice, even in videos with multiple speakers. Next, you select your target languages from over 130 available options, and the AI generates translated versions that maintain your original voice characteristics and lip sync.
Once the translation is complete, you can review and edit the transcript to ensure accuracy while the platform's content moderation tools protect the integrity of your message. The final dubbed video can be downloaded, shared via a single link, or embedded using Synthesia's multilingual player that automatically plays in your viewer's preferred language, making global distribution seamless and professional.
What languages are supported?
Synthesia supports 130+ languages and dialects for AI dubbing, including right‑to‑left scripts and regional variants. Popular options include: English, Spanish, French, German, Portuguese, Italian, Dutch, Russian, Chinese (Mandarin), Japanese, Korean, Arabic, Hindi, Bengali, Turkish, Vietnamese, Thai, Indonesian, Polish, and Swedish.
What rights and permissions do I need to dub a video with Synthesia?
To dub a video with Synthesia, you must have all necessary rights, licenses, and permissions for the content you're uploading. This means you need to own the video or have explicit permission from the copyright holder to create translated versions, including rights to any voices, images, and other content appearing in the video.
When using AI dubbing for videos featuring real people, you should have their consent to translate and distribute their likeness in other languages. Synthesia's platform includes safeguards through its content moderation system and adherence to ethical AI practices, but the responsibility for ensuring proper permissions lies with you as the content creator to maintain legal compliance and respect for all parties involved.
Is AI dubbing free?
Yes, you can try Synthesia’s AI dubbing for free. Upload a video, auto‑detect the source language, and generate translated, lip‑synced versions to experience the full workflow end to end. The free experience lets you quickly evaluate voice preservation, timing, and subtitles on your own content with no complex setup.
For higher usage and scale, paid plans unlock more languages and voices, advanced editing controls, collaboration, and publishing options like smart links. These plans give teams the capacity and enterprise features needed to roll out multilingual content across campaigns, training, and product docs with confidence.
Which file formats and platforms are supported?
Synthesia’s AI Dubbing works in your web browser, no software to install. You can upload videos in MP4, MOV, or WebM.
Not just an AI dubbing tool
Synthesia is an end‑to‑end AI video platform to create, localise, manage, publish, and engage at scale. With the AI video generator and a seamless PPT to video workflow, you can quickly repurpose presentations and scripts into high‑quality, localised videos for every market.
Bring content to life with realistic AI avatars, tailor versions by audience or region, and boost engagement with interactivity, all in the same platform. From creation to distribution, Synthesia helps teams communicate visually, faster and smarter.
