Translate a video from Japanese to English for free
Translate videos from Japanese into English with Synthesia’s AI dubbing. We preserve the original voice and perfectly sync lip movements for a natural result.
1Add your video
Videos must be 10 to 30 seconds. Longer videos will be trimmed.
Use a YouTube video that clearly shows someone speaking.
Pick from one of our sample videos
2Translate to
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.
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How to translate a video from Japanese to English
Turn any video in Japanese into a fully dubbed, lip‑synced English video in just minutes. Follow these four quick steps to create a natural translation and reach English‑speaking viewers instantly.
Step 1: Upload your video
Drag any MP4, MOV, WEBM, or YouTube video into Synthesia. The platform will automatically detect the Japanese audio.
Step 2: Pick your target languages
Choose English and decide if you want to sync the translated audio with the speaker’s lip movements. Click Generate to start the dubbing process.
Step 3: Review and fine‑tune
Play the dubbed English track, edit the transcript if needed, or choose a different AI voice until everything sounds perfect.
Step 4: Publish with one smart link
Generate the final files in minutes and share a single player link. Viewers automatically see the English version and can switch back to the original Japanese version at any time.
Translate, edit and share your existing video library in one place
Upload your video and translate it into 29+ languages in minutes
Upload any video and get a translated version in minutes, keeping each speaker's original voice — even with multiple speakers.
Keep the original voice and adjust the lip sync
Your translated video’s lip sync will align perfectly with the new voiceover, ensuring authenticity and impact.
Make changes to the script easily and securely
Edit the transcript to correct any mistakes. Our secure content moderation keeps the message and tone intact.
Watch all your videos in one multilingual player.
Watch, organize and access all 140+ languages in a single place.
- Single share link, single player
- Autoplays in recipient’s browser language
- Easy toggle between different versions
Translating your content is good for your business, and your audiences
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%.
Why do training, marketing and sales leaders trust Synthesia?
“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."
"180 videos. 5 languages. 0 hassle."
“It’s easy to use and grows across teams fast.”
All your video translation questions answered
Can Synthesia translate a video from Japanese into English automatically?
Yes. Just upload your video in Japanese, select English as the output language, and Synthesia will automatically translate, dub, and lip‑sync the audio while preserving the original speaker’s voice.
Will the AI preserve the original voice when translating from Japanese to English?
Yes. Our voice‑cloning AI keeps the original speaker’s tone, pacing, and style, so the English version still sounds like the same person.
How accurate is the Japanese to English translation?
Synthesia uses advanced AI translation models optimized for video content. The translation is highly accurate for clear, professional speech, and you can review and make edits in the built‑in transcript editor.
How long does it take to translate a video from Japanese to English?
Most projects are ready in a matter of minutes, depending on the length of the video—significantly faster and more affordable than manual dubbing.
What types of videos can be translated from Japanese to English?
Synthesia works with MP4, MOV, WEBM, and YouTube links. It’s ideal for training courses, presentations, explainer videos, marketing clips, and more.
