Dub your videos into Japanese
Paste a YouTube link or upload your video. SpeakSwap dubs it into natural Japanese using AI voice cloning — your content reaches Japan's 120M+ viewers while sounding authentically Japanese. Background music stays intact. Free starter credits. No subscription.
How It Works
Paste your YouTube URL or upload a video
Works with any YouTube video or uploaded clip. SpeakSwap extracts the speech audio automatically — no manual audio editing needed.
Select Japanese as your target language
Choose from multiple natural Japanese AI voices. SpeakSwap handles kanji pronunciation, natural intonation, and pitch accent for clear, authentic Japanese speech.
Download your Japanese-dubbed audio
In a few minutes, your video is dubbed into natural Japanese. Voice cloning preserves the original speaker's tone, and background music stays untouched.
Frequently Asked Questions
Japan has one of the world's largest YouTube audiences — over 120 million Japanese speakers, with strong demand for tutorials, gaming, educational, and product review content in their native language. Dubbing into Japanese opens that market without re-recording your voiceover.
Yes. SpeakSwap uses advanced AI voice synthesis for Japanese, handling kanji, hiragana, and katakana correctly — including pitch accent and natural intonation. The output sounds natural, not robotic.
Tutorials, vlogs, product reviews, gaming commentary, educational content, interviews, and podcasts all work. For multiple speakers, give your best count estimate before submitting so the dub can preserve separate speaker paths.
Yes. SpeakSwap uses AI vocal separation to isolate speech from background audio, dubs the speech into Japanese, then mixes them back — so music, sound effects, and ambient audio stay intact.
Yes — new accounts get free starter credits to try dubbing a short clip, no credit card required. For full-length videos, pay-as-you-go packs start at $6. Credits never expire and work across every tool.
Yes. In video dubbing, smart lip sync is optional for eligible clips longer than 20 seconds and up to 90 seconds. SpeakSwap detects speakers and recurring faces, then asks you to confirm speaker-to-face matches before rendering. It is designed for real talking-head video with visible, moving faces — not a still image, slideshow, or image-to-video animation. Transcription, text-to-speech, and other audio-only tools continue to work without lip sync.
Use real talking-head footage where a person is visibly speaking and the face moves naturally. SpeakSwap can dub a still-image video as audio, but it does not animate still pictures, slideshows, or image-to-video portraits. Turn smart lip sync off for those sources and use the audio dub instead.