Choose video
Select an MP4, MOV or WebM using Choose video. Local playback lets you check that the speech is audible. The file uploads when you start preparing a translation.
Translate speech in your video into captions and an AI-dubbed MP4. Start with a free 10-second preview: 480p, no watermark, no login.
The first 5 seconds of our English original. Same Chinese voiceover. Compare the mouth movements while the presenter speaks.
A 5.00-second excerpt from our English product demonstration with subtitles and no watermark. The excerpt ends mid-sentence. The presenter is AI-generated. Lip Sync changes the picture and may also alter facial details. It is a paid mode; free previews use Fast dubbing.
Try Lip SyncChoose subtitles to keep the original audio, or subtitles with a new AI voice. Try a short preview before translating the full video.
Select an MP4, MOV or WebM using Choose video. Local playback lets you check that the speech is audible. The file uploads when you start preparing a translation.
Select Target language. Listen to the feminine- or masculine-sounding voices, or choose Subtitles only under Output. Listen to a sample before choosing your voice.
Read the free-preview rules before submitting. A free result covers up to 10 seconds at up to 480p, without a watermark; a full conversion requires sign-in and credits.
Make a product introduction understandable to buyers who speak another language. Select Target language before generating; the same source video can be translated again for another audience. Each new full conversion uses its own credits. The available choices are:
Afrikaans, Arabic, Armenian, Azerbaijani, Belarusian, Bosnian, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Latvian, Lithuanian, Macedonian, Malay, Marathi, Maori, Nepali, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Tamil, Thai, Turkish, Ukrainian, Urdu, Vietnamese, Welsh.
Voice quality and pronunciation vary by language. Start with the free preview and check product names, technical terms and measurements. Listen to the translated voice as well as reading the captions; a familiar-looking subtitle is not proof of a correct pronunciation.
Choose Subtitles only when your original voice, music or ambient sound matters. Viewers hear the source audio and read translated captions. Paid exports include separate SRT and VTT files, useful when uploading the same edit to a video platform.
Choose Subtitles + voiceover when viewers need to hear the translation. Select and preview the voice before submitting. This replaces the whole original audio track, including background music; it does not identify the original speaker or copy their voice. Use clear single-speaker recordings, and review numbers and sentence timing before publishing.
Start with the original video file when you have it. Clear speech and a quiet recording make names, measurements, and product details easier to transcribe. If your source already has captions burned into the picture, they remain visible in Fast dubbing; use a clean copy to avoid overlapping text. Choose the target language and listen to the selected voice before generating. After the preview, check the opening sentence, product names, and any numbers against your original. For a customer-facing product demonstration, ask a fluent speaker to review the translation before publishing it.
For export sales, pay particular attention to model numbers, dimensions, materials, and instructions for use. A translated product name can sound convincing while referring to the wrong item. Compare these details with your product sheet, and keep important identifiers easy to hear in the original recording. Show the preview to someone in your target market to check whether the wording is understandable and appropriate for the audience.
Fast dubbing creates a translated voiceover while keeping the original picture and lip movements. It is the lower-credit option for narrated demonstrations, screen recordings and videos where the speaker is not always visible.
Paid Lip Sync adjusts visible lip movements to the translated speech. It costs more credits and takes longer. Use one clearly visible, front-facing speaker, and inspect the finished face and mouth movements before sharing. Both modes use a selected AI voice; neither is voice cloning. Paid plans start at $19.90 per month.
Try a watermark-free 10-second Fast dubbing preview at up to 480p. See the free-preview limits and Free vs Pro comparison, or compare paid plans and Lip Sync credit usage.
Clear answers, no small print.
The free allowance is one accepted preview per browser session, shared across this site, with no daily reset for that session. Additional limits are 2 previews per public IP and 20 site-wide per UTC day, resetting at 00:00 UTC. Each accepted task uses an allowance, including a failed task; verification does not grant extra attempts. Full videos require an account and credits.
Both free previews and paid full-video exports have no watermark. The free preview covers up to 10 seconds at up to 480p.
While processing, the editor shows an approximate remaining-time range based on video length, output type and the queue. This is an estimate, not a deadline. Length, speech density and the selected output affect the wait. An accepted task can be checked later in the same browser while its files remain available.
MP4, MOV or WebM; one video at a time, up to 500 MiB (524,288,000 bytes), 30 minutes and 60 fps. Each dimension must be at most 1920 px and the frame at most 2,073,600 pixels. A playable audio track is required. Choose a target from the language list, including English, Chinese, Spanish, French, German, Japanese, Korean, Arabic, Hindi and Portuguese. A listed choice does not guarantee equal quality across languages. For a YouTube video, upload your own authorized copy.
Free previews are watermark-free MP4s with burned-in captions, up to 10 seconds at up to 480p (fitted within 854 × 480 px). Paid full videos fit within 1280 × 720 px and include SRT and VTT files. Both keep the source aspect ratio without enlarging smaller videos. Portrait height is capped at 480 px for free previews and 720 px for full videos.
Clear, single-speaker speech is the intended use. Overlapping speakers, background noise, names and numbers need careful review. Caption timing is estimated within speech sections, not word-perfect. Fast dubbing replaces the original audio and keeps the original lip movements. Paid Lip Sync adjusts lip movements to the translated voice and takes longer. Neither mode clones the speaker or preserves a separate music track. Use subtitles only to retain the source audio.