AI Dubbing
Translate audio while preserving the speaker’s voice, or localize video with translated speech and lip sync.
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View My CreationsDia TTS AI Dubbing — Translate Audio and Video Online
Dia TTS is a browser-based AI dubbing tool that turns uploaded audio or video into translated, dubbed media. Choose Audio or Video, upload one file, and select from 18 target languages. Audio mode translates speech while aiming to retain the original speaker’s vocal characteristics and timing. Video mode creates translated speech and synchronizes visible lip movements with the new language. When processing is complete, you can preview and download the result in your browser. It can be used as an AI video translator for dubbed video or as an online audio translator for translated speech. Results may vary depending on the source language, recording quality, background noise, overlapping speakers, and facial visibility.
See It in Action
A real result generated with Dia TTS.
Example 1
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Output
Example 2
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Why Use the Dia TTS AI Dubbing
Switch between audio and video workflows based on the result you need. Audio mode produces translated, dubbed audio, while video mode produces a translated video with synchronized speech and lip movements. Each task accepts one uploaded media file.
Instead of asking you to select a completely different built-in voice, the tool aims to carry the original speaker’s vocal characteristics, delivery, and timing into the translated speech. This helps multilingual versions maintain a more consistent speaker identity. Similarity can vary, and an exact reproduction is not guaranteed.
The current page supports English, Spanish, French, German, Italian, Portuguese, Chinese, Japanese, Korean, Russian, Arabic, Hindi, Dutch, Polish, Turkish, Vietnamese, Thai, and Indonesian. In video mode, the tool also attempts to match visible lip movements to the translated speech.
There is no software to install. Audio uploads support MP3, OGG, WAV, M4A, and AAC files up to 50MB. Video uploads support MP4, MOV, and WebM files up to 100MB and 120 seconds. Audio is billed by the minute, rounded up, while video is billed by the second, rounded up. New users can sign up and use complimentary credits to try the service.
How to Translate Audio or Video with AI Dubbing
Choose a Media Type and Upload Your File
Select Audio or Video based on the output you want, then upload one file for translation and dubbing.
- •Audio supports MP3, OGG, WAV, M4A, and AAC files up to 50MB
- •Video supports MP4, MOV, and WebM files up to 100MB and 120 seconds
- •Use source material with clear speech and limited background noise
- •Avoid overlapping speakers when possible
- •For video lip sync, footage with a visible, unobstructed face is preferable
- •Divide videos longer than 120 seconds into shorter clips before uploading
Select the Target Language
Choose the language you want the translated speech to use. The current tool only asks for a target language; there is no separate source-language selector. For example, to translate a Spanish video to English, upload the Spanish video and select English. The same workflow can be used for the other supported target languages.
Generate, Preview, and Download
Review the media file, target language, and displayed billing unit, then submit the task. When processing is complete, preview the dubbed audio or translated video and download the generated result. If the first result does not meet your expectations, try source material with less noise, avoid overlapping speakers, or remove long sections of silence before generating again.
Who Uses Dia TTS AI Dubbing
Dia TTS helps creators, education teams, and businesses prepare translated audio and short-form video for multilingual audiences.
Short-Form Video and Talking-Head Localization
Translate talking-head videos, social media clips, product introductions, and short demonstrations into other languages while generating new speech and synchronized lip movements. The current video workflow supports clips up to 120 seconds.
Podcasts, Interviews, and Audio Translation
Convert podcast segments, interviews, voice instructions, and spoken content into dubbed audio in another language. Unlike an audio translator that only returns text, this workflow produces translated speech that can be previewed and downloaded.
Training and Product Demonstrations
Create multilingual versions of training segments, tutorials, course videos, and product demonstrations without recording every language version from the beginning. Longer videos can be divided by chapter and processed as separate clips.
Multilingual Marketing and Content Testing
Prepare multilingual drafts for advertisements, landing-page videos, brand introductions, and campaign content. Review the translation, voice continuity, and lip-sync quality before publishing the final version.