How do I translate a video with AI for free?

1. Upload your MP4, MOV, or WebM file. 2. Choose the language you want to translate into and a male or female voice. 3. Our AI transcribes the audio, translates it, and generates an AI-dubbed voice timed to your video. 4. Download the dubbed video and subtitle files. No software and no account required, and there's no watermark.

Which video formats and sizes are supported?

You can translate MP4, MOV, and WebM files up to 500 MB and 10 minutes long. If a file is larger or longer than that, trim or compress it first and try again.

How many languages can I translate into?

82 languages, each with a natural male and female AI voice. The list keeps growing as we add voices, so the picker shows the current set.

What does AI dubbing mean?

Dubbing replaces the original spoken audio with a new voice in your target language. Our AI generates a natural-sounding voice from the translated transcript and re-times it to your video, so it sounds like the video was recorded in that language.

Do I get subtitles too?

Yes. Every translation comes with two subtitle files you can download: a source SRT in the original language and a translated SRT in your target language. Use them to caption the video or fine-tune the text.

Does it clone my voice or lip-sync the video?

Not yet. This version dubs your video with a natural preset AI voice. It doesn't clone the original speaker's voice and doesn't lip-sync the mouth movements. Voice cloning and lip-sync are planned for a later release.

Is it free, with no watermark or sign-up?

Yes. Translating and dubbing your videos is free. You don't need an account, and we add no watermark to the output.

Are my videos handled securely?

Yes. We encrypt your files in transit, process them on secure servers, and delete them automatically after your translation is ready. We never share your videos with third parties.

AI Video Translator - Free, No Watermark, No Sign-Up

How it works

How to translate a video with AI in 3 steps

Turn any video into a translated, AI-dubbed version in three steps.

Upload your video

Drop in an MP4, MOV, or WebM file (up to 500 MB and 10 minutes), then choose your target language and a male or female voice.

AI transcribes, translates & dubs

Our AI transcribes the spoken audio, translates it into your chosen language, and generates a natural AI voice timed to your video.

Download your dubbed video

Get the dubbed MP4 back in minutes, along with source and translated subtitle files. Download and share anywhere.

Learn More

Accurate dubbing, real reach, full privacy

See how SlideSpeak transcribes, translates, and dubs your videos with AI.

Accurate transcription from real audio

Our AI listens to the spoken audio in your video and produces a precise transcript. It handles accents, background noise, and multiple speakers, so the translation starts from a solid base.

82 languages with natural AI voices

Dub your video into any of 82 languages, each with a natural male or female AI voice. Reach viewers in their own language without re-recording a word or hiring a voice actor.

Private and auto-deleted

We encrypt your video in transit, process it on secure servers, and delete it automatically once your dub is ready. We never share your files.

Free, no watermark, no sign-up

The AI video translator is free, with no account and no watermark on your output. Upload, pick a language, and download the dubbed video plus subtitles.

Features

Why choose SlideSpeak?

Accurate, fast, and honest. Our FREE tool to transcribe, translate, and AI-dub any video.

Accurate AI transcription

Speech-to-text trained on real-world audio captures every word, even with accents and background noise.

82 languages

Translate and dub video audio into 82 languages, with meaning and tone preserved.

Fast turnaround

Transcription, translation, and voice generation run on our servers, not your browser. Most clips finish in minutes.

Natural AI voices

Lifelike male and female AI voices re-voice your video with proper pacing and intonation.

Keeps your original timing

Adaptive re-timing fits the translated voiceover to your video's pacing, so the dub lines up with the action instead of rushing or lagging.

Subtitles included

Download source and translated SRT subtitle files alongside your dubbed video, ready to caption or edit.

Languages

Translate your video into 82 languages

Dub your video with a natural AI voice in any of these languages, plus dozens more.

…and 59 more languages, each with natural male and female AI voices.

Performance

Fast, reliable dubbing at any video length

Most videos process in a few minutes. Our server-side engine transcribes, translates, and dubs in parallel, with no waiting on your browser.

1–3 min

Typical turnaround

Languages

Watermarks

Free

No sign-up needed

Comparison

How We Stack Up

See why users choose SlideSpeak to translate and dub their videos.

Features		Synthesia	HeyGen	Rask AI
Free to use	Free	Free trial	Free trial	Free trial
No watermark	No watermark	On free plan	On free plan	Varies
Sign-up required	No sign-up	Required	Required	Required
Downloadable subtitles	Source + translated	Varies	Varies	Included
Natural AI voices	Included	Included	Included	Included
Price	Free	Paid	Freemium	Freemium

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FAQ

Frequently Asked Questions

Everything you need to know about translating and dubbing videos with AI.

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Free AI Video Translator