Private Video Translation

Exactly where your data goes

Video picture

Never leaves your device

Audio

Sent over HTTPS in chunks of about 30 seconds for transcription, translation and voice

Results

Deleted from our servers once your browser has them — within 30 minutes at most

Stuck jobs

Expired after 24 hours and deleted the same way

Account record

File name, length, languages and credits used

Training

Your audio and text are never used to train models

Who this matters to

• HR and internal communications with recordings of staff.
• Researchers bound by ethics approvals and consent forms — see research interview transcription.
• Companies translating unreleased product videos.
• Anyone translating personal or family videos.

Tip: the file name is stored with your job history, so name sensitive files neutrally (session-04.mp4) before uploading.

Regulated data

mydubly minimises what it handles, but if your organisation requires a data processing agreement, specific certifications or data residency before using a processor, contact us first and check your own policies.

How it works

1. Drop in a video. Your browser reads it and pulls out only the audio — the video file never leaves your device.
2. The audio is processed in 30-second chunks: speech is transcribed and the spoken language is detected automatically.
3. Each segment is translated into your chosen language.
4. The translation is read aloud in the voice you chose, and each line is fitted to the original timing — sped up by at most 1.15× with natural pitch.
5. AI vocal separation removes the original speech, and the translated voice is mixed over the remaining music and effects, which dip automatically while the new voice speaks.
6. Your browser combines the original picture with the new audio and saves an MP4.
7. Download the results. Audio and text on our servers are deleted after delivery, within 30 minutes at most.

What you get

Translated video

MP4 with your original picture and the translated voice over your original music and effects (MKV when the original video codec can't go in an MP4)

Translated audio

M4A with the same mix: translated voice over your original music and effects

Transcript

Plain text (.txt) of what was said

Timestamped transcript

Every line prefixed with its time, e.g. [12:04]

Subtitles

SRT and VTT, in the language you select

Pricing

Transcript and subtitles

1 credit per minute (0.1¢), minimum 5 credits per file

Translated voice (includes everything above)

50 credits per minute (5¢), minimum 2 minutes per file

Credits

$1 buys 1,000 credits; credits don't expire

Free credits

100 credits when you sign in with Google

Three verified facts, and what each means for you

Transfer

Between your browser and mydubly over HTTPS

Deletion

Uploaded files and outputs are deleted within 30 minutes of the job ending

Final merge

The translated voice and your original picture are combined in your browser, on your device

Each has a practical consequence. Because outputs are deleted within 30 minutes, the only lasting copies are the ones you download, so save everything you need before you leave the result screen. Because the translated video is assembled in your browser, the finished MP4 is created on your own machine and lands wherever your browser saves files. And HTTPS protects the transfer itself; it says nothing about who else uses your computer or where the result is shared afterwards. How the browser swaps the audio track explains the merge step in detail.

Before you process sensitive footage

1. Check consent. If your consent forms or policies say recordings may only be processed by named services, confirm an outside tool is allowed before uploading anything.
2. Process only what you need. If one section of a long recording needs translating, trim the file to that section first.
3. Decide whether you need a voice at all. Transcript mode returns text files only, with no dubbed video or audio to store and manage.
4. Stay with the job and download straight away; outputs are deleted within 30 minutes of the job ending.
5. Save downloads where your organisation keeps the source footage, not in a personal folder that syncs elsewhere.
6. Delete local files you won't use, such as the translated audio if you only distribute the MP4.

What this page does not claim

Beyond the three facts above, mydubly makes no security or compliance claims here: no certifications, no audit reports, no promises about specific storage locations. If your organisation requires any of those before a processor handles footage, raise it before uploading, not after. Questions to ask any cloud speech service is a useful list to take to your own privacy or security team, and for research projects, the ethics questions for AI transcription covers what a review board may ask.

Habits on shared and managed computers

The merge happening in your browser means the finished file is only as private as the machine it lands on. A few checks are worth a minute:

• Find out whether your downloads folder syncs to a cloud drive. If it does, change the save location for sensitive jobs or move the files afterwards.
• On a shared computer, clear the downloads and sign out of any accounts you used when you're done.
• Preview a dub on headphones in an open office; a translated voice is easy to overhear.
• Share the result through your organisation's own storage with access controls, rather than as an email attachment that gets forwarded.
• Keep a short note of which files were processed, when, and in which mode, if your team documents how recordings are handled.

Worked examples

Choosing the right tool page

Most sensitive work is either translating internal video or transcribing interviews. For staff communications, translating internal company videos covers town halls and policy videos; for recorded conversations, see interview transcription and meeting transcription. If no one needs a translated voice, the video to text converter does the same transcription without the dub. For footage your policy says must never reach any outside service, the honest alternative is a tool that runs entirely offline on your own machine, weighed against the setup and hardware it needs. Language pages such as Polish cover what reviewers should check in the target language.