Automatic subtitles and translation for every video

Add subtitles to a video in three steps

1. Upload your video. Automatic captions are created from the speech in the video.
2. Check and edit the subtitles in the editor, line by line, if you want to.
3. Translate the subtitles into any of the 24 standard languages with one click, or upload your own SRT or VTT file.

Automatic captions, a transcript from video to text and subtitle translation in one place: no separate subtitling or captioning software, and no video translation service to hire.

How it works

1. Upload. StreamZilla detects the spoken language automatically.
2. Subtitles and transcript. Both are created straight away, while the video is being prepared in every quality up to 4K.
3. Check and edit. Correct names and jargon in the editor, or upload your own subtitle file instead.
4. Translate. Let StreamZilla translate the subtitles into the languages your audience speaks.
5. Publish. Viewers choose their language in the player. You choose whether the transcript is published with the video.

Automatic video transcription

Every video gets a full, time-coded transcript: the spoken text of the whole video, as readable text. You can edit it, publish it next to the video and search inside it from your library.

• For search engines and AI search. A published transcript makes every word in your video findable, by Google, Bing and AI assistants alike.
• For your viewers. Some people read faster than they watch, some cannot hear the audio, some want to quote you. The transcript serves all of them.
• For your team. Find the moment someone said something, across your whole library, by searching for the words.

AI video translation into many languages

Reach viewers in their own language without a translation agency. StreamZilla translates your subtitles with machine translation that runs on our own infrastructure in the EU. Viewers choose their language in the player; you can review and correct every translation first.

That turns one video into a European video: a product explainer for every market, a lecture for international students, a public announcement for everyone who lives in your city, whatever language they speak at home.

Standard translation languages: English, Dutch, German, French, Spanish, Italian, Portuguese, Polish, Swedish, Danish, Finnish, Estonian, Latvian, Lithuanian, Czech, Slovak, Slovenian, Hungarian, Romanian, Bulgarian, Greek, Irish, Arabic and Chinese.

Any other language you can add yourself: upload a subtitle file in SRT or WebVTT, and viewers can choose it in the player like any other language.

Why it matters where the AI runs

Most transcription and translation services send your audio to a cloud AI provider, often outside Europe, sometimes with the right to use it to improve their models. For a board meeting, a patient explainer, a lecture or an internal announcement, that is a data transfer you have to justify.

StreamZilla keeps it in-house. The models run on our own infrastructure in the EU, no external AI service sees your media, and nothing is used for training. Under the AI Act, automatic subtitles and machine translation are minimal-risk applications, and you can review and edit every subtitle we generate.

Subtitles and the European Accessibility Act

Since 28 June 2025, the European Accessibility Act applies to a wide range of digital products and services in the EU. Public sector bodies have been bound by the Web Accessibility Directive for longer. Both point to the same standard: WCAG. Captions for prerecorded video are success criterion 1.2.2, level A: the very minimum.

Automatic subtitles make that minimum easy to meet for every video, not just the important ones. Check them before you publish: speech recognition is good, but names and jargon deserve a human eye.

When a specialist subtitling service is the better choice

• You need broadcast-quality subtitles with full human quality control, for television or cinema.
• You need live captions during a live event. For live streaming, our parent company Jet-Stream helps you until it arrives in StreamZilla.
• You need certified or legally verified transcripts.