Free AI Video Subtitle Translator

Translate video subtitles and web pages. Read bilingual captions and choose Google or your own AI provider.

Free to install and open source. Experimental keyless Google needs no API key. Optional AI and Google Cloud services use your own account and may charge for usage; no paid API credits are included. Translate available captions on supported desktop videos. Choose original, translated or bilingual text, adjust size, contrast and position, and use English or Turkish controls. Pick from 30 source/target languages. Provider support for a language can vary. This limited preview supports accessible HTML5 video text tracks and experimental desktop YouTube captions. Enable original CC and explicitly allow automatic YouTube access, then refresh. Timed tracks can prepare captions ahead; visible-text fallback cannot. Videos without accessible captions are not transcribed. Picture-in-Picture, iframe players and video-element fullscreen are unsupported. Choose experimental keyless Google or your own Google Cloud, OpenAI, DeepSeek or Gemini key/profile. Paid services need your account and quota. Only specific endpoints/models are supported; live account qualification remains incomplete. Keyless Google is undocumented and can stop working. No automatic paid fallback. Translate visible page text as you scroll and restore originals. The page-edge glass button toggles page translation; hover for status and More options. Its settings let you make it compact, hide it temporarily/on this site/everywhere, or control the selection marker. Automatic logo display requires explicit site access. A small marker appears beneath selected text by default on activated pages. Showing it sends nothing; click it to request translation. Manual selection can include ordinary text inside forms, code, buttons and translate=no regions; editable fields and hidden text are excluded. Automatic translation after selection remains off unless separately enabled and uses stricter exclusions. Optional Alt-hover previews, plain text-field translation and AI Writing use your selected provider. Writing requires an AI profile. Field changes need explicit Apply; forms are not submitted automatically. Rich editors and PDFs are unsupported. The single-page popup brings languages, subtitles, page translation and providers together. Provider and languages can also be changed from the player menu. Language changes apply to running subtitles without asking you to restart. Requested text goes directly to your selected provider. No project backend or analytics. Keys use session storage unless you explicitly choose device retention. Delete keys/cache and revoke site/provider access at any time. Device storage is not encrypted by this extension. Page/writing results stay out of the persistent caption cache. See the privacy notice for retention and controls. Version 0.2.8 supports visible captions in recognized Vidstack, Video.js, Shaka UI and HTML5 Plyr layouts, including the Vidstack layout used by DeepLearning.AI. Turn on original CC before enabling translation. This mode translates captions as they appear. On video-focused pages, the edge button toggles subtitles, while the hover menu keeps page translation available. Signed-in course playback qualification remains incomplete. Version 0.2.8 adds a Subtitle style page in the player menu for display mode, background, position and font size. Subtitle controls now stay synchronized during quick repeated clicks and show clearer setup/access errors.