Jimaku

About

Watch Prime Video in Japanese, French, Spanish, Korean — any language you want.

 Jimaku intercepts the English subtitle track, sends it to an AI translation provider of your choice, and overlays the result directly on the player. No copy-pasting, no switching tabs.

 ── HOW TO GET STARTED ──

 1. Click the Jimaku icon on any Prime Video page.
 2. Pick a translation provider (OpenRouter is the easiest — one-click sign-in, no API key).
 3. Select your target language and press play. Subtitles appear as the AI translates them.

 ── PROVIDERS ──

 • OpenRouter — one-click OAuth, no key handling required
 • Anthropic (Claude) — paste your API key
 • OpenAI (GPT) — paste your API key

 Your key is stored only in your browser and sent only to the provider you chose. Jimaku has no backend and collects no data.

 ── MODES ──

 • Replacement mode — translated subtitles only (clean viewing experience)
 • Language-learning mode — translated and original captions both visible

 ── SUPPORTED FORMATS ──

 WebVTT · SRT · TTML / DFXP · HLS WebVTT (segmented playlists)

 ── OPEN SOURCE ──

 Source code: https://github.com/yusukeshib/jimaku

 Unofficial. Not affiliated with, sponsored by, or endorsed by Amazon.