Jimaku

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.