Jimaku

AI subtitle translation for Prime Video. Unofficial — not affiliated with Amazon.

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.