# Podstr > Free open-source AI subtitle translator Podstr translates subtitle files (SRT, VTT) using AI models (Claude, Gemini, DeepSeek) via OpenRouter. Available as a web tool at podstr.cc/translate and as a Chrome extension for YouTube, ARTE, BBC iPlayer, Plex, Filmzie. ## Key features - BYOK (Bring Your Own Key) — no markup on API costs - Shared translation cache — one translates, everyone watches - 13 UI languages, translates between any language pair - Supports SRT and VTT subtitle formats - No sign-up required for BYOK mode ## Links - Web tool: https://podstr.cc/en/translate/ - Chrome Web Store: https://chromewebstore.google.com/detail/iophagcapjpmkcpdjkfndpdakipokeih - GitHub: https://github.com/aveleazer/podstr - Telegram: https://t.me/podstrcc