DownSub - Subtitle & Transcript Downloader

Download YouTube subtitles & transcripts (SRT/VTT/TXT), translate to 100+ languages. Pro: AI summary, dual subtitles, playlist.

Download YouTube & Viki subtitles in one click — SRT, VTT, or TXT — and translate to 100+ languages, all free. DownSub adds a clean "Download" button right where you need it: next to YouTube's share/save bar, or inside the Viki player control bar. No URL copy-paste, no third-party sites. ━━━━━━━━━━━━━━━━━━━━━━━━━ SUPPORTED SITES ━━━━━━━━━━━━━━━━━━━━━━━━━ • YouTube (youtube.com, youtu.be) — full caption library + auto-translated • Viki (viki.com) — all fan-translated languages on every episode ━━━━━━━━━━━━━━━━━━━━━━━━━ FREE FEATURES ━━━━━━━━━━━━━━━━━━━━━━━━━ • Download subtitles in SRT, VTT, plain text, or text-with-timestamps • YouTube: auto-translate to 100+ languages via YouTube's own translation engine — never costs credits • Viki: download every fan-translated language available on the episode • Full transcript panel with click-to-seek timestamps and live search • Dual subtitles: show two languages stacked on the player at once — perfect for language learners (works on both YouTube and Viki) • Copy transcript to clipboard for notes, blogs, or LLM prompts • Smart filename: video title + language + format • Strip non-speech tags ([Music], [Applause], (laughs)…) for clean reading • Dark / light theme that follows YouTube's appearance • UI available in 20 languages: English, Tiếng Việt, 日本語, 한국어, 中文 (简体 / 繁體), Español, Français, Deutsch, Português, Русский, Bahasa Indonesia, ไทย, العربية, हिन्दी, Italiano, Türkçe, Nederlands, Polski, Filipino ━━━━━━━━━━━━━━━━━━━━━━━━━ PRO FEATURES (with DownSub account) ━━━━━━━━━━━━━━━━━━━━━━━━━ • Auto-download every video you open — pick your preferred subtitle language once in Settings, then never click again. The file lands in Downloads while you watch. • AI Summary — bullet points with timestamps in your preferred language. Pick a style: timeline, key points, action items, technical, educational, movie/novel (with optional spoiler-free mode). Works on YouTube and Viki. • AI Translate (Viki) — translate any subtitle track to your language via DownSub's AI, since Viki has no native auto-translate • Comments analysis (YouTube) — sentiment breakdown, top topics with quotes, and highlighted top comments • Coming soon: audio → subtitle, playlist batch download ━━━━━━━━━━━━━━━━━━━━━━━━━ WHO IT'S FOR ━━━━━━━━━━━━━━━━━━━━━━━━━ • Language learners watching K-dramas, C-dramas, and Asian shows on Viki — bilingual overlay shows your native language under the original • Language learners who want bilingual captions or translated transcripts on YouTube • Students & researchers turning lectures into searchable notes • Content creators repurposing YouTube content into blogs / scripts • Anyone who hates wading through 30-minute videos for 2 minutes of insight • Archive-builders who want a subtitle copy of every video they watch — set Auto-download once and let it run in the background ━━━━━━━━━━━━━━━━━━━━━━━━━ PRIVACY ━━━━━━━━━━━━━━━━━━━━━━━━━ DownSub only requests access to youtube.com, viki.com (+ api.viki.io), and downsub.com — no <all_urls>, no tracking, no ads. Your subtitles are downloaded straight from YouTube/Viki to your machine. AI features run on DownSub's own servers; nothing is shared with third parties. DownSub is a first-party extension from the team behind downsub.com. ━━━━━━━━━━━━━━━━━━━━━━━━━ SUPPORT ━━━━━━━━━━━━━━━━━━━━━━━━━ Got a question, bug report, or feature request? Open the "Support" tab at the top of this page and post it there — we read every message and reply within 24 hours. For anything else, visit https://downsub.com.