Free YouTube Caption Generator
Enter your video topic and tone, and get search-ready YouTube descriptions and Shorts captions you can copy in seconds, free and right in your browser.
Captions are generated in English. The UI is available in 9 languages.
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Start freeHow to write YouTube descriptions and Shorts captions that get found
YouTube gives you roughly 5,000 characters of description space, but only the first two or three lines show above the "Show more" fold, so the opening has to earn the click and tell viewers and YouTube search exactly what the video covers. The winning structure front-loads your main keyword and topic in those first lines, then expands underneath with context, timestamps for chapters, links to your channel, products and socials, and a clear call to subscribe. Shorts play by different rules: the caption sits on top of a vertical video, so it has to be short, hook-driven and built around one searchable keyword rather than a wall of links. This generator shapes your topic into both formats so the long description reads like a real chapter-by-chapter rundown and the Shorts line stays punchy.
It runs entirely in your browser from proven description and hook structures, so it is instant, free and never sends your text anywhere. Treat the output as a strong first draft: drop in your real timestamps, swap in your channel and affiliate links, and adjust the keyword to match what people actually search for your video. Brandlix takes it from there. Its AI agent writes full YouTube descriptions and Shorts captions in your channel's voice, generates matching thumbnails and video, schedules uploads at your best times and publishes across 10 platforms, so a single video can go out as a long-form description on YouTube and a tailored caption everywhere else.
Frequently asked questions
Is this YouTube caption generator really free?
Yes. It runs fully in your browser with no signup, no limits and no cost. Generate as many YouTube descriptions and Shorts captions as you want, copy the one you like and paste it straight into your video's description field on YouTube Studio.
How long can a YouTube description be?
YouTube allows around 5,000 characters in the description, but only the first two or three lines appear before the "Show more" cut-off. Put your main keyword and the hook up top, then use the remaining space for timestamps, links and context. For Shorts, keep the on-screen caption short and built around a single searchable keyword.
How does it handle keywords, timestamps and hashtags for YouTube?
The generator front-loads your topic keyword into the opening lines where YouTube search reads it first, then drafts a description body with placeholder timestamps and link slots you fill in with your real chapters and URLs. It keeps hashtags sparse and relevant, since YouTube only surfaces the first three above the title. For descriptions written in your channel's voice and auto-scheduled uploads, use the Brandlix AI agent on any plan from FREE to BUSINESS at $199 per month.
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