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TikTok Free Tool

TikTok Caption Generator

Generate viral TikTok captions with hashtags in seconds. Powered by AI free, no sign-up required.

The more detail you give, the better the caption

Got your caption? Now create the clip.

Paste Youtube video URL, ShortPurify cuts your long video into viral short clips, adds captions, and publishes directly to TikTok in minutes.

No credit card required · Free plan available

How to write TikTok captions that go viral

TikTok captions are limited to 2,200 characters but shorter is almost always better. The first line is the most important — it appears before the "more" cutoff and determines whether someone keeps watching or scrolls away.

TikTok caption best practices

  • Lead with a hook — a question, bold claim, or relatable statement in the first line
  • Keep the main caption to 1-3 sentences; save detail for the comments
  • End with a call to action: "Save this for later", "Comment your answer", "Follow for part 2"
  • Use 3-5 niche hashtags + 1-2 broad hashtags (avoid spamming 30 hashtags)
  • Tag trending sounds or topics to ride discovery waves

How many hashtags should I use on TikTok?

Research suggests 3-8 targeted hashtags outperform 20+ generic ones. Mix niche hashtags (under 500K posts), medium hashtags (500K–5M), and one or two broad ones (5M+) to hit multiple discovery layers.

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