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Free Tool
Viral Hashtags
Stop using #book. Use tags that actually target your niche readers.
Genre Selection
Tag Block
Select a genre and click generate.
AI Caption Writer?
Why just copy tags? KDP Sentinel Pro writes the entire caption for your post automatically.
Write CaptionsSocial Strategy
How many hashtags should I use?
On Instagram, aim for 20-30. On TikTok, 3-5 is better (mix broad and niche).
Do these work for Twitter/X?
Yes, but use fewer. 2-3 tags max per tweet to keep engagement high.
Viral Growth
Stop Guessing. Start Trending.
Upgrade to KDP Sentinel Pro to see which hashtags are trending RIGHT NOW.
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