Free tools for YouTube creators
A growing collection of free tools to help you grow your channel — built by Replai.
Free
Thumbnail Tester
Preview your thumbnail across 4 YouTube surfaces.
Free
Title A/B Tester
Score two titles head-to-head and see which wins.
Free account
Hashtag Generator
Generate 20 relevant YouTube hashtags from a topic.
Free
Random Comment Picker
Pick a random winner from any video's comments.
Free account
AI Reply Preview
See 3 AI replies in different tones for any comment.
Free account
Viral Comment Finder
Find your most-liked and most-replied comments.
Free account
Comment Sentiment Analyzer
Break down comments by positive, negative, questions and more.
Free account
Channel Health Check
Get a 0-100 score for your channel's comment engagement.
Free account
Response Rate Analyzer
See what % of comments you reply to, video by video.
Free account
Best Time to Post
Discover when your audience is most active.