How to Find Trending Hashtags for Instagram & TikTok — Free

Hashtags remain one of the most effective distribution levers available to organic content creators. On TikTok, the algorithm actively uses hashtags as signals to determine which audience segments to serve your video to in the first wave of distribution. On Instagram, hashtags directly determine whether your post appears in hashtag search pages and Explore tab recommendations. Using the wrong hashtags — or none at all — means your content is only seen by people who already follow you, with no path to new discovery.

The challenge is that hashtag effectiveness is not static. A hashtag that drove significant impressions six months ago may be oversaturated today, buried under millions of competing posts. Staying current with which tags in your niche are trending versus overcrowded is ongoing research work — unless you use an AI tool to do it for you.

How to Research Hashtags with AI

• Describe your content
  Enter a brief description of your video or post — what it is about, who it is for, and which platform you are publishing to. The more specific the description, the more relevant the hashtag suggestions will be.
• Generate your hashtag set
  The AI analyzes your content description and produces a curated list of hashtags across multiple categories: broad reach tags with high volume, mid-tier niche tags with lower competition, and highly specific micro-niche tags with a highly targeted audience.
• Copy and apply
  Copy the full set or individual hashtags and paste them directly into your caption or comment. The tool also provides guidance on how many hashtags to use for each platform.

Hashtag Strategy by Platform

• TikTok — Use 3 to 5 hashtags. Mix one broad trending tag, two niche-specific tags, and one community tag relevant to your audience. Avoid overloading your caption with hashtags — TikTok's algorithm prefers focused signals over a long list.
• Instagram Reels — Use 5 to 10 hashtags in the caption or first comment. A mix of sizes performs better than using only large, competitive hashtags. Niche tags with 50k–500k posts are often the sweet spot for smaller accounts.
• Instagram Feed Posts — Up to 30 hashtags are permitted, but research consistently shows diminishing returns beyond 10–15 relevant tags. Quality and relevance outperform quantity.

The Mix That Works Best

The most consistent advice from creators who have tested hashtag strategies extensively is to combine three tiers: a small number of large hashtags (millions of posts) to get included in high-volume searches, several medium hashtags (100k–1M posts) where your content has a realistic chance of ranking, and a few small community hashtags (under 100k) where your content will be seen by a highly targeted, engaged audience. The AIVantage Hashtag Finder automatically structures its output across these three tiers so you can copy a ready-to-use set without manual research.