OSOctoSpark
Free tool

AI hashtag generator — viral tags for social media

Generate trending hashtags for Instagram, Twitter/X, and LinkedIn. On-device AI keeps your prompts private and produces platform-tuned tag sets in seconds.

Content description

Describe your post and the AI will generate platform-tuned hashtags.
Twitter / X
Instagram
LinkedIn

Max 30 tags on Instagram.

330

AI engine

Models run in your browser — your prompts never leave your device.

The model loads on your first generation and is cached for later runs.

Platform tip

Instagram

Mix popularity tiers. Drop them in the first comment to keep captions clean.

Popularity legend

High — broad reach, heavy competition.

Medium — moderate reach, healthier engagement.

Low — niche tags with the highest engagement rate.

Pro tip

Mix popularity tiers in every post — pair a couple of high-volume tags with mid-tier ones and a handful of niche tags for the best reach-to-engagement balance.

Generate viral hashtags with on-device AI

Discover the right hashtags to lift your social media reach. Whether you post on Instagram, Twitter/X, or LinkedIn, the generator produces data-driven tag sets in seconds — no signup, no server round-trips.

Hashtag generation flow

  1. 1. Describe your content. Drop in a short summary of your post, image, or video.
  2. 2. Pick a platform. Twitter/X, Instagram, or LinkedIn — each has its own cap and tone.
  3. 3. Tune the count. Use the slider to set how many tags you want, up to the platform limit.
  4. 4. Generate and refine. Copy individual tags, copy them all, or download as a file.

Platform-specific hashtag strategies

Twitter/X hashtags

  • 1–3 hashtags maximum
  • Lean into trending topics
  • Use branded hashtags sparingly
  • Join active conversations

Instagram hashtags

  • 10–30 hashtags allowed
  • Mix popularity tiers
  • Combine niche and broad tags
  • Hide them in the first comment

LinkedIn hashtags

  • 3–5 professional tags
  • Industry and skill specific
  • Include company hashtags
  • Event hashtags for live posts

Hashtag best practices

Research before using

Check what content already lives under a hashtag. Make sure it aligns with your brand and has not been hijacked for unrelated topics.

Mix popularity tiers

Combine high-volume tags with medium and niche options. That gives you both reach and engagement quality.

Stay relevant

Only use hashtags that match the post. Off-topic tags hurt your engagement and credibility over time.

Track performance

Note which tags drive saves and shares. Refine your hashtag set based on what actually moves the needle.

Frequently asked questions

Everything that matters about how these tools work, and what we do with your data.