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AI Hashtag Generator

Suggest specific and broad hashtags from your caption with on-device AI, sized to each platform's limits.

Free, no uploads, no sign-up. Runs 100% in your browser.

How AI Hashtag Generator works

Everything is drawn or encoded on your device, so drafts stay private until you post them. A small AI model runs on your device in a background worker, with progress and a Cancel button. It downloads once and is cached. If your device is slow or offline, a quick mode gives a result without any download. The model compares your caption with phrases from it and a built-in topic list.

Input: Text. Output: Text.

How to use AI Hashtag Generator

  1. Paste your caption or description.
  2. Pick the platform.
  3. Press Suggest hashtags.
  4. Untick any you do not want and copy.

Tips

  • Video tools encode on your device, so short clips finish much faster.
  • Square and 4:5 sizes take the most space in feeds. 9:16 is for stories, reels and shorts.

AI Hashtag Generator FAQ

Are my files uploaded?
No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
Is it free? Are there limits or watermarks?
Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
Does it work offline?
Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Related tools

  • Post Length Checker: Check your post against the limits of X, Threads, Bluesky, LinkedIn, Instagram, YouTube and more, and split long posts into threads.
  • YouTube Title & Thumbnail Preview: See your thumbnail and title in the home feed, search, sidebar and on a phone, compare up to three versions and check where titles get cut.
  • Caption Styler: Turn SRT captions into bold short-form captions with word highlight, then burn them into your video or export ASS.
  • Audiogram Maker: Turn a podcast or voice clip into a shareable video with a moving waveform, cover art and a title.

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