AI Hashtag Generator
Generate relevant hashtags for Instagram, TikTok, X, LinkedIn, and YouTube in seconds — free on-device AI, no sign-up, and nothing leaves your browser.
Platform
Hashtag style
How It Works
Describe your post
Drop in your caption, blog intro, video description, or product blurb — up to 5,000 characters. Nothing is sent anywhere.
Pick a platform
Instagram (30), TikTok (6), X / Twitter (3), LinkedIn (5), YouTube (15), or General (20). The preset chooses the recommended count.
AI extracts themes
DistilBART runs in a Web Worker right in your browser, summarises your text, and a deterministic ranker turns the themes into hashtag candidates.
Copy tags or block
Tap a chip to copy one tag. Use Copy all for the whole block, or download a .txt file — all in the browser, no server involved.
Hashtag Counts by Platform
Each social platform rewards a different hashtag strategy. Use this guide alongside the platform presets:
| Platform | Recommended count | What works |
|---|---|---|
| 15–30 per post | Mix broad reach tags with 3–5 niche tags relevant to your content category. | |
| TikTok | 3–6 niche tags | Quality over quantity. Pair one trending tag with several specific niche tags. |
| X / Twitter | 1–3 tight tags | More than three hashtags reduces engagement. Use the most precise tag. |
| 3–5 professional tags | Keep tags topical and industry-specific; avoid playful or CamelCase styles. | |
| YouTube | 10–15 SEO tags | Tags in the description help discovery — focus on long-tail keywords. |
How to Use the AI Hashtag Generator
- Paste your caption, blog excerpt, video description, or product blurb into the input area.
- Pick the platform you are posting to — the count is set automatically.
- Pick a hashtag style (mixed, lowercase, or CamelCase) to match your brand voice.
- Click Generate Hashtags.
- Tap any chip to copy a single tag, or use Copy all for the whole block.
- Click Reset to start over with new content.
Key Features
- Six platform presets — Instagram, TikTok, X / Twitter, LinkedIn, YouTube, and General, each with the right recommended count.
- Three formatting styles — mixed case, lowercase, and CamelCase — for any brand voice.
- Runs 100% in your browser — your post copy never leaves your device; nothing is uploaded to a server.
- AI-powered theme extraction — DistilBART picks out the most important topics before ranking, so tags are relevant rather than just frequent.
- One-tap copy per tag — pick the specific hashtags you want without copying the whole block.
- Offline after first load — the model (~343 MB) downloads once and is cached in IndexedDB.
When to Use an AI Hashtag Generator
- Launching a new product — pull the right discovery tags from your launch copy in one click.
- Repurposing content across platforms — the same blog post can become 30 Instagram tags, 3 X tags, and 15 YouTube tags without thinking about it.
- Scheduling a content batch — generate tag sets for a week of posts in minutes rather than hours.
- Local-business marketing — combine AI-extracted niche tags with your own location tag for the best reach.
- Brand keyword research — see which themes the AI keeps surfacing in your copy and use them as your brand keywords.
How the AI Extracts Hashtags
Under the hood the tool uses two cooperating stages, both running entirely in your browser:
- Theme extraction. DistilBART, a distilled version of Facebook's BART summarisation model, condenses your input into a short summary that captures the most important topics. This is the same model used by the AI Text Summarizer.
- Hashtag ranking. A deterministic ranker tokenises both the summary and the original text, removes stopwords and short words, weights the AI-summarised tokens 3× higher than raw-input tokens, dedupes, and interleaves the highest-ranked multi-word phrases for variety.
Because the second stage is fully deterministic, the same input + platform + style produces the same hashtag list every time — so you can iterate on your caption without the tag set jumping around unpredictably.
Frequently Asked Questions
Is my post text uploaded to your servers?
No. Your text never leaves your device. The AI summarisation step and the hashtag extraction both run inside your browser using Transformers.js — nothing is sent to or stored on any server.
How many hashtags should I use on each platform?
Recommended counts vary by platform: Instagram up to 30, TikTok 3–6 niche tags, X / Twitter 1–3 tight tags, LinkedIn 3–5 professional tags, and YouTube 10–15 SEO tags. The platform presets pick the right count automatically.
Why is the first generation slow?
The first time you generate hashtags, your browser downloads the DistilBART AI model (~343 MB) and saves it locally. After that one-time download the model loads instantly from local storage and works offline.
What is the maximum input length?
Up to 5,000 characters of caption, post, or product description text. For most social posts you only need 1–3 sentences for the AI to extract relevant hashtags.
Does it work offline?
Yes. After the model is downloaded on your first use, it is cached locally in IndexedDB. You can generate hashtags with no internet connection.
Which AI model is used?
DistilBART (distilbart-cnn-12-6) by Facebook / Hugging Face — runs as a quantised ONNX model via Transformers.js using WebAssembly. The same model powers our AI Text Summarizer, so the download is shared if you have used either tool before.
Why does the generator not work in Safari?
Safari’s JavaScript engine does not eagerly free WebAssembly memory, and the ~343 MB DistilBART model reliably exhausts the tab’s memory budget. Use Chrome, Brave, Firefox, or Edge.
Will the same input always produce the same hashtags?
Yes — the second-stage ranker is fully deterministic, so the same text + platform + style returns the same hashtag list every time. The AI summarisation step uses greedy decoding with beam = 1 to keep results stable.
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