Optimisation
Free Social Media SEO Tool
Turn a description and your target keywords into a caption for Instagram, TikTok, Facebook, LinkedIn, X, Threads or Pinterest.
What changes with each platform
The same description gives a different caption on each platform, because each one is written to its own brief.
- Instagram: line breaks and no more than five hashtags.
- TikTok: a short caption of under 150 characters.
- X: one post within 280 characters by X’s own count, with two hashtags at most.
- Facebook, LinkedIn and Pinterest: three to five hashtags.
- Threads: a conversational post within 500 characters, with one tag at most.
Example input
Platform: Pinterest. Description: “Step-by-step photos of a small balcony herb garden in recycled tins”. Keywords: balcony herb garden, small space gardening. Style: informative. You’ll get a pin description that uses both phrases in ordinary sentences and says what the reader will learn.
Questions about this tool
It means describing a post in the words people type into a platform’s search box, so the post can be matched to those searches. Captions, titles and on-screen text are where those words usually go.
Instagram, TikTok, Facebook, LinkedIn, X, Threads and Pinterest. It doesn’t cover YouTube; use the YouTube title and video description generators for that.
No. You bring the keywords. It has no search-volume or trend data, so choose phrases your customers actually use and check them in the platform’s own search.
Nobody can promise that. The tool works your keywords into a readable caption, which helps a platform understand the post. What shows up in search is decided by the platform.
Yes. The AI tools are free with a fair-use limit per person and per day, so everyone can use them. If you reach it, the tool tells you when to try again.
Another tool for the next step
Free Instagram SEO Tool
Suggest keyword-aware captions for Instagram using your description and chosen keywords. Review the wording before using it.
Free TikTok SEO Tool
Suggest keyword-aware captions for TikTok using your description and chosen keywords. Review the wording before using it.
Free Social Media Post Checker and Character Counter
Check one draft against Instagram, TikTok, Facebook, YouTube, LinkedIn, X and Bluesky: character counts, hashtag and mention limits, media format and a preview showing where each caption is cut short.
Free X (Twitter) Character Counter
Count a post the way X does: links as 23, emoji as 2, against the 280 limit
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Bring your drafts into Wahlu to plan, create and schedule content for your connected accounts.