Postmately

Caption generator

Updated 09.11.2026

Type what the post is about and pick the network. Get a caption with a hook, a call to action and hashtags.

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Caption length by network

NetworkLimitHashtags
Instagram2,2005–7
TikTok2,2005–7
LinkedIn3,000up to 3
Threads5001–2
Pinterest500keywords in text
Bluesky3001–2

Also free: hook generator, carousel splitter, engagement rate calculator.

FAQ

What makes a good caption? +

A first line that works as a hook, two to four short lines of value, and a question or a soft call to action. The hashtags describe the topic, not the brand.

How many hashtags should I use? +

Five to seven relevant ones on TikTok and Instagram, up to three on LinkedIn, none in Telegram. The generator follows these limits.

Does it respect character limits? +

Yes: 300 characters for Bluesky, 500 for Threads and Pinterest, 2,200 for TikTok and Instagram.

Is it free? +

Yes, without sign-up, up to 20 generations an hour.