To write an Instagram caption, describe your post in a sentence or two, choose Post, Reel or Carousel and a tone, pick a niche if you like, and press Write captions. You get up to five captions, each with an opening line, a call to action and up to five hashtags under the text.
A caption is the text under an Instagram post: the line that makes people stop, the story and the call to action. This page writes up to five of them for one brief.
What you get
Up to five captions for one post, each with its hashtags
You describe the post and choose its format and tone. The generator writes captions that differ in angle and in their first line: each opens with a line meant to stop the scroll, keeps to short paragraphs and ends with a call to action, such as a question or a nudge to save the post. Pick a niche to point the captions at your audience.
What comes out:
- Up to five captions. A few short paragraphs each, written for a feed post, a Reel or a carousel, in the tone you chose.
- Hashtags under each one. Up to five per caption, the most Instagram allows on a post, specific to your topic.
- One-click copy. Copy a caption with its hashtags and line breaks, ready to paste into Instagram.
The generator is told not to invent prices, discounts or results, and to leave a placeholder such as [price] or [number] where a number would help, for you to fill with a fact you can back up. A caption with a price or a percentage in figures that your brief did not give is dropped.
How to use it
Instagram caption generator: three steps
Describe the post
Write what the post is about in a sentence or two: the product, the news or the moment. A detail such as who it is for makes the captions more specific.
Choose the format and tone
Pick Post, Reel or Carousel, a tone, and a niche if you like. Press Write captions.
Copy the caption you like
Read the captions, keep the one that sounds like you and replace any placeholder with a real fact.
Your first run is free, no sign-up; after that, your email lets you keep going. A new brief, format or tone gives a new set.
The limit of five hashtags on an Instagram post is from the Instagram Help Center, checked on 6 October 2026.
Limits
Free version limits
Your first run is free, no sign-up. Leave your email to keep going, then create a free Spytrend account: it opens Content AI. A free account searches Instagram Reels by topic, with a daily limit, and lets you try a video breakdown; TikTok and YouTube results, full breakdowns and scripts come with a subscription.
One run writes up to five captions for one brief, in English. The same brief returns the same captions, so reword the post or change the format or tone for a different set.
Why creators use it
A caption for every post — without starting from an empty box
A post goes out on schedule whether the caption is ready or not, and the caption is often the last thing written. Starting from several drafts, each from a different angle, is faster than starting from a blank field.
A creator with a Reel ready to go tries the same idea in a playful and an emotional tone, and keeps the caption that sounds like them.
An SMM specialist planning a week of posts for a client writes one brief per post, keeps the caption closest to the account’s voice and edits it from there.
A business owner who runs their own account announces a launch in a direct and an expert tone, and keeps the one that sounds like the brand.
A caption finishes a post you have already shot. The bigger question is what to shoot next, and Spytrend’s Content AI shows what is taking off in your niche.
Go further with Spytrend
Beyond the caption: what to shoot next in your niche
This tool writes captions for one post. What to shoot next in your niche is a bigger question.
Spytrend is an ad intelligence platform for Facebook and TikTok advertising: ads AI-classified into 33 business categories, with every advertiser assembled into a single card — all ads, pages, domains and countries in one place.
For creators, Spytrend has Content AI. Search Reels, TikTok and YouTube videos in your niche: describe what you are looking for in words, and it finds videos by meaning, hook and scenario. Open any video to see its hook, structure and a ready-to-shoot script, and see which sounds are taking off in Reels. A free account searches Instagram Reels by topic, with a daily limit, and lets you try a video breakdown; TikTok and YouTube results, full breakdowns and scripts come with a subscription.
Two jobs where a list of captions is not enough
- Choosing the next Reel. Search your topic and see which Reels in your niche are taking off, before you plan the next post.
- Getting the hook right, not only the caption. People read a caption once the video has stopped them. Open a video that took off to see its hook and structure, and get a ready-to-shoot script for your own account.
What you can see next to a video
- The hook and the scenario. The video broken down by hook, scenario and retention, so you see why it worked.
- A ready-to-shoot script. A script for your own Reel, built from the video’s format and structure.
- The sounds. Which sounds are taking off in Reels, to choose the audio before you write the caption.
From a caption to what is taking off in your niche, in three steps
- Search what you post about. Type the topic the way you described it here, or describe the video you want to make in a few words.
- Open the Reels that took off. Look for videos that beat their creator’s usual views: the idea worked, not just the size of the account.
- Shoot your own version. Note the hook, the format and the pacing, plan your own Reel around them, then write its caption here.
Why the videos, not only the captions
A caption is read after the video has done its work. Scrolling a niche account by account to see what stops people does not scale, so Content AI searches your niche for you and puts the videos that took off side by side.
How to start
Create a free account and search the topic you just wrote about. A free account searches Instagram Reels by topic, with a daily limit, and lets you try a video breakdown; TikTok and YouTube results, full breakdowns and scripts come with a subscription.