Instagram Caption CTA Generator
By Kushagra Kumar, founder of Shre. Updated 1 July 2026.
Write a caption that makes people comment your keyword, so you can auto-DM them the link.
The best-performing Instagram captions ask for one clear action. This free tool writes comment-to-DM CTAs around your offer and keyword, ready to paste.
A comment-to-DM caption CTA tells people to comment a keyword to get your link in their DMs. Enter your offer and keyword above to generate ready-to-paste captions. Then set the same keyword in Shre auto DM so every comment is answered automatically.
Why comment-to-DM CTAs work
Asking people to comment a keyword does two things: it boosts the post, because comments are strong engagement, and it collects a list of people who raised their hand for your offer. Then you DM all of them at once.
Turn the CTA into automation
A great caption is only half the job. When 300 people comment your keyword, you cannot DM each one by hand. Set the keyword in Shre auto DM and everyone who comments gets your link in seconds, on Instagram's official API.
Tips for higher comment rates
- Use one short keyword that is easy to spell
- Say exactly what they get and when
- Put the CTA in the first line and repeat it at the end
- Pin a comment with the same instruction
Frequently asked questions
What is a comment-to-DM CTA?
It is a caption that asks people to comment a keyword so they get your link or offer sent to their DMs automatically.
How do I get people to comment a keyword?
Ask for one clear action, say exactly what they get, and keep the keyword short. The generator above writes these for you.
How do I send the DM automatically?
Set the same keyword in Shre auto DM. Everyone who comments it gets your DM automatically on the official API.
Is this free?
The caption generator is free. Automating the DMs with Shre is free to start with a 7-day trial.
Related
Source and reference: Instagram Platform, Meta for Developers. Shre sends messages through the official Instagram Graph API within Instagram's rules.