Free Instagram tools
Small tools for the jobs every Instagram account runs into: picking giveaway winners, checking engagement, and finding a username and bio. Free, and most don't need an account.
- Connect your account
Instagram comment picker
Pick random giveaway winners from the comments on your post, with rules for keywords, tags and repeat entries.
Open the tool - No login
Engagement rate calculator
Work out the engagement rate of a post or an account, by followers or by reach, from the numbers in Instagram.
Open the tool - No login
Instagram username generator
Get username ideas from your name and what you post about, all following Instagram's username rules.
Open the tool - No login
Instagram bio generator
Get bio ideas with a call to action that fit the 150-character limit, for a business, creator or personal account.
Open the tool
Instagram sizes and limits
The numbers you need while you use the tools, checked against Instagram's own help pages.
- Instagram post size: every dimension (2026)
- Instagram story size: dimensions and safe zones
- Instagram reel size: dimensions, ratio and cover
- How long can Instagram reels be? (2026)
- Instagram DM character limit (and other DM limits)
- Instagram hashtag limit, caption and bio length
- Instagram profile picture size and highlight covers
Let MuChat do the rest
The tools help with one job at a time. MuChat answers comments and DMs for you, every day.
Auto-reply to comments
Answer every comment with your keyword and send the link by DM, around the clock.
Run giveaways in the DMs
Enter people when they comment, check they follow you, and keep a list of everyone who took part.
Turn story replies into leads
Ask people to reply to your story and send them the link, the guide or the discount straight away.
Turn followers into conversations
MuChat replies to every comment and DM with your keyword automatically. Free plan, no card needed.