Do I need to log in to Instagram to check unfollowers?

No. Mewbula never connects to your Instagram account. You only upload the 'Your information' file that you download from Instagram yourself, so you never have to enter your username or password.

Do I have to install an unfollower-checking app?

No installation is needed. It runs right in your web browser, and your file is never sent to a server, it is analyzed entirely within your browser.

A mutual friend is incorrectly shown as an unfollower.

Because Instagram generates the 'Download your information' file from stored, past data rather than in real time, the file can differ slightly from your actual account status. This is a structural limitation that can happen even when your settings are correct.

How to Check Instagram Unfollowers

An unfollower is an account that you follow but that does not follow you back. Because Instagram doesn't show you "who unfollowed me" directly inside the app, many people go looking for unfollower-checking apps and run into problems like login requirements, ads, and account risk. The safest approach is to use the data file that Instagram officially provides. No app to install, and no login required.

The 3 Steps in Brief

Download your information — Export your followers and following data from Instagram as JSON. (See the full data-download guide)
Upload the file — Upload the ZIP file you received directly to the Instagram unfollower checker.
Check the results — It is analyzed right in your browser and shows your unfollowers, mutuals, and blocked lists. You can also download the lists as a text file.

Why This Method Instead of an App?

No login — It never connects to your account, so there is no way your password can leak.
Processed in your browser — The file you upload is never sent to a server; it is analyzed only on your own device.
No account risk — Unlike unfollower apps that send automated requests, this uses an official feature, so it has nothing to do with suspensions, restrictions, or shadowbans.
No ads, no install — You use it right on the web.

Why Results Can Differ From Reality

There is one thing we want to be honest about. Instagram's "Download your information" file is generated from stored, past data rather than in real time. As a result, a mutual friend may be shown as an unfollower and the file can differ slightly from your actual status. This isn't a mistake in your settings, it is a structural limitation of Instagram's data itself. Most unfollower-checking services hide this fact, but Mewbula tells you up front.

Next Steps

If you don't have the file yet, first follow the data-download guide to prepare it. If you already have the file, you can check right away with the tool. If you only want to see the accounts that "I follow but that don't follow me back," take a look at Find people who don't follow you back as well.