No. You download your own data from Instagram and open the files here. Nothing signs in to Instagram, so your account is never at risk of being flagged.

Why is someone missing?

Your download only lists accounts at the time it was made, and deactivated accounts are left out. Ask for a new download to see the latest lists.

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Home / Data Exports / Instagram Followers Checker

Instagram Followers Checker

See who does not follow you back, your fans and mutuals from your Instagram data download, with no login and nothing uploaded.

Free, no uploads, no sign-up. Runs 100% in your browser.

How Instagram Followers Checker works

Your export is read inside this tab. Nothing is uploaded, no account or login is needed, and closing the tab clears it. followers_1.json (and _2, _3) and following.json are read in both the older and the 2025 layouts, or the HTML versions. Usernames are compared without case. Nothing signs in to Instagram, so there is no risk to your account.

Input: ZIP, JSON, HTML. Output: CSV.

How to use Instagram Followers Checker

Request Followers and following in Accounts Center, Download your information.
Drop the ZIP, or both JSON or HTML files.
Switch between Not back, Fans and Mutual, and filter.
Open profiles or download each list as CSV.

Tips

Exports hold your private messages, places and habits. Here they are read inside the tab and never uploaded.
Most services take from a few minutes to a few days to prepare an export, so ask early.
Keep the original ZIP. These tools never change it.

Instagram Followers Checker FAQ

Do I need to log in?: No. You download your own data from Instagram and open the files here. Nothing signs in to Instagram, so your account is never at risk of being flagged.
Why is someone missing?: Your download only lists accounts at the time it was made, and deactivated accounts are left out. Ask for a new download to see the latest lists.
Are my files uploaded?: No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
Is it free? Are there limits or watermarks?: Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
Does it work offline?: Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

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