Are the recent posts really doing worse?

The feeling that Instagram has turned against you is extremely common and occasionally correct. This compares the engagement on the most recent posts with the account's own median: a public sign of how the posts are doing, not a measure of reach.

Needs a public account: a private account's posts cannot be read by anyone. Paste the @handle or the profile URL.
This is not a shadowban checker, and those do not work. Instagram has no public flag saying an account is suppressed, so no site can read one. What can be read is whether the recent posts are performing below this account's own median. That is a measurement; a verdict of "shadowbanned" is not, because nothing public supports it.

What the number means

The tool takes the engagement on the three most recent posts and compares it with the median of everything it can see. Around 100% means business as usual. Well under means the recent posts genuinely underperformed for this account. Well over means something recently worked.

Note what is being measured: engagement, not reach. Reach is private and only the owner sees it in the app. They move together most of the time, and when they do not, the app's own insights are the place to look.

The boring explanations, in the order they are usually true

Where to look next

A drop is usually explained by something the full audit shows: a change of format, a change of cadence, or followers arriving faster than interest. If the timing changed too, the hours that worked for this account is the other half of the answer. And if the follower count grew suddenly, check whether the audience still behaves like a real one.

Questions

Can you tell me if I am shadowbanned?

No, and be suspicious of anything that says it can. There is no public signal to read. What is here is the account's own history, measured on engagement.

My last post did badly. Is that enough to worry?

No. Single posts vary enormously. The tool uses the three most recent for that reason, and even three is a small number.

Does deleting and reposting help?

Generally no, and it throws away the engagement the post had already collected.

The other tools