What you get
A self-contained HTML report you can sort, filter and share, plus a CSV for spreadsheets and a JSON file. Everything is built in your browser from what X already shows you when you scroll.
- Accounts that unfollowed you since the last run, and new followers, in separate tables.
- Accounts that changed their handle, matched by their permanent id so they are not counted as lost and new.
- A trend chart built from every snapshot taken in this browser.
- A partial list is never saved as a baseline, so a rate-limited run cannot invent hundreds of "unfollowers".
How to run it
Five steps, on a computer. The guided setup on the home page adapts them to your system and username.
Open your followers list on X
On a computer, log in to X and open x.com/yourname/followers. If the page was already open, reload it right before pasting: the tool reads the list as X loads it.
Open the browser console
Press Cmd+Option+I on a Mac or F12 on Windows and Linux, then click the Console tab.
Copy the script
Use the copy button on this page. The script is plain text you can read; it lives at x-utils.com/dist/followers-diff.js.
Paste it in the console and press Enter
The first time, the browser asks you to type "allow pasting" first. Type it, press Enter, paste again.
Wait, then open your report
1 to 3 minutes per run for a few hundred followers; longer lists pause and resume automatically. The first run only saves a snapshot, the comparison starts with the second. The report and a CSV land in your Downloads folder.
Why this is safe
The script runs inside the X tab where you are already logged in. It never asks for, reads or stores your password, cookies or keys.
There is no server behind this. The report and the spreadsheet are written straight into your Downloads folder.
No tool follows, unfollows, blocks, likes, posts or deletes anything. It scrolls and takes notes, like a very fast assistant looking at your screen.
The code is open, short, in plain JavaScript and published on GitHub. If you know a developer, ask them to look.
Questions
Where are the snapshots stored?
In your browser's local storage for x.com, on this computer only. Clearing site data for x.com deletes them.
Why did the first run show no changes?
There was nothing to compare with yet. The first run saves your followers; the differences appear from the second run on.
Can it tell me who unfollowed me before I started?
No. X does not expose that history, so the tool can only compare snapshots it took itself.
More answers in the help section.