CheckUnfollowers
A secure, client-side web application that analyzes Instagram data exports to detect unfollowers—no backend, no login, and no data storage. Designed for users who value transparency and control.
CLIENT
Internal R&D Tool
SERVICE PROVIDED
Full-stack development
TIMELINE
1 week
Zero-Backend Architecture
The entire app runs in the browser using JavaScript and Web APIs. All parsing of Instagram’s exported data is handled client-side, avoiding the need for a backend server and eliminating any security concerns tied to user data transmission.
Efficient Data Parsing
We optimized the parsing logic to handle large ZIP exports and deeply nested JSON structures. The result: near-instant rendering of unfollower and mutual-follow lists, even for accounts with tens of thousands of records.
Security and Trust by Design
With no cookies, logins, or trackers, the app uses a minimal, auditable codebase and a transparent flow for tech-savvy users. It demonstrates a privacy-first approach that complies with GDPR and user expectations for sensitive personal data tools.
"From a dev perspective, this app is a masterclass in keeping things local and secure. Great example of privacy by architecture."
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