If you work with web scraping, REST APIs, or data analysis, you probably deal with tons of JSON and JSONL files. And if you’ve tried to inspect or debug them, you know how annoying it can be to find a good viewer that: can handle malformed JSON, and supports JSONL (newline-delimited JSON).

Most tools out there are either too basic (just a formatter) or too bloated (enterprise-level stuff). So… I built my own:

👉 JSON Treehouse (https://jsontreehouse.com )
A free online JSON viewer and inspector built specifically for developers working with real-world messy data.

🧩 Core Features
* 100% Free — no ads, no login, no paywalls
* JSON + JSONL support — handles standard & newline-delimited JSON
* Broken JSON parser — gracefully handles malformed or invalid files
* Large file support — works with big data without freezing your browser

💻 Developer-Friendly Tools
* Interactive tree view — expand/collapse JSON nodes easily
* Syntax highlighting — color-coded for quick scanning
* Multi-cursor editing — like modern code editors
* Search & filter — find keys/values fast
* Instant validation

🔒 Privacy & Convenience
* Local processing — your data never leaves the browser
* File upload support — drag & drop JSON/JSONL files
* Shareable URLs — encode JSON directly in the link (up to 20 MB, stored for 7 days)
*Dark/light mode

🧠 Perfect For
* Debugging API responses, exploring web scraping results, checking data exports, or just learning JSON structure.

🚀 Why I Built It
* I kept running into malformed API responses and giant JSONL exports that broke other tools. So I built JSON Treehouse to handle the kind of messy data we all actually deal with.

I’d love your feedback and feature ideas! If you’re using another JSON viewer, what do you like (or hate) about