Debug JSON APIs with a Formatter

2026-07-07 · 3 min read

I was debugging a 500 error on a POST endpoint — the response body was a single line of minified JSON with no indentation. Finding the one wrong field in that wall of text took 15 minutes of squinting. Now I paste every API response into Formly's JSON beautifier first. Clean indentation, instant error spotting.

My API Debugging Workflow

Copy response → paste into Formly → beautify → scan the indented output. The nested structure visually shows you exactly which object has the wrong field. Beautify your JSON →

Sam Taylor Written by Sam Taylor — Full-Stack Developer. I build tools that solve real problems. More about me →