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.
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 →