JSON is easy to misread
JSON is common, but a small typo or missing comma can break an API payload or a config file. Validation helps you spot structure problems before the data is used elsewhere.
Why local JSON validation is useful
Keep payloads in the browser while you check structure, formatting, and errors without sending data elsewhere.
When the data is sensitive or not meant to leave the browser, local validation is a practical first step. It helps you inspect the structure and fix obvious issues immediately.