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Dev tools · May 2, 2026

Better JSON Formatter

Smart JSON formatter: auto-fix, URL decode & copy nodes

What it does

JSON Formatter is a browser-based tool built for developers who work with JSON daily. It auto-fixes malformed JSON instead of just erroring out. The search lets you filter through large payloads instantly - highlighting matching keys and values as you type. You can copy any nested object directly from the tree without manually selecting text. It also accepts URL-encoded JSON as input, and supports URL params so you can pre-load it with JSON from your own workflow or scripts.

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