Core transformations run locally in your browser.
Format and validate JSON instantly in your browser. Your input stays on your device and is never uploaded.
Paste JSON on the left and format it locally in your browser.
Your JSON stays on this device.
JSON is often compressed into a single line for transmission. Formatting adds consistent indentation and line breaks so objects, arrays, keys, and values are easier to inspect. It changes whitespace only—the underlying data remains the same.
empinet.dev parses and formats JSON with your browser's native JSON implementation. No input is sent to a server, making the formatter suitable for logs, API responses, and configuration data that should remain local.
No. Valid input is parsed and serialized with two-space indentation. Only insignificant whitespace changes.
JSON requires double-quoted keys and strings, valid commas, and balanced brackets. The error message reports the parsing problem so you can correct it.