Offline JSON Formatter & Validator
The JSON Formatter & Validator tab is built for formatting nested JSON payloads with customizable indentation sizes. It processes values purely inside local Web Workers, ensuring that credentials, API keys, or application configs are never uploaded to any remote server. It features an interactive **Tree View** supporting **Lazy Rendering** which dynamically creates DOM components on demand, resolving performance lags and browser crashes commonly experienced when opening files of 5MB to 10MB in size.
To query structured nested keys instantly, enter filter strings in the query bar. Click keys in the Tree View to fetch their exact JSONPath locator syntax (e.g. $.users[0].name) for use in automated tests, APIs, or scripts.
JSON Compare & Diff Utility
Our **JSON Compare** tool evaluates line differences between two structural files. It pretty-prints both payloads and performs line matches using a background Longest Common Subsequence (LCS) algorithm. Any modified property values display in yellow, insertions in green, and removals in red, providing developers with clear configurations changes.
JSON to/from YAML Bidirectional Converter
Easily switch configuration formats using the **JSON ↔ YAML** tool. It loads the compiled js-yaml.min.js library locally to enable offline mapping. Switch between formats with one-click Swap controls, download outputs, or copy to clipboard with auto-saved persistence.
JSON Schema Validator
Validate data constraints locally via the **JSON Schema Validator**. Powered by the ajv.min.js (Another JSON Schema Validator) bundle, it supports standard Draft-07 rules. Paste a JSON payload alongside its corresponding schema structure to output a descriptive validity analysis pointing out path mismatches or missing fields.
JSON ↔ CSV Spreadsheet Converter
The **JSON ↔ CSV** converter enables importing and exporting tabular layouts. When mapping nested JSON to flat CSV lines, the parser flattens hierarchies into dot-notated columns (e.g., address.city). It displays preview spreadsheets in-browser, supporting CSV mapping back to JSON with auto-type resolution.