Data Format Converter Tools
Free online data format converters: JSON to CSV, JSON to YAML, JSON to Excel, XML to JSON, HAR to cURL, OpenAPI to Postman, and more. By Graph Tools.
- JSON → CSV Smart Flattener — Convert complex nested JSON into CSV with automatic flattening of objects and arrays using dot notation
- JSON ⇄ YAML Converter — Convert JSON to YAML and YAML to JSON instantly with syntax validation and clean formatting
- JSON → Excel Converter — Convert JSON arrays or objects into downloadable Excel XLSX files with smart column mapping, nested flattening, and tabular preview
- JSON → XML Converter — Convert JSON objects and arrays into clean, well-formed XML with configurable root element names and formatting
- CSV → JSON Schema Generator — Generate JSON Schema from CSV files by inferring column types, required fields, and format constraints automatically
- JSON → OpenAPI Schema Generator — Generate OpenAPI-ready schemas from JSON samples with inferred types, required fields, format detection, and nested structure support
- XML → JSON Converter (Namespace-Aware) — Convert XML to JSON with full namespace preservation, attribute handling, array collapsing, and formatted output preview
- cURL Parser & Request Builder — Parse cURL commands into structured method, URL, headers, and body data for request reuse and code generation
- HAR → cURL Converter — Generate cURL commands from HAR traffic entries with optional secret redaction for safe sharing
- HAR → OpenAPI Draft Generator — Draft OpenAPI path definitions and operations from real HAR traffic captures for downstream review and completion
- OpenAPI → Postman Collection Converter — Convert any OpenAPI 3
- Postman → OpenAPI Converter — Convert a Postman collection JSON into a draft OpenAPI specification for further refinement and documentation
- CSV Cleaner — Normalize CSV rows, fix delimiters and quoting issues, and surface malformed or empty rows with a clean statistics summary
- CSV Diff Tool — Compare two CSV files by a key column and show added, removed, and changed rows with export-ready diff output