What does the XML, YAML, CSV, and JSON Converter do?
Use this tool when you need a browser utility that converts common structured and tabular formats through a local JavaScript data model. It accepts JSON, XML, YAML, CSV, or TSV text and returns JSON, XML, YAML, CSV, or TSV where the selected data models are compatible. Results are deterministic for the same input except where cryptographic randomness, current time, or a live provider response is part of the task.
Treat cross-format output as a mapping
Direct conversion works best for simple mappings and tabular records. For namespaces, comments, mixed XML content, anchors, or typed CSV values, use an explicit schema-aware pipeline.
How do you use it?
- Select the source and destination formats.
- Paste data or open a local source file.
- Convert, review the normalized representation, and download it with the matching extension.
Worked example
Convert JSON records to CSV
Input
[{"id":1,"name":"Ada"},{"id":2,"name":"Lin"}]Output
id,name
1,Ada
2,LinObject keys become the CSV header and each object becomes one record.
Common errors and fixes
| Symptom | Likely cause | Fix |
|---|---|---|
| CSV output rejects the source. | The parsed value is nested or is not a record array suitable for rows. | Flatten the data or convert to JSON/YAML/XML instead. |
| A round trip changes types or shape. | The selected formats have different data models and type systems. | Review the intermediate JSON representation and define a project-specific mapping when fidelity is required. |
Important behavior of Data Converter
XML, YAML, JSON, and CSV represent attributes, comments, types, nesting, and repeated values differently, so not every conversion round-trips exactly.
Standards and implementation references
- RFC 8259 — JSON (opens in a new tab)Defines the JSON interchange format.
- RFC 4180 — CSV (opens in a new tab)Describes the conventional CSV record format.
- YAML 1.2.2 specification (opens in a new tab)Defines YAML syntax and data representation.
Frequently asked questions about Data Converter
Does the Data Converter upload my input?
No. Processing runs in the current browser tab, and the page does not send tool input to a KitLumi processing endpoint.
What input does the Data Converter accept?
It accepts JSON, XML, YAML, CSV, or TSV text. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the Data Converter produce?
It produces JSON, XML, YAML, CSV, or TSV where the selected data models are compatible. Copy and download controls appear when the output format supports them.
What limitation should I know?
XML, YAML, JSON, and CSV represent attributes, comments, types, nesting, and repeated values differently, so not every conversion round-trips exactly.
What changed?
Added Five input formats, Five output formats, Syntax validation, Local conversion, responsive controls, explicit runtime disclosure, and task-specific examples and limitations.