JSON vs XML: Which Should You Use?
Compare JSON vs XML for APIs, readability, schema support, and ecosystem tooling.
JSON and XML are both structured data formats. JSON dominates many modern web APIs, while XML remains common in enterprise and document-driven systems.
Quick verdict
Use JSON for modern APIs. Use XML when legacy standards or document-oriented structures require it.
At a glance
| Criteria | JSON | XML |
|---|---|---|
| Readability | Compact and easy to scan | Verbose but expressive |
| Typical API usage | Common in modern APIs | Common in enterprise and legacy flows |
| Payload size | Usually smaller | Usually larger |
| Best fit | Web services | Document-oriented workflows |
Readability and size
- JSON is usually smaller and easier to scan quickly.
- XML can be more verbose but highly expressive.
Schema and validation
- Both support schema-based validation (JSON Schema and XSD).
- Tooling choice depends on your ecosystem and standards.
Best use cases
- Use JSON for most modern web services.
- Use XML where document structure or legacy integrations require it.
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Frequently asked questions
Is JSON replacing XML everywhere?
Not everywhere. JSON dominates many APIs, but XML remains important in some domains.
Which is faster to parse?
JSON is often faster, but practical performance depends on parser implementations and payload shape.