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JSON at a glance
JSON
RFC 8259 describes JSON as derived from ECMAScript object literals and notes its design goals as minimal, portable, textual, and a subset of JavaScript.
KML at a glance
KML
KML is strongly associated with the Google Earth ecosystem and was later standardized through OGC.
Format comparison
| Feature | JSON | KML |
|---|---|---|
| File type | Other | Other |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | depends | depends |
| Compatibility | moderate | moderate |
| Editability | moderate | moderate |
| Created year | 2001 | 2004 |
| Inventor | Douglas Crockford | Keyhole, Inc. |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | moderate | moderate |
| Workflow fit | exchange | exchange |
| Vector scaling | Not supported | Supported |
| Reflowable text | Not supported | Not supported |
| Structured data | Supported | Supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use JSON
- system exchange
- automation
- specialized interoperability
- Easy to parse across nearly every modern programming environment.
When to use KML
- system exchange
- automation
- specialized interoperability
- Good for visual geospatial overlays and placemarks.
FAQs
Why convert JSON to KML?
Choose KML as target when the output needs to open cleanly in Google Earth or another Earth-browser workflow, especially for annotated map layers, site plans, territory overlays, and location datasets that benefit from styling and folder-based organization.
What changes when converting JSON to KML?
Convert to KML when the output needs to open cleanly in Google Earth or another Earth-browser workflow, especially for annotated map layers, site plans, territory overlays, and location datasets that benefit from styling and folder-based organization.
What should I review after converting JSON to KML?
After conversion, review these destination checks: Open converted output in Google Earth and verify behavior on real samples; Compare output against the expected depends quality profile; Less convenient than JSON-based formats for developer-first API workflows.
How can I keep quality stable in JSON to KML conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Presentation-heavy constructs do not always map neatly into other GIS formats; Less convenient than JSON-based formats for developer-first API workflows; Validate destination compatibility before large-batch conversion.