malformed_json

A JSON file is malformed.

ERRORGTFSstructuredraftMobilityData canonical GTFS Schedule validator

Related

• Source: MobilityData canonical GTFS Schedule validator

Citations

[1] malformed_json rule reference

Rule metadata

Code	malformed_json
Standard	GTFS
Source	MobilityData canonical GTFS Schedule validator
Severity	ERROR
Category	structure
Maturity	draft
Tags	mobilitydata, gtfs, structure
Retrieved	2026-06-12
Reference	https://gtfs-validator.mobilitydata.org/rules.html#malformed_json-rule