Flat JSON Array
A flat JSON array of ten simple objects — the baseline case for JSON parsing and mapping.
JSON fixtures, including invalid ones
Flat, deeply nested, JSON Lines, and intentionally invalid JSON for testing parsers and error handling.
Deeply Nested JSON
A deeply nested JSON document with objects inside arrays inside objects — for testing recursive parsing and path access.
JSON Lines (JSONL)
A JSON Lines file with one object per line — for testing streaming/newline-delimited JSON parsers.
Intentionally Invalid JSON
An intentionally invalid JSON file with a trailing comma and a missing closing brace — for testing parser error handling and messages. Not valid JSON by design.
GeoJSON Sample
A GeoJSON FeatureCollection with a point, a line, and a polygon — for testing map tools and geo importers.
NDJSON Stream
A newline-delimited JSON (NDJSON) stream of event records — for testing streaming JSON parsers.
JSON Schema (User)
A draft-07 JSON Schema describing a user object — for testing schema validators and schema-aware tooling.
Jupyter Notebook (IPYNB)
A valid Jupyter notebook (nbformat 4.5) with markdown cells, code cells, and real outputs (stdout stream and an execute result) — for testing notebook parsers, nbconvert, and JSON tooling.
Sample JWT — Decoded (JSON)
The decoded header and payload of the sample JWT as JSON, alongside the public signing secret and algorithm — the ground truth for checking a JWT decoder's output.