Sample JSON files for testing parsers and APIs — free, CC0

JSON is the common language of APIs, and most JSON parsers are fine until they meet a number, a string or a depth they did not expect. These files cover the everyday case and the awkward ones.

json/people-10.json and json/people-1000.json are arrays of people objects from the shared synthetic dataset, pretty-printed with two-space indentation; the same records appear in the CSV, Parquet and SQLite people files.

json/all-types.json exercises every scalar shape worth testing: null, booleans, negative zero, exponents, integers beyond 2^53 and 2^63, Unicode escapes, a surrogate pair and empty containers. JavaScript's JSON.parse silently loses precision on the large integers, which is what the file is for. json/nested-100-levels.json nests an object 100 levels deep, for parsers with a recursion limit.

For size limits, json/1mb.json and json/10mb.json hold people objects fitted to within 5% of their nominal size. Related formats: NDJSON, YAML, TOML and XML.

curl -O https://loremfile.dev/json/10mb.json

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curl -O https://loremfile.dev/json/1mb.json

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curl -O https://loremfile.dev/json/all-types.json

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curl -O https://loremfile.dev/json/nested-100-levels.json

<a href="https://loremfile.dev/json/nested-100-levels.json">download</a>

curl -O https://loremfile.dev/json/people-10.json

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curl -O https://loremfile.dev/json/people-1000.json

<a href="https://loremfile.dev/json/people-1000.json">download</a>