json5/json5

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

7160 stars · 276 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

JSON5 is a JavaScript library implementing the JSON5 data format, a superset of JSON that adds ES5.1 features like comments, unquoted keys, trailing commas, and relaxed string/number syntax. It is the reference implementation for parsing and serializing JSON5, intended primarily for human-written config files rather than machine-to-machine communication.

Use cases

• parse json5 config files in node
• write human-friendly json with comments
• serialize javascript objects to json5
• support json5 in a build tool or bundler
• read config files with trailing commas and single quotes

When to choose

• you need to parse or write JSON5 files in JavaScript
• you want a JSON format for hand-maintained config files
• you need a battle-tested, widely-adopted JSON5 implementation

When to avoid

• you need maximum parsing performance for machine-to-machine data exchange
• you need strict standard JSON output
• you are not working in JavaScript or a platform with a separate JSON5 library

Facets

library · maturity stable

parser serialization json developer-tools files web-development cross-platform json5 config-files data-format es5 nodejs javascript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="json5/json5")