durable-json-lint

A Json Lint library (v0.0.3, last updated in 2012) that parses and partially corrects dirty JSON without crashing. It can fix common errors like single quotes, hex numbers, and function calls, and returns corrected JSON alongside error details. Unlike most JSON linters, it continues parsing after errors and substitutes invalid constructs with null. Written in CoffeeScript, runs on Node >=0.4.0 and browsers. Low release cadence and minimal maintenance since 2013.