josdejong/jsonrepair

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

2397 stars · 88 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A TypeScript library that repairs invalid JSON documents, fixing issues like missing quotes, commas, brackets, single quotes, comments, trailing commas, JSONP, MongoDB types, and newline-delimited JSON. It offers both a simple function API and a streaming API for handling arbitrarily large documents.

Use cases

• repair broken json from llm output
• fix invalid json copied from javascript code
• convert ndjson to a json array
• strip comments and trailing commas from json
• repair truncated json files
• clean up jsonp or mongodb-flavored json

When to choose

• you receive malformed JSON from LLMs, APIs, or copy-pasted sources and need it parsed
• you need to stream-repair very large JSON documents
• you want a lightweight npm library usable in ESM, CommonJS, or UMD projects

When to avoid

• you need strict JSON validation rather than lenient repair
• you need a parser for formats other than JSON
• your project is not in a JavaScript/TypeScript runtime

Facets

library · maturity active

parser serialization json developer-tools developer-tools parsers files large-language-models cross-platform json-repair llm-output-fixing streaming typescript nodejs javascript

Member repositories

For agents

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