mangiucugna/json_repair

Health v2 · maintenance only

Adoption not part of the score

5119 stars · 225 forks observed · 2026-10-21

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

A Python library that repairs malformed JSON strings, such as broken output from LLMs, APIs, logs, or user input. It works as a drop-in fallback for .loads(), supports schema-guided repair, streaming, and also provides a CLI and online demo.

Use cases

• parse malformed JSON from LLM responses
• fix broken JSON with missing quotes and trailing commas
• repair truncated JSON from logs or APIs
• validate and coerce JSON against a JSON Schema
• drop-in replacement for .loads on unreliable input
• repair JSON in streaming LLM output

When to choose

• you consume JSON from LLMs that often emit invalid syntax
• you need a lightweight Python fallback when .loads fails
• you want schema-guided repair and type coercion
• you need to fix JSON from logs, webhooks, or user input

When to avoid

• your JSON is already well-formed and standard .loads suffices
• you need strict validation that rejects rather than repairs invalid input
• you work outside the Python ecosystem

Facets

library · maturity active

parser serialization cli large-language-models developer-tools parsers apis python cli cross-platform -repair llm-output structured-output pydantic -schema streaming

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