buger/jsonparser

Health v2 · maintenance only

Adoption not part of the score

5648 stars · 457 forks observed · 2026-08-28

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

A fast, zero-allocation JSON parser for Go that lets you extract fields by path without defining structs or schemas. It is significantly faster than the standard encoding/json package and has been formally verified with 100% MC/DC coverage.

Use cases

• parse json without defining structs in go
• extract fields from unpredictable third-party api responses
• fast json parsing for high-throughput log processing
• parse large json files with minimal memory allocation
• query json values by path in go
• speed up json deserialization compared to encoding/json

When to choose

• you need maximum json parsing performance in Go with zero allocations
• you don't know the json structure ahead of time and want path-based field access
• you're processing gigabytes of json from APIs, logs, or analytics events
• you want a dependency-free parser with formal correctness guarantees

When to avoid

• you need to unmarshal json into typed Go structs with full encoding/json compatibility
• your workloads are small or performance is not a concern
• you need marshaling/serialization of complex object graphs rather than reading values

Facets

library · maturity active

parser serialization json parsers developer-tools performance go cross-platform zero-allocation schemaless-json json-path-access high-performance formally-verified

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