The largest kit after the image tools, and the one most people start with. Format and validate JSON, repair the almost-JSON that comes out of logs and LLMs, convert to and from CSV, YAML, XML, TOML, SQL and .env, query with jq or JSONPath, diff two documents, and generate TypeScript, Go, Rust, Java or Python types from a sample.
What this kit does that a general converter doesn't.
Repair and type generation. Most JSON sites stop at pretty-printing; this one fixes trailing commas, single quotes and unquoted keys, then hands you a typed struct.
Pick a tool
Grouped the way jsontoolskit.org groups them. Every link opens the tool on its own site.
Format / Validate
Convert
- JSON → CSV
- CSV → JSON
- JSON → TSV
- TSV → JSON
- JSON → YAML
- YAML → JSON
- JSON → XML
- XML → JSON
- JSON → TOML
- TOML → JSON
- JSON → NDJSON
- NDJSON → JSON
- JSON → Base64
- Base64 → JSON
- JSON ↔ MessagePack
- JSON ↔ CBOR
- MongoDB Extended JSON
- JSON → HTML table
- JSON → Markdown table
- HTML table → JSON
- JSON → Excel
- JSON → ES bulk
- JSON → HCL
Config formats
Transform
- JSON Sort Keys
- JSON Flatten
- JSON Unflatten
- JSON Deep Merge
- JSON Extract
- JSON Escape
- JSON Unescape
- Convert JSON Key Case
- Rename JSON Keys
- Remove Nulls from JSON
- Dedupe a JSON Array
- Filter a JSON Array
- JSON Array ↔ Object
- Sort a JSON Array
- Group and Aggregate a JSON Array
- JSON Array Set Operations
- Redact JSON
- Prune a Large JSON Document
Query / Explore
Diff / Patch
JSON Schema
Generate types
Inspect
Reading, not tools
Format explainers and sample files published on jsontoolskit.org.
- All JSON tools
- JSON formatting tools
- JSON converter tools
- JSON config file tools
- JSON transform tools
- JSON query tools
- JSON diff tools
- JSON schema tools
- JSON code generator tools
- JSON inspector tools