JSON Crack

Web · Extension

Freedom report

One barScore 5.2

JSON Crack is ranked #13 of 29 in JSON tools on Freedom251. It runs on Browser extension, Web. There is a free plan.

JSON Crack plans and pricing

Free Free free-forever open-source online tool · approximately 300 KB, depending on data complexity and hardware jsoncrack.com · 4 Oct 2026

Product: JSON Crack is an online viewer that visualizes JSON, YAML, CSV, and XML data as graphs or trees.
Input: Users can upload a JSON file, provide a URL, or enter data in the editor.
Conversion: The tool converts between formats, including JSON to CSV, YAML to JSON, and XML to JSON.
Formatting and validation: It formats JSON and validates JSON, YAML, and CSV.
Code generation: It can generate TypeScript interfaces, Go structs, Rust serde, and JSON Schema.
Schema tools: Its schema tools validate JSON Schema, create mock data, and generate schemas from JSON, YAML, XML, and CSV.
Advanced tools: It includes JWT decoding, data randomization, jq execution, and JSONPath commands.
Export: Users can export graph images as PNG, JPEG, or SVG.
Data handling: The maker says editor data is processed in the browser and is not stored on its servers.
Privacy: The privacy policy says the service may collect usage data and use cookies, and may use Google Analytics.
Data size: The maker says it supports approximately 300 KB, with the limit varying by data complexity and hardware.
VS Code: A VS Code extension lets users visualize JSON directly in the editor.
Integration: Developers can embed JSON Crack using an iframe widget, a postMessage API, or the jsoncrack-react package.
Premium features: The maker says premium features moved to ToDiagram.com, where prior subscribers can use the same credentials.
Price from: Free

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.