Your All‑In‑One Online Tool Hub
Paste, upload, or fetch JSON from any URL — then format, validate, minify, and explore it instantly. Switch between syntax-highlighted code, interactive tree view, and YAML output. All processing happens in your browser. Your data never leaves your device.
Results may vary. Always verify critical data.
.json file from your device, or click URL Fetch to pull JSON directly from any public API endpoint. Not sure what JSON looks like? Click Example to load a sample..json file to your device.A JSON formatter takes compressed or minified JSON — the kind returned by APIs — and adds indentation and line breaks to make it human-readable. Developers use it to inspect API responses, debug configuration files, and understand nested data structures at a glance.
Formatting adds whitespace and indentation to make JSON readable — it does not change the data. Validating checks whether the JSON is syntactically correct: all brackets matched, all keys double-quoted, no trailing commas, no comments. Our tool does both simultaneously — if your JSON is invalid, the error message tells you the exact line and position of the problem.
URL Fetch lets you enter any public API endpoint and load the JSON response directly into the formatter — no copying and pasting required. It is useful for inspecting live APIs such as GitHub, public weather services, or your own backend. The request is proxied through our secure server to handle CORS browser restrictions. We do not log or store any fetched data.
Yes. All formatting, validation, tree rendering, and YAML conversion happen entirely in your browser — your JSON never leaves your device. The only exception is the URL Fetch feature, where a request is routed through our API server to bypass browser CORS restrictions. Even then, we do not log, store, or transmit the fetched content.
Tree View renders your JSON as an expandable, collapsible hierarchy — similar to a file explorer or browser DevTools JSON inspector. Click any node with an arrow (▶) to expand it and see its children. Click again to collapse. This makes it easy to navigate deeply nested structures without scrolling through hundreds of lines of code.
Yes. After formatting your JSON, click the YAML tab in the output panel. The tool converts the full JSON structure to valid YAML using the js-yaml library — the same library used by industry tools like ESLint and Webpack. YAML is widely used for configuration files in Docker, Kubernetes, Ansible, and GitHub Actions.
Disclaimer: QuickITTools.com and EnterPlanet LLC strive to make our tools as accurate as possible. The JSON Formatter processes data locally in your browser. URL Fetch requests are proxied but no data is stored or logged. Results may vary — always verify critical data.