How it works
Paste JSON and the formatter parses it locally, then pretty-prints or minifies with clear error messages if the syntax is invalid.
Beautify, minify, and validate JSON with syntax highlighting in the browser.
Raw JSON
Interactive JSON tree
Valid JSON will appear as an interactive tree…
Paste JSON and the formatter parses it locally, then pretty-prints or minifies with clear error messages if the syntax is invalid.
Conversions run in your tab with JavaScript — no desktop app required.
Files stay on your device during processing. We do not receive your uploads.
Heavy codecs and AI models run locally via Web Workers and WASM (FFmpeg.wasm, Transformers.js).
Paste JSON and the formatter parses it locally, then pretty-prints or minifies with clear error messages if the syntax is invalid.
Extremely large JSON files may freeze the tab. The tool validates syntax only — it does not resolve schema or remote references. Binary or non-UTF-8 content is not supported.
Yes. This tool is free convert online with no signup. Processing stays in your browser — no uploads.
You control quality settings. Choose higher quality for no quality loss when converting online.
Every conversion runs inside your browser tab using JavaScript and Web Workers. There is no background server queue and no account is required for core tools.
Your files are never uploaded to FreeConvertKit for processing. Originals, previews, and exports stay on your device unless you choose to download or share them yourself.
When codecs or AI models are needed, WebAssembly modules such as FFmpeg.wasm and Transformers.js execute locally — giving you desktop-class power with absolute file privacy.
Convert HEX, RGB, and HSL with a live preview.
Generate SHA-256 and other hashes from text in the browser.
Inspect JSON Web Token headers and payloads locally.
Encode text or files to Base64 without uploading anywhere.