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Format, validate, and explore JSON as a tree or mind map, with AI-powered transforms — right in your browser's side panel. JSON Copilot is a fast JSON formatter, validator, and viewer that lives in your browser's side panel — so you can clean up and read JSON right next to the tab you're working in, without switching to another site. Paste any JSON — an API response, a webhook payload, a config file, or messy output from an LLM — and format, validate, explore, or fix it in seconds. WHAT YOU CAN DO • Format & beautify JSON with proper indentation (2 or 4 spaces) • Minify JSON for production in one click • Validate JSON as you type — errors point to the exact line • Validate against a JSON Schema • Explore deeply nested data as a collapsible, colour-coded tree • Turn any JSON into an interactive mind map to see its whole shape at a glance • Handle large files smoothly — built on the Monaco editor that powers VS Code AI COPILOT When plain formatting isn't enough, the built-in AI copilot can: • Explain an unfamiliar payload, field by field • Fix broken JSON — quote keys, drop trailing commas, close brackets • Flatten nested objects into flat dot-notation keys, ready for a spreadsheet • Generate a JSON Schema from a sample • Write a schema with AI-written descriptions for every property • Generate realistic test data PRIVACY Formatting, minifying, validation, the tree view, and the mind map all run locally in your browser — your JSON never leaves your device. Only data you choose to send to the AI copilot reaches our servers. Detected sensitive values (passwords, API keys, tokens, emails, card numbers) are now masked on your device before any AI request and restored locally in the result. New Settings → Privacy & Data toggles let you turn masking or stored AI history off. Price estimates now send only size metrics, never your JSON. Improved sensitive-data detection for nested keys and invalid JSON. PRICING The core tools are free, with no sign-up to format or validate. Create a free account for the AI copilot, the mind-map view, and saved projects — you start with 1,000 AI credits, no credit card. GREAT FOR • Developers debugging API responses • Inspecting webhook payloads from Stripe, Shopify, GitHub and more • Cleaning up JSON from ChatGPT and other LLMs • Reading and validating config files • Anyone who works with JSON every day Open JSON Copilot from the toolbar, dock it beside any tab, and keep your JSON tools one click away.