JSONClean

Clean, transparent, privacy-first JSON formatter. 100% local processing.

JSONClean is a privacy-first JSON viewer built for developers who care about transparency. When your browser opens a .json file or an API response, JSONClean automatically renders it as a clean, collapsible tree. No more squinting at a single line of minified JSON. Every Pro tool runs locally in your browser. No JSON ever leaves your device. ━━ Why JSONClean ━━ Built from scratch on Manifest V3 with the minimum possible permissions. Zero telemetry. Zero remote code. Operated by a single independent developer — no investors, no acquisition risk. ━━ Free for everyone ━━ ✓ Auto-formats JSON responses and .json files ✓ Collapsible tree view with item counts at every level ✓ Expand all / Collapse all shortcuts ✓ One-click copy (raw or pretty-printed) ✓ Light / Dark / Auto theme ✓ Handles large arrays with paginated rendering ✓ Works offline — 100% local processing ✓ Zero telemetry, zero analytics, zero remote code ━━ Pro tools ($2/month — all 100% local) ━━ 🔍 Search Filter by keys, values, or regex. Jump between matches with Prev / Next. Current match is highlighted in orange so you always know where you are. ⛓ JSONPath Run queries like $.users[*].name or $..price. Results highlight in the tree. 📐 Schema inference Generate TypeScript types or JSON Schema from any payload. Pure local algorithm — no LLM, no cloud call. ⇄ Diff Paste a second JSON and see added / removed / changed paths at a glance. 🛡 PII redaction Mask emails, phone numbers, IPs, JWTs, Bearer tokens, API keys (Stripe / GitHub PAT / generic), UUIDs, credit-card numbers — plus custom keys you define. Output is safe to share in support tickets, bug reports, screenshots. ↔ YAML / CSV conversion Switch JSON to YAML or CSV in one click. Two-way YAML conversion supported. 🕘 History & favorites Auto-keep the last 50 JSON pages you opened. Star the ones you revisit. Stored only in chrome.storage.local — never synced, never uploaded. 🔒 All Pro tools run 100% locally. Pro doesn't change the privacy story — your data never leaves your browser. ━━ Privacy ━━ JSONClean does not collect, transmit, or store any of your data on remote servers. All JSON parsing happens locally in your browser. The only permission requested is "storage" to save your settings and history on your device. ━━ Permissions ━━ • storage — to save your settings and (Pro) history locally • Content script (<all_urls>) — to detect and format JSON pages • host_permissions: extensionpay.com — only for the payment flow No analytics, no telemetry. The extension makes no network requests except when you click "Upgrade to Pro". ━━ Pricing ━━ Free forever for basic formatting and large-file rendering. Pro tools available at $2/month, billed via Stripe through ExtensionPay. ━━ Support ━━ Email: jsonclean.app@gmail.com For privacy policy and terms, see the extension homepage: https://quietship.pages.dev/