Frequently Asked Questions

Nowhere. All parsing, formatting, validation, and conversion happens entirely in your browser using JavaScript. Your JSON is never uploaded, logged, or transmitted to any server — we have no backend for tool data. You can verify this yourself by opening your browser's Network tab (F12) while using any tool.

The only place your JSON is stored is your own browser's IndexedDB (for the auto-save feature that survives refreshes). It is not sent to us, not synced to any cloud, and not shared with any third party. Clear your browser data to remove it.

We use privacy-respecting anonymous analytics (page views and tool clicks — no personal data, no third-party cookies, no fingerprinting) to know which tools people rely on. There are no ads, no data sold, no tracking pixels. If you use an ad blocker, everything still works.

For small JSON, the Share button encodes your data directly into the URL (base64 in the hash). The link is self-contained — the data never touches our server. That said, treat the link itself as sensitive: anyone with the URL can see the JSON, so don't paste it into public channels if the content is private.

Yes. Because the tools run in your browser, no outbound requests are made with your JSON, so corporate firewalls and DLP tools have nothing to inspect. Once the page has loaded, everything works offline too.

Paste your JSON into the left panel on the home page and it's formatted instantly in the right panel. Use the Formatted / Minified / Tree / Table tabs to switch views. Keyboard: ⌘F formats, ⌘M minifies, ⌘T is Tree view.

Formatted shows pretty-printed JSON text (great for reading and copying). Tree shows an expandable/collapsible node view (great for exploring deep structures). Table renders arrays of objects as a spreadsheet-like grid with resizable columns (great for scanning API data).

Yes — the JSONPath tester at /jsonpath runs expressions like $..author or $.store.books[?(@.price < 30)] against your JSON in real time. Perfect for extracting data from large API responses.

The Repair tool at /repair auto-fixes common problems: missing quotes, trailing commas, comments, single quotes, unescaped characters. It's powered by jsonrepair and runs entirely in your browser.

Yes — dedicated converters live at /csv, /yaml, and /xml. Each one has a settings panel for indentation, delimiters, and array handling. You can also convert JSON straight to TypeScript interfaces at /typescript.

Yes — /diff shows a side-by-side line-level diff with word-level change highlighting. Ideal for spotting what changed between two API responses or config files.

Paste your JSON at /schema and it produces a Draft-07 schema automatically. Toggle to Validate mode to check any JSON against a custom schema with line-level error messages.

There's no hard limit, but the practical ceiling is your device's memory. We regularly handle 20 MB+ JSON files. Above ~2 MB the Tree view auto-switches to Formatted mode to stay responsive, and the Table view uses virtualized rendering so 10,000-row arrays stay smooth.

Yes — click the upload icon in the input toolbar, or drag and drop a .json file into the input area. The file is read in your browser only; nothing is uploaded to a server.

Yes. Once you've loaded the page, every tool works without an internet connection. Your last input is auto-saved to your browser's IndexedDB so it survives refreshes and offline reloads. A full PWA/service-worker install is on the roadmap so it can be pinned as a desktop app.

Real-time parsing of multi-megabyte JSON on every keystroke can block the main thread on slower devices. We debounce input and lazy-load heavy libraries to mitigate this, and a Web Worker–based parser is on the roadmap for truly huge files.

No. There is no signup, login, paywall, or usage cap. Every tool is free forever. History and settings are stored locally in your browser, tied to your device — not an account.

No catch. There is no paid tier, no premium features hidden behind a wall, and no ads. The site is maintained by two developers as a public tool. If it saves you time you can optionally support us at /about via UPI or PayPal — donations are appreciated but never required.

Yes. The site is free for personal, educational, and commercial use. No license fee, no attribution required, no user cap. Just paste and go.

Three main things. (1) Privacy — competitors typically send your JSON to their servers to process; we never do. (2) Breadth — we bundle 23+ tools (parser, diff, JWT, schema, JSONPath, YAML/XML/CSV converters, base64, timestamp, regex, and more) into one keyboard-driven workspace. (3) It's genuinely free — no upsell, no ads, no signup. See the full comparison at /about.

Not currently — every tool is designed to run in the browser and is intentionally simple to use interactively. If you need programmatic JSON tooling, the underlying libraries we use (jsonrepair, ajv, jsonpath-plus, js-yaml, fast-xml-parser) are all open source and can be installed via npm.

Try a hard refresh (⌘⇧R on Mac, Ctrl+Shift+R on Windows) to clear cached assets. If a specific tool is stuck, clear IndexedDB via your browser's dev tools (Application → Storage → Clear site data) — this only removes your local auto-saved input, nothing on our side.

The Table view needs an array of objects (like [{a:1}, {a:2}]). If your JSON is a single object or a mix of types, the table can't render it as a grid — switch to Tree or Formatted view instead.

For small JSON, share links use URL-hash encoding, which some platforms (older versions of Slack, some email clients) truncate. If the payload is large, copy the JSON directly or wait for the upcoming server-backed short-link feature (opt-in, with expiration).

Any modern browser released in the last three years: Chrome, Edge, Firefox, Safari, Brave, Arc, Opera. Internet Explorer is not supported. Mobile Safari and Chrome for Android both work well.

Head to /contact for a form that reaches us directly, or use the Feedback button in the bottom-right corner of any page. Every message is read.