What is JSON Parser Online?

JSON Parser Online is a free browser-based tool to parse, format, validate and explore JSON data as an interactive tree view. Everything runs 100% client-side — your data never leaves your browser.

Is JSON Parser Online free to use?

Yes, completely free. No sign-up, no login, no ads, and no usage limits.

Is my JSON data private?

Absolutely. All processing happens in your browser using JavaScript. Your JSON is never sent to any server. It is safe to use with sensitive data including API keys, tokens, and private records.

What browsers are supported?

JSON Parser Online works on all modern browsers including Chrome, Firefox, Safari, and Edge on Windows, macOS, Linux, Android and iOS.

FAQ – JSON Parser Online | Frequently Asked Questions

General

JSON Parser Online is a free, browser-based tool for developers to parse, format, validate, minify and explore JSON data as an interactive collapsible tree view. No installation required — just open the site and paste your JSON.

Yes. JSON Parser Online is 100% free with no sign-up, no login, no ads and no usage limits. It always will be.

No account or registration of any kind is needed. Open the site, paste your JSON, and start using it immediately.

JSON Parser Online works on all modern browsers — Chrome, Firefox, Safari and Edge — on Windows, macOS, Linux, Android and iOS. It is fully responsive and works on mobile and tablet devices.

Features

Paste your JSON string into the Input pane on the left. The tool validates and formats it automatically as you type. You can also click Format / Beautify to re-indent with 2-space indentation, or Minify to compress it to a single line.

Once your JSON is parsed, the right pane shows it as a colour-coded interactive tree. Click the arrow (▾) next to any object or array node to collapse or expand it. This makes it easy to navigate deeply nested JSON structures.

Use the search box above the tree view. Type any key name or value and all matching text is highlighted instantly. The match count is shown next to the search box.

Ctrl/⌘ + Enter — Parse JSON
Ctrl/⌘ + Shift + F — Format / Beautify
Ctrl/⌘ + Shift + M — Minify
Ctrl/⌘ + K — Focus search box

Six themes are available — Dark (default), Light, Monokai, Nord, Solarized Dark and Dracula. Your theme choice is saved automatically and restored on your next visit.

Eval JSON uses JavaScript's eval() to parse content that is not strict JSON — for example, JavaScript object literals with single quotes, trailing commas, or unquoted keys. Use it only when Parse JSON fails and you trust the source of the data.

Privacy & Security

        Your data never leaves your browser. All parsing, formatting and validation is done 100% client-side using JavaScript. No JSON is ever transmitted to any server.
      

Yes. Because all processing happens locally in your browser, your JSON data — including any API keys, tokens, passwords or private records it may contain — is never sent anywhere. It is as private as a local desktop application.

No personal data, usage data or JSON content is collected. The only data stored locally is your theme preference, which is saved in your browser's localStorage and never transmitted anywhere. See our Privacy Policy for full details.

No cookies are used. Your theme preference is stored in localStorage (local to your browser only) and is never transmitted to any server.

Support & Contact

Email us at support@onlinejsonparser.com with a description of the issue or feature request. We read every email and genuinely appreciate the feedback.

If JSON Parser Online saves you time, consider buying us a coffee ☕. It helps keep the tool free, fast and maintained. Sharing it with fellow developers is also a huge help!