Frequently Asked Questions

Is my data safe and private?

Yes, absolutely. Jsonic processes all JSON data entirely in your browser. Your data never leaves your device and is never sent to any server. We don't collect, store, or have access to any JSON you paste or upload.

The tool works completely offline once loaded. You can verify this by disconnecting from the internet after the page loads - it will continue to work normally.

Can I work with large JSON files?

Yes! Jsonic can handle large JSON files. For very large files, the tool intelligently displays a manageable portion to ensure smooth performance and easy debugging.

You'll see a notification indicating the original file size if truncation occurred. This approach lets you quickly validate and debug large JSON without your browser slowing down.

Does Jsonic work offline?

Yes! Once the page is loaded, Jsonic works completely offline. All JSON parsing, validation, formatting, and repair operations happen locally in your browser.

Your sessions are also stored locally in your browser's storage, so you can access your previous work even without an internet connection.

How does the auto-repair feature work?

When Jsonic detects invalid JSON, it analyzes the structure and attempts to automatically fix common syntax errors. The repair feature handles a wide variety of issues:

Commas Missing commas between items, trailing commas, or extra commas

Quotes Single quotes instead of double quotes, unquoted keys or string values

Brackets Missing or mismatched closing brackets, braces, or parentheses

Comments JavaScript-style comments (// or /* */) which aren't valid in JSON

Whitespace Improper line breaks, tabs, or spaces in string values

Special chars Unescaped special characters in strings

While the repair feature works well for most common issues, severely malformed JSON may require manual correction.

Can I save my work?

Yes! Jsonic automatically saves your work in sessions. Each session is stored in your browser's local storage and persists across page reloads and browser restarts.

You can also download your formatted JSON as a file using the download button in the Output panel.

Can I work on multiple JSON files at once?

Yes! Jsonic supports multiple editing sessions, allowing you to work on several JSON files simultaneously. This is perfect for:

Debugging multiple API responses
Comparing different configurations
Working with related JSON data

Use the sidebar to create new sessions, switch between them, and rename them for easy organization. Each session maintains its own state independently.

What browsers are supported?

Jsonic works on all modern browsers including:

Chrome (recommended)
Firefox
Safari
Edge

For the best experience, we recommend using the latest version of Chrome or Firefox. Some older browsers may have limited functionality.

Why does the tree view collapse large arrays automatically?

For performance reasons, Jsonic automatically collapses deeply nested objects (more than 2 levels deep) and large arrays (more than 20 items). This prevents the browser from slowing down when displaying very large JSON structures.

You can expand any collapsed section by clicking the + button next to it.

Can I use Jsonic for sensitive or confidential data?

Yes. Since all processing happens locally in your browser and no data is ever transmitted to any server, Jsonic is safe to use with sensitive data.

However, please be aware that your sessions are stored in browser local storage, which could potentially be accessed by other scripts on the same domain. If you're working with highly sensitive data, we recommend clearing your session after use or using your browser's private/incognito mode.

Is Jsonic free to use?

Yes, Jsonic is completely free to use with no limitations. There are no ads, no premium features, and no registration required.