Validate, format, and transform JSON — with error highlighting, TypeScript generation, key sorting, and flattening.
Format messy JSON data into a clean and readable structure instantly. This tool automatically organizes your JSON with proper indentation, spacing, and alignment, making complex data easier to read, edit, and debug. You can customize indentation using spaces or tabs to match your coding style and quickly switch between formatted and minified views whenever needed. You can also paste JSON directly, upload a JSON file, or load data from a URL for quick formatting and validation.
Smart Validator validates your data instantly as you type or paste. It scans your code line by line and detects issues like missing quotes, extra commas, mismatched curly braces, or invalid syntax. Instead of spending hours finding errors manually, you’ll get clear validation messages with the exact error type, line number, and column number — making debugging faster and easier.
Explore complex JSON data with an interactive tree view. Expand or collapse nested objects and arrays to focus only on the sections you need. You can copy individual values or entire object groups directly from the viewer. When you hover over any key, the tool displays its complete JSON path, making it easier to identify and reference specific data locations. This visual layout helps you understand large datasets quickly and navigate deeply nested structures without confusion.
Quickly find specific keys or values inside large JSON data. The built-in search feature highlights matching results instantly as you type, making it easy to locate important information without manually scanning through the entire structure. You can move between multiple matches using the previous and next navigation controls. When you click on a search result, the tool displays its complete JSON path and automatically helps you navigate directly to the matched location.
Convert JSON data into clean TypeScript interfaces automatically. This tool analyzes your data structure, including nested objects and arrays, and generates structured TypeScript models with appropriate property types. You can customize interface names and copy the generated code instantly for use in your applications. The output includes properly organized interfaces for nested objects, arrays, and complex data structures, helping you save time and avoid manually creating TypeScript types.
Convert deeply nested JSON data into a simple flat structure instantly. The tool transforms complex objects and arrays into single-level key paths like store.address.city or store.inventory[0].name, making the data easier to read, search, and manage. You can choose separators such as dots, slashes, or underscores based on your preferred format. This feature is useful for configuration files, translations, form handling, and data mapping. You can also unflatten flat key-based JSON, such as 'user.name': 'json', back into its original nested structure automatically with a single click.
Get detailed insights about your JSON data instantly. The tool automatically analyzes your structure and displays useful statistics such as the total number of keys, nesting depth, objects, arrays, strings, numbers, booleans, and null values. It also shows the raw input size, formatted size, and minified size, so you can easily compare how much space your JSON data uses in different formats. These live statistics help you understand and manage large JSON files more efficiently.
Reduce JSON file size instantly by removing unnecessary spaces, line breaks, and formatting. This feature converts formatted JSON into a smaller and compact version, which helps reduce file size and improves data transfer speed. You can easily switch between readable and compressed views anytime without changing the original JSON data.
Organize your JSON data by sorting object keys alphabetically in ascending or descending order. This makes your JSON data clean and easy to read. Sorting keys helps you quickly compare changes and find data without confusion. The tool automatically sorts keys inside all nested objects and arrays of your JSON structure.
Your data stays completely secure and private while using this tool. All processing happens directly in your browser, so nothing is sent to external servers or stored anywhere. This allows you to safely work with sensitive JSON data, API responses, or personal information without worrying about data leaks or tracking. Everything runs locally on your device for full privacy and control.
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}When working with APIs, server responses, or configuration files, even a small syntax error can cause issues or break the output. Paste your JSON into the editor instead of checking it manually. The tool will quickly find problems like missing brackets, extra commas, or invalid structure. It also shows exactly where the error is so you can fix it easily and avoid runtime issues.
Developers often work with large JSON responses from APIs, which can be hard to read and understand. This tool formats and checks those responses instantly, making it easier to find issues, verify data, and ensure everything is correct before using it in your application.
Instead of writing TypeScript types or data models by hand, you can generate them directly from JSON data. The tool also lets you view data in a visual way and copy exact paths, which helps you build React, Next.js, and other applications faster with fewer mistakes.
JSON files often become messy when they are stored or shared between systems. This tool helps you clean, format, and organize them into a clear structure. You can sort keys, flatten nested objects, or change the structure to make the data easier to manage and use in different environments.
Start by entering your JSON data into the editor. You can paste JSON directly, upload or drag and drop a local file, or load data from a public URL. The tool processes everything instantly in your browser without sending your data to external servers.
The tool checks your JSON automatically whenever you type or edit data. If there is a problem like a missing bracket, extra comma, or invalid syntax, it shows the exact line and error details so you can fix it quickly and easily.
Once your JSON is valid, you can format and explore it using different tools. You can view data in the Tree Explorer, search for keys and values, generate TypeScript interfaces, flatten or unflatten structures, sort keys, and check JSON statistics. All changes are updated instantly in the live output preview.
After making your changes, you can copy the formatted output instantly or download it as files like `.json` or `.ts`. You can also switch between formatted and minified views anytime based on your needs. Everything works locally in your browser, so your data stays private and secure.
No. Standard data files (JSON) do not allow comments or extra commas at the end of lists. If your data contains them, our checker marks them as mistakes. The tool will show a warning pointing to the exact line and explain that you need to remove the extra comma or comments.
When you switch to the Tree view, the tool displays a visual layout of your data. Simply hover over any key or value and click it. The tool instantly calculates the exact access path (such as `user.profile.emails[0]`) and copies it to your clipboard. This is a great time-saver for developers writing code to read nested values, as it eliminates typos and ensures accurate data mapping in your JavaScript, TypeScript, React, or Python applications.
No, the data must be valid before formatting can take place.
Yes, you can format files up to 50MB directly in the app.
The sorting tool works through all levels, which means it organizes keys alphabetically at every level of your data. It starts with the main keys and then goes down into every nested object. You can sort keys in ascending order (A to Z) or descending order (Z to A).
Formatting adds indentation, line breaks, and spaces to make JSON files easy for humans to read and understand. You can customize the indent size to match your style. Minifying removes unnecessary spaces and line breaks to reduce file size, which helps the data load faster and use less bandwidth while transferring over the web.
If an array contains different types of values (such as strings, numbers, and objects), the generator recursively inspects each item. It combines the types logically. For example, if an array has both strings and numbers, it generates a type like `(string | number)[]`. If it finds complex nested objects, it builds separate interfaces for them and references them correctly in the parent definition, keeping your code clean and type-safe.
Yes, when you use the 'Load URL' feature, the browser fetches the data directly to your local editor. The tool does not route the request through any third-party servers. Since the network request runs on your machine and the parsing happens entirely in your local browser tab, your data remains secure and private.