General questions
What is JSON Toolkit?
JSON Toolkit is a collection of browser-based tools for working with JSON. It helps you format, validate, minify, inspect, compare, export, and convert JSON for everyday developer and API workflows.
Is JSON Toolkit free?
Yes. The current tools are free to use and do not require an account. You can open the website, paste JSON, and start working immediately.
Do I need to sign in?
No. JSON Toolkit does not require login for formatting, validation, viewing, conversion, comparison, or export workflows.
Is JSON Toolkit still being improved?
Yes. New tools, clearer guides, better mobile layouts, and more conversion formats may be added over time based on practical use cases and feedback.
Privacy and data handling
Is my JSON uploaded?
No. Core JSON formatting, validation, viewing, comparison, and conversion run locally in your browser. Your pasted JSON does not need to be sent to a backend server for these tool features.
Does JSON Toolkit store my JSON?
The tool may use your browser local storage for convenience features such as recent history or the last input. This data stays on your device unless you clear it or your browser removes it.
Can I paste private production data?
JSON Toolkit is designed for local browser processing, but you should still follow your company policy. Avoid pasting secrets, private keys, passwords, access tokens, or confidential customer data into any online tool unless it is allowed.
Does the site use analytics or ads?
The site may use privacy-conscious traffic analytics and Google AdSense. These services help understand page visits and support the project. The JSON you paste into the tools is separate from those services and is processed in your browser.
Formatter, validator, and minifier
What is JSON formatting?
JSON formatting, also called beautifying, adds indentation and line breaks so JSON is easier to read, review, debug, and share.
What does the JSON validator check?
The validator checks whether your JSON can be parsed correctly. It helps catch missing quotes, trailing commas, broken nesting, and other syntax problems before you use the data somewhere else.
What is JSON minify?
Minify removes unnecessary spaces and line breaks. It is useful when you want a compact JSON string for storage, transfer, logs, or configuration values.
What is JSON stringify?
Stringify converts JSON into an escaped string form that can be pasted into code, configuration, logs, or another JSON value.
What happens if my JSON is invalid?
The input panel shows validation feedback with line and column details when possible. Smart Fix can help with common safe repairs, but you should always review the result.
Should I format or minify JSON?
Use Format when humans need to read the JSON. Use Minify when you need a compact version for transfer, storage, or embedding.
Views and inspection
When should I use Tree view?
Tree view is useful when JSON has nested objects or arrays. It lets you expand and collapse sections so deeply nested API responses are easier to inspect.
When should I use Table view?
Table view is best when the JSON contains an array of similar records. It helps compare fields across rows and can make API response data easier to scan.
Can I search inside JSON?
JSON Toolkit is built around inspection workflows, so you can use the available views and browser tools to find values, review fields, and understand structure before copying or exporting data.
Can I load JSON from a URL?
Yes, when the source allows browser access. Some websites block cross-origin browser requests, so a URL may fail even when it opens normally in a tab.
Conversion and export
Can JSON Toolkit convert JSON to CSV?
Yes. JSON arrays of similar objects can be exported into CSV, TSV, Excel-friendly text, Markdown tables, HTML tables, SQL Insert statements, XML, YAML, or JSON output.
Can it convert CSV back to JSON?
Yes. CSV rows can be converted into JSON objects using the header row as field names. Review the output before importing it into another system.
What is JSON Compare?
JSON Compare helps you review differences between two JSON documents. It is useful for checking API changes, config updates, test snapshots, and before-and-after data.
Can I download the result?
Yes. Depending on the tool and output type, you can copy results or download formatted, converted, or exported data for use elsewhere.
JSON Code Converter
What is JSON to class conversion?
JSON to class conversion reads a sample JSON object or array and generates starter model classes that match detected fields and nested structures.
Which languages are supported?
The converter supports C# classes, Java POJO models, Python classes, and Dart classes. More output formats may be added as JSON Toolkit grows.
Does it support arrays and nested objects?
Yes. The converter can inspect arrays and nested objects from your sample JSON and generate starter structures for them.
Can I use generated code directly?
The generated code is a starting point. Review naming, nullable fields, annotations, serialization settings, validation rules, and framework-specific conventions before production use.
Troubleshooting
Why does a tool page not open?
If a public page does not open, the latest files may not have been deployed yet. Wait for the hosting deployment to finish, then refresh the page.
Why is Google not showing my page yet?
New pages can take time to be crawled and indexed. Submit the sitemap in Google Search Console and use URL Inspection for important pages.
How do I request a feature?
Use the Contact or Feedback link to share confusing behavior, bug reports, or requests for additional developer formats.
How should I check important output?
Always review generated, repaired, compared, or converted output before using it in production, source code, documents, or database imports.