JSON Toolkit

What is this tool?

JSON Toolkit is the main workspace for formatting, validating, visualizing, querying, diffing, flattening, converting, and generating types from JSON values.

When should I use it?

• Use it when you need to work with json, formatter, validator, minifier content.
• Use it when content should stay local to the browser.
• Use it from Universal Workspace when automatic detection recommends this tool.

When should I NOT use it?

• Do not use it for non-JSON formats unless you are intentionally converting them first.
• Do not rely on inferred types as a formal API contract without reviewing edge cases.
• Do not paste data that policy forbids you from handling locally.

How it works

JSON Toolkit receives text through the tool page or a temporary Universal Workspace handoff, processes it with browser-side logic, and presents results without uploading pasted data.

Step-by-step guide

1. 1.Open the tool directly or start from Universal Workspace.
2. 2.Paste or load a sample input.
3. 3.Review validation messages and output previews.
4. 4.Copy, download, or open results in a related DevPaste tool when useful.

Examples

Load a safe sample, copy it, or open it in the tool through the same temporary handoff system used by Universal Workspace.

{
  "project": "DevPaste",
  "tools": ["JSON Toolkit", "JWT Inspector Pro", "Regex Studio"],
  "localOnly": true
}

{
  "project": "DevPaste",
  "tools": ["JSON Toolkit", "JWT Inspector Pro", "Regex Studio"],
  "localOnly": true
}

Privacy

• Everything runs locally in your browser.
• Pasted data is not uploaded for processing.
• Pasted data is not placed in documentation URLs.
• DevPaste does not track pasted tool content.

Tips

• Start in Universal Workspace when you are unsure which tool fits pasted content.
• Use related tools for follow-up transformations instead of copying content into URLs.
• Keep sensitive examples masked before sharing screenshots or exports.

Common mistakes

• Assuming local decoding or formatting proves the content is trustworthy.
• Copying generated output without reviewing environment-specific details.
• Using a related tool when this dedicated workspace gives better validation.
• Forgetting that browser support can affect Clipboard, Web Crypto, or file APIs.

Limitations

• Browser APIs, memory, and configured input limits still apply.
• Documentation examples are safe samples and may not cover every edge case.
• Client-side tools cannot verify external service behavior unless a feature explicitly supports that locally.

Keyboard shortcuts

• Use Ctrl/Cmd + K to open the command palette.
• Use Tab and Shift+Tab to move through documentation controls.
• Tool-specific shortcuts are listed inside individual workspaces where supported.

Advanced usage

• Use JSONPath to isolate a subset before opening it in another tool.
• Use schema validation when syntax is valid but the shape still needs verification.
• Use semantic diffing for objects where key order should not matter.

FAQ

Related tools

Related learning

References

• JSON on MDN
• JSON Schema specification
• JSON on MDN