Working with JSON should not mean hunting for a missing comma or accidentally breaking structured data. The free JSON Formatter from Mike’s Helpers lets you format, validate, and visually edit JSON directly in your browser.
It also works with complete JSON-LD script blocks, making it especially useful for WordPress users who need to update structured data such as dates, names, URLs, ratings, descriptions, authors, publishers, products, and other schema information.
Paste your JSON, load it into the visual editor, make your changes, and copy clean JSON or WordPress-ready JSON-LD when you are finished.
🗂️ JSON Formatter & Editor
Paste plain JSON or a complete JSON-LD script block. Validate it, format it, edit values safely, add or remove properties, and copy clean JSON-LD back to WordPress.
Visual JSON Editor
Change any value below. You can also add or delete properties and nested sections.
Formatted Preview
Your formatted JSON will appear here.
<script type="application/ld+json"> block. Edit fields such as dateModified, names, URLs, ratings, and descriptions, then use Copy JSON-LD for WordPress.🎥 Watch this short video to see how the JSON Formatter works in real time.
Mike says: “One click is all it takes!”
What Is a JSON Formatter?
A JSON Formatter takes JSON data and organizes it into a clean, readable structure.
JSON is commonly used for structured data, APIs, configuration files, applications, and website schema. Valid JSON can still be difficult to read when everything appears on one line or contains deeply nested information.
Formatting adds indentation and line breaks without changing the underlying data.
This tool goes a step further by providing a visual JSON editor. Instead of making every change inside raw code, you can load valid JSON and edit individual values in separate fields.
How to Use the JSON Formatter
Using the tool is straightforward.
- Paste plain JSON or a complete JSON-LD script block into the input box.
- Click Load & Edit.
- The tool checks whether the JSON is valid.
- Use the Visual JSON Editor to change individual values.
- Add or delete properties when necessary.
- Review the formatted JSON.
- Copy plain JSON or WordPress-ready JSON-LD.
Everything is processed directly in your browser.
Edit JSON Without Manually Rewriting the Code
The visual editor is useful when you understand what information needs to change but do not want to manually edit raw JSON.
For example, structured data on an article might contain:
dateModified: 2026-04-20
If you substantially update the article later, you may need to change that value.
Load the JSON into the editor, find dateModified, change the date, and the tool rebuilds the formatted JSON for you.
You can use the same process for names, URLs, descriptions, ratings, titles, and other values.
Edit JSON-LD for WordPress
The JSON Formatter can accept an entire JSON-LD script block, including the script tags.
For example:
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Article",
"headline": "Example Article",
"dateModified": "2026-09-03"
}
</script>
You do not have to manually remove the script wrapper before using the tool.
The JSON Formatter recognizes the JSON-LD wrapper, extracts the JSON for editing, and lets you work with the individual values.
When finished, use Copy JSON-LD for WordPress to get the complete script block back.
Change JSON-LD Dates Safely
Dates are one of the most common reasons a WordPress user might need to update existing JSON-LD.
Structured data can contain properties such as:
- datePublished
- dateModified
If an article was originally published on one date and substantially revised later, those two values may be different.
Instead of searching through raw structured data and worrying about punctuation, load it into the visual editor and change the appropriate value.
Edit Nested JSON Values
JSON often contains objects inside other objects.
A review might contain an author, publisher, product, image, or rating object. Each of those can contain additional properties.
For example:
"author": {
"@type": "Person",
"name": "M L Lamp"
}
The visual editor displays nested information in separate sections so you can see where a value belongs.
This makes larger JSON objects easier to understand and edit.
Edit Schema Names, URLs, Ratings, and Descriptions
The editor is not limited to dates.
Depending on the JSON you paste into the tool, you can edit values such as:
- Names and headlines
- Page URLs
- Image URLs
- Author names
- Publisher information
- Product names
- Descriptions
- Rating values
- Dates
- Other JSON properties
The available fields come from the JSON you provide.
Add and Delete JSON Properties
Sometimes editing an existing value is not enough.
The visual editor also lets you add properties or delete ones you no longer need.
This is useful when modifying an existing JSON object without rebuilding the entire thing from scratch.
After making changes, review the formatted output before placing it on a live website.
Validate JSON and Find Syntax Errors
JSON follows strict formatting rules. A missing quotation mark, comma, brace, or bracket can make an entire block invalid.
When you click Load & Edit, the tool attempts to parse the JSON.
If the JSON is valid, it loads into the editor.
If it is invalid, the tool reports a JSON parsing error instead of pretending the code is usable.
This gives you a quick way to check whether a JSON block is structurally valid.
Pretty Print JSON
Pretty printing adds indentation and line breaks to make JSON easier to read.
You can choose:
- 2-space indentation
- 4-space indentation
- 8-space indentation
Changing indentation affects readability, not the underlying JSON data.
Copy Clean JSON
Use Copy JSON when you need the JSON object without HTML script tags.
This can be useful for configuration files, development work, applications, data exchange, or any system expecting plain JSON.
Copy WordPress-Ready JSON-LD
Use Copy JSON-LD for WordPress when you need structured data that includes the proper JSON-LD script wrapper.
The tool creates:
<script type="application/ld+json">
{
...your JSON...
}
</script>
You can then paste the completed block into an appropriate HTML area in WordPress.
This is particularly useful when updating existing custom schema without manually rebuilding the script tags.
Undo and Redo JSON Changes
Mistakes happen while editing.
The JSON Formatter includes Undo and Redo controls so you can move between recent changes without starting the entire editing job again.
JSON Formatter for Structured Data
JSON-LD is commonly used to provide structured information about a page.
Depending on the page and schema being used, structured data can describe things such as articles, people, organizations, products, reviews, images, and other information.
The JSON Formatter does not decide which schema properties your page should contain. Instead, it gives you a safer and easier way to work with JSON-LD you already have.
That distinction is important. Valid JSON syntax does not automatically mean that a particular schema is correct for a particular webpage.
JSON Formatting vs. Schema Validation
These are two different jobs.
JSON validation determines whether the data follows valid JSON syntax.
Schema validation determines whether structured data follows the requirements and recommendations for a particular schema or platform.
This JSON Formatter validates and edits the JSON structure. It does not replace specialized structured-data testing services.
After making important schema changes, you should still test the finished page with the appropriate structured-data testing tool.
Why Use a Visual JSON Editor?
Raw JSON is efficient for computers but is not always pleasant for people.
A visual editor can make a simple job much easier.
If all you need to do is change:
2026-04-20
to:
2026-09-03
you should not have to become a JSON expert just to avoid breaking a comma somewhere else in the code.
The editor exposes the individual values while handling the JSON formatting for you.
Private and Browser-Based
The JSON Formatter runs directly in your browser.
The JSON you paste into the tool does not need to be sent to an AI service or external API for formatting and editing.
There is no account required. Paste your JSON, make the changes you need, copy the result, and continue working.
Who Can Use the JSON Formatter?
The tool can be useful for developers, WordPress users, bloggers, website owners, students, data analysts, and anyone who occasionally encounters JSON.
You do not need to be a programmer to use the visual editor.
If someone gives you a JSON-LD block and tells you, “Change the modified date,” you can load it, find that value, change it, and copy the rebuilt JSON-LD.
Developers can still use the formatter for ordinary JSON when they simply want a quick browser-based way to inspect and clean up structured data.
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Behind the JSON Formatter & Editor
The original Mike’s Helpers JSON Formatter was designed mainly to format raw JSON. That worked, but formatting alone was not particularly useful for someone who only occasionally works with structured data.
The visual editor makes the tool more practical.
It lets you see the individual properties, change values without manually rewriting raw code, and copy a complete JSON-LD block back to WordPress.
Like the other lightweight tools on Mike’s Helpers, the formatting and editing work takes place in your browser without requiring an external processing API.
Frequently Asked Questions
What does the JSON Formatter do?
It validates and formats JSON into a readable structure. It also provides a visual editor for changing values and adding or deleting properties.
Can I edit JSON with this tool?
Yes. Load valid JSON and the Visual JSON Editor displays its values in editable fields.
Can I paste an entire JSON-LD script block?
Yes. You can paste a complete <script type="application/ld+json"> block. The tool recognizes the wrapper and extracts the JSON for editing.
Can I use it to change dateModified?
Yes. If your JSON contains a dateModified property, load the JSON, find the field in the visual editor, and change its value.
Can I edit nested JSON?
Yes. Nested objects are displayed in sections so you can edit values inside objects such as authors, publishers, products, images, and ratings.
Can I add a new JSON property?
Yes. The visual editor provides controls for adding properties to JSON objects.
Can I delete a property?
Yes. Individual properties and nested sections can be removed from the visual editor.
What is the difference between Copy JSON and Copy JSON-LD for WordPress?
Copy JSON copies the JSON data itself. Copy JSON-LD for WordPress wraps the JSON inside the appropriate application/ld+json script tags.
Will the tool tell me if my JSON is broken?
It checks whether the JSON can be parsed correctly. If the syntax is invalid, the tool reports a JSON error instead of loading it into the editor.
Does valid JSON mean my schema is correct?
No. Valid JSON means the JSON syntax is structurally valid. It does not guarantee that the schema type or properties are appropriate for your webpage.
Does the tool send my JSON to an AI service?
No. Formatting and editing take place directly in your browser without an external AI API.
Do I need an account?
No. The JSON Formatter can be used without creating an account.
Need Help?
Found a problem or have an idea for another useful browser tool? Visit the Mike’s Helpers support page.
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