Working with a JSON file, from first check to final export
The toolkit is a starting point when you have JSON but have not yet decided whether you need to fix, reshape, or inspect it. The same in-tab document can move between the core views while you investigate an API response or configuration file.
When should you use it?
- Check a response before sending it to a teammate.
- Explore a nested property and copy its exact value or path.
- Prepare a readable or compact copy for a bug report.
Example: choose a view for an API response
Format for reading, switch to the tree to copy $["team"][0]["name"], or validate the same document before sharing.
{"team":[{"name":"Alex"}]}{
"team": [
{
"name": "Alex"
}
]
}Start with the question you need to answer
An API response can be valid JSON and still be difficult to use. A single long line hides its structure; a nested object hides the field you need; an array of records is often easier to scan as a table. Choose a view after deciding whether you are checking syntax, reading structure, or preparing a copy for someone else.
Keep the received text as your starting point. Formatting it before investigating an error can move the line and column you were given by another system. Validate the original first, then create the view that helps with the next step.
Choose an export that fits the recipient
Use indented JSON for a code review and compact JSON for a field that expects one document on one line. A tree is useful for exploration, while a table helps compare records. Neither preview changes the underlying meaning of the document. Copy or download the result before closing the tab, because the workspace does not keep a saved document history.
From an API response to an answer.
Choose the view that fits your task. Your document follows you between tools in this tab, so you can check syntax, explore a branch, and return to editing.
Bring your data
Paste a response or open a UTF-8 JSON file from your device.
Choose your workflow
Format for readability, validate for errors, or inspect a tree.
Take the result
Copy a value, copy the full output, or download a JSON file.
How do I check a JSON API response before sharing it?
Capture the response body as text, paste it into the workspace, and validate it before changing its layout. Format it for a readable bug report, use the tree for a nested value, and export the exact view the recipient needs. Keeping the original text matters when a number is too large for JavaScript number precision.
JavaScript: capture the response text
javascriptconst response = await fetch('/api/team');
const jsonText = await response.text();
// Paste jsonText into the toolkit before editing or sharing.Reading text preserves the received JSON spelling. The site does not fetch your API endpoint; paste the text yourself or open a local file.
Which view should I open first?
Start with Validator if an application rejects the response. Use Formatter for a readable copy, Tree for one nested field, and Table for a record array. The views answer different questions about the same document.
What should you check before using the result?
The document lives in this browser tab, so export it before a reload. Large inputs and previews have the core workspace limits shown above; a preview limit does not truncate the source.
Choose the right tool
Use the validator when parsing fails, the formatter for a readable copy, the editor to change the source, and the viewer to explore nested values. Beautifier controls focus on reading; minifier removes whitespace for a compact export.
A workspace, not a storage service
The active document stays in tab memory during internal navigation. Copy or download it before reloading. Theme, indentation, and wrapping preferences can be remembered locally; JSON documents are never automatically saved.
Technical reference: JSON syntax and interoperability · RFC 8259