PBPrivateBrowserToolsFree tools that run in your browser
Processed locallyNo accountPrivacy
JSON Tools
Processed in your browser. No upload.

JSON Formatter + Validator

Validate JSON, spot the parse error, and get clean output in one place.

InputJSON
OutputFormatted, validated, or minified JSON
Works onAny modern browser
Your JSON is processed in your browser. Nothing is uploaded.

About this tool

Validates JSON, points to parse failures, and formats valid or repaired output for reuse.

Common use cases

  • Clean up JSON before pasting it into code, config, or APIs.
  • Validate JSON payloads and spot the error location quickly.

How to use it

  1. Paste JSON or upload a .json file.
  2. Run Format and validate or Minify.
  3. If the JSON is broken, review the error location and the suggested repaired output.
  4. Copy the result or download a fresh JSON file.

Best for

  • Debugging API payloads before sending them to another system
  • Cleaning pasted JSON into a readable structure for reuse
  • Checking syntax and then copying a corrected JSON block back into code or config

Input and output notes

  • Accepted inputs: .json.
  • Exports are generated locally in the current browser session.

Limits to know

  • Large pasted documents can be slower on lower-memory devices.
  • Invalid source data must still be corrected before export.

Privacy

This tool runs in the browser, so pasted content and uploaded files stay on the current device during normal use.

Common next steps

JSON Validator

Stay inside the JSON workflow when you need validation, formatting, or export in the next step.

YAML to JSON

Stay inside the JSON workflow when you need validation, formatting, or export in the next step.

JSON to CSV

Convert JSON into CSV with optional flattening for nested fields.

Choose the right JSON page

Use JSON Formatter + Validator for the main edit flow

Choose the formatter when you want readable output, error reporting, and a cleaned copy in one page.

Use JSON Validator for syntax checks only

Choose the validator when the search intent is about checking whether JSON is valid before you paste it elsewhere.

Use JSON Minifier for compact payloads

Choose the minifier when the output needs to be as small as possible for transport, embedding, or storage.

Common questions

Is my JSON uploaded anywhere?

No. JSON parsing, formatting, and validation happen entirely in your browser.

Can I format large JSON files?

Yes for normal browser-sized files, but very large files may use more memory depending on your device.

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