JSON Formatter

When this tool is a good fit

JSON Formatter helps when you need formatted JSON with syntax feedback and copy-ready indentation from raw JSON text from an API, log, clipboard, or generated output. It is most useful for beautifying minified JSON, validating API responses, inspecting logs, and preparing examples for docs or tickets. The notes below focus on the settings that matter, the checks worth doing before you export, and the limits that tend to cause mistakes.

• Takes raw JSON text from an API, log, clipboard, or generated output.
• Lets you adjust indentation size, whether to sort or preserve order, and whether the input should be treated as strict JSON.
• Calls out what to review: syntax errors, trailing commas, comments, unquoted keys, and unexpectedly large nested data.
• Produces formatted JSON with syntax feedback and copy-ready indentation.
• Fits common jobs such as beautifying minified JSON, validating API responses, inspecting logs, and preparing examples for docs or tickets.

Example jobs

• Pretty-print a minified API response.
• Catch syntax errors before schema validation.
• Copy formatted JSON into a code review or ticket.

How to use JSON Formatter

1. Prepare raw JSON text from an API, log, clipboard, or generated output.
2. Set indentation size, whether to sort or preserve order, and whether the input should be treated as strict JSON before running the tool.
3. Generate or process the result, then review syntax errors, trailing commas, comments, unquoted keys, and unexpectedly large nested data.
4. Copy, export, or download formatted JSON with syntax feedback and copy-ready indentation.
5. Run a second pass if the destination system, document, or workflow has stricter requirements.

What to know before you use it

• The input is parsed as JSON and stringified with indentation.
• Syntax errors are shown inline.
• The tool does not execute JSON content.
• Strict JSON does not allow comments, trailing commas, or single-quoted strings.
• Formatting changes whitespace but should not change data values when the input is valid JSON.

Checks and edge cases

• Format before comparing or validating so structural problems are easier to see.
• Avoid pasting secrets from live API responses; use reduced examples when possible.

How your data is handled

This tool works in your browser. Toolumina does not upload or keep the content you enter here.

FAQ