Beautify or minify JSON with instant validation and browser-only privacy.
{
"status": "success",
"data": {
"user": {
"id": 48291,
"username": "dev_wizard",
"roles": [
"admin",
"contributor"
]
}
}
}Last updated: 2024-10-01
The JSON Formatter turns raw or minified JSON into a clean, readable format. Paste JSON, choose an indentation style, and get a structured output that is easy to scan and share.
It also validates syntax as it formats. If the JSON is invalid, you can catch the error immediately instead of debugging downstream failures.
All formatting happens locally in the browser. There is no upload and no account, which keeps sensitive payloads private.
Minified JSON is compact but difficult to read. Formatting adds whitespace and indentation so you can understand the structure at a glance.
Validation saves time. A single missing bracket can break an API call or config file, and the formatter surfaces that quickly.
Because it is browser-only, you can use it for production data without worrying about leaks or compliance concerns.
Format a response body so you can inspect nested objects and arrays quickly.
Validate and correct syntax before shipping a configuration file.
Create readable JSON examples for documentation or bug reports.
After editing, produce compact JSON for storage or network efficiency.
Apply consistent indentation so diffs and reviews are easier to read.
Paste JSON into the input panel or load a file locally.
Choose an indentation style that matches your team or project.
The formatter validates the JSON and outputs a clean version.
Copy the result or pass it to the JSON Viewer for easier navigation.
Before formatting, confirm the payload is a single JSON object or array. Some tools output multiple JSON objects separated by newlines, which will fail validation unless combined into an array.
Choose indentation that matches your team or repo. Consistent formatting reduces diff noise and makes reviews easier. Switching between two and four spaces often leads to unnecessary changes that hide the real edits.
When sharing examples, remove sensitive fields after formatting. Pretty output is easier to scan, but it can also expose more detail if you are not careful about redaction.
Trailing commas are a common reason for invalid JSON. If formatting fails, check for a comma after the last item in an object or array.
Large numeric IDs may lose precision when copied between tools. If a value is an identifier, keep it as a string to avoid accidental changes.
Formatting does not fix semantic errors. The output may be valid JSON but still incorrect for your API or schema.
Use formatting as part of a validation workflow. After a payload is formatted, scan for unexpected keys or values that should not be present. This is especially useful for API responses where extra fields can indicate a version mismatch or a feature flag that is enabled unexpectedly.
If you are sharing JSON between teams, agree on a standard indentation and ordering. Consistency reduces friction and makes diffs easier to review. The formatter helps you enforce that standard before files are committed, emailed, or pasted into tickets.
When working with sensitive data, format the JSON first and then redact. Pretty formatting makes it easier to spot personally identifiable information so you can remove it confidently before sharing or storing the file.
If you are diffing JSON versions, format both outputs with the same indentation. This reduces noise and makes structural changes more obvious when you compare two files side-by-side.
When you paste JSON from a UI or console, watch for hidden characters like non-breaking spaces. If formatting fails unexpectedly, retype the brackets or paste into a plain text editor first.
Use formatted JSON as the basis for tests and fixtures. A stable, readable fixture helps you write assertions that are easy to maintain and makes regressions clearer when payloads change. When a response grows, you can update the fixture with minimal diff noise, keeping reviews focused on behavior instead of formatting.
If you are working with JSON Lines, format one entry at a time or convert the file to a single array before formatting.
Use consistent indentation across a project so diffs remain small and reviews stay clear.
If you are sharing JSON in tickets or docs, include a short note about the schema version and source. A formatted payload without context can be misleading when fields change between versions.
No. All formatting and validation happens in your browser.
Yes. After formatting, you can switch to a compact output style if you need a smaller payload.
The formatter reports a syntax error so you can fix it before using the output.
Yes. The formatter keeps the original order of keys and values.
Large files are supported, but the size limit depends on your browser and available memory.
Use whatever your team or project expects. Two or four spaces are common defaults.
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