📋 How to Use
- Paste JSON into the input area.
- Click Format for indentation, or Minify for a single line.
- Copy the result with Copy.
Invalid JSON shows an error. Data stays in your browser.
JSON Formatter – Beautify, Minify, and validate
Paste API responses, config snippets, or logs to format them for reading—or minify for smaller payloads. Parsing runs only in your browser; pasted content is not uploaded to Webooro.
Why is my JSON invalid? The usual suspects
If the formatter reports an error, the position in the message usually points just after the real mistake. Check these first.
| Wrong | Right | Why |
|---|---|---|
{"a": 1, "b": 2,} |
{"a": 1, "b": 2} |
No comma after the last item |
{'a': 'x'} |
{"a": "x"} |
Only double quotes are allowed |
{a: 1} |
{"a": 1} |
Keys must be quoted |
{"a": 1 // memo} |
{"a": 1} |
JSON has no comments |
{"a": 1 "b": 2} |
{"a": 1, "b": 2} |
Items need a comma between them |
{"ok": True} |
{"ok": true} |
true / false / null are lowercase |
Copying from a chat app or a document can also swap straight quotes (") for curly ones (“ ”), which JSON does not accept. If everything looks right but it still fails, retype the quotes.
✨ How to use it well
Format is for humans reading structure; Minify saves bytes over the wire. This page switches between both without extra tools.
If JSON is invalid, you get a helpful error. Avoid pasting secrets into untrusted sites—here, data stays client-side.
Highlights
- Beautify or minify in one place.
- Syntax errors surface when JSON is invalid.
- Your JSON is not sent to our servers.
Great for debugging REST responses, cleaning config files, or unfolding one-line logs.
Good use cases
- Pretty-print a backend log line
- Make config.json readable before editing
- Minify JSON before embedding in a bundle
- Find a missing comma or quote quickly
Compared with other tools
IDEs also format JSON, but this is quick when you only have a browser. Nothing is uploaded to our servers.
For huge files or CI pipelines, prefer CLI or editor plugins.
❓ Frequently Asked Questions
- Q. Is it really free?
- Yes. This JSON formatter is offered at no charge.
- Q. Do I need to sign up?
- No. Use it directly on this page.
- Q. Is my JSON sent to a server?
- No. Processing happens only in your browser; data is not sent to Webooro servers.
- Q. What happens if the JSON has syntax errors?
- Invalid JSON will show an error message. Check for missing quotes, comma placement, and bracket pairs, then try again.
- Q. What's the difference between Format and Minify?
- Format adds indentation and line breaks for readability. Minify removes whitespace to reduce file size. Use Format for debugging, Minify for transmission.
- Q. Can I upload a JSON file directly?
- Currently you paste JSON text directly. To use a .json file, open it in any text editor (Notepad, VS Code), copy the contents, and paste them here.
- Q. Can I include comments in JSON?
- Standard JSON does not support comments. Adding // or /* */ will produce a syntax error. If you need comments, consider JSON5 or JSONC formats — but most APIs and tools expect strict JSON.
- Q. Can I copy or save the result as a file?
- Yes. Use the copy button to put the formatted or minified result on your clipboard. To save as a file, paste the result into Notepad and save with a .json extension.