JSON to Multi-line (Pretty Print)

About the JSON to Multi-line

Expand single-line JSON into nicely indented, multi-line JSON that's easy to read.

Key features

• Expands single-line JSON into readable multi-line JSON
• 2-space, 4-space or tab indentation
• Validates input with line and column errors
• Ideal for log lines, env vars and API responses
• Copy or download the result
• Runs in your browser

Make one-line JSON readable

Logs, environment variables, network traces and compact API responses deliver JSON on a single line. It's efficient but nearly impossible to read once it's longer than a sentence. JSON to Multi-line expands it with proper indentation so you can see the structure.

{"order":{"id":1001,"items":[{"sku":"A1","qty":2}],"paid":true}}

becomes

{
  "order": {
    "id": 1001,
    "items": [
      {
        "sku": "A1",
        "qty": 2
      }
    ],
    "paid": true
  }
}

Where one-line JSON comes from

• Application logs in JSON format (Serilog, Winston, Pino, Logback JSON encoders).
• Kubernetes and Docker logs viewed with kubectl logs or docker logs.
• Environment variables holding JSON configuration.
• Network tabs and HAR files, where response bodies are often minified.
• Message queues and webhooks.

Quick workflow for logs

1. Copy the log line.
2. Delete everything before the first { and after the last }.
3. Paste it here; if it's full of \", use JSON Unstringify instead.

Related tools

Go back to a single line with JSON to One Line. For interactive exploration, use the JSON Viewer.

How to use the JSON to Multi-line

1. Paste your data into the input box, upload a file, or click Sample to try it out.
2. Adjust the options above the editor if you need to (indentation, delimiter, and so on).
3. The Multi-line appears instantly in the output panel. Any errors are shown with their line and column.
4. Click Copy to copy the result, or Download to save it as a file.