Jsonly

What This Tool Does

• Validates JSON syntax and highlights invalid input.
• Beautifies JSON into readable indentation or minifies it for compact transfer.
• Lets you search and replace text with key-only or value-only scope.
• Filters output by key or value to isolate relevant parts of a large object.
• Converts UTC and Unix epoch timestamps into a selected timezone.
• Supports local history so you can keep useful payload snapshots.

How To Use It

1. Paste JSON into the input editor or load a local JSON file.
2. Click Validate JSON to confirm syntax before making transformations.
3. Use Beautify JSON for readability, or Minify JSON for compact output.
4. Use Filter to narrow output to specific keys or values.
5. Use Find/Replace to navigate and update large payloads quickly.
6. Convert timestamps when you need local-time interpretation.
7. Copy or download the final output.

Underlying Concepts

JSON is a structured data format composed of objects, arrays, strings, numbers, booleans, and null. Parsing means reading text into a structured value. Formatting changes whitespace only; it does not change data. Minification removes non-essential whitespace for smaller payload size. Filtering and scoped search are view and edit aids that help you work efficiently on nested structures.

Practical Examples

{"status":"ok","data":{"user":{"id":42,"name":"Ari"}},"meta":{"requestId":"abc-123"}}

{"event":"payment_captured","timestamp":1779699452}

{"customer_id":123,"customer_name":"Rin"}

Common Mistakes To Avoid

• Using single quotes instead of double quotes for JSON strings.
• Leaving trailing commas in objects or arrays.
• Assuming beautify changes values. It only changes layout.
• Running replace across all text when you intended key-only changes.
• Confusing string timestamps with numeric epoch values.
• Editing huge payloads without validating after each major change.

Frequently Asked Questions