JSON Cleaner

FreePrivateRecursive

Strip null values, empty strings, and empty arrays from any JSON in one click. Cleans nested structures recursively.

Input JSON

Cleaned JSON

NullsEmpty stringsEmpty objectsEmpty arrays

Ctrl+Enter Clean

JSON Cleaner – Remove Nulls and Empty Fields

Strip null values, empty strings, empty objects, and empty arrays from any JSON in one click. All cleaning is recursive, so nothing slips through nested structures. Your data never leaves the browser.

Why Clean JSON?

Reduce Payload Size

Removing nulls and empties shrinks payloads (often 20–50%). Inspect the delta before/after with JSON Diff when tuning API contracts.

Improve API Performance

Smaller JSON serializes faster over the wire. Share trimmed samples with partners through JSON → CSV when they live in spreadsheets.

Cleaner Code

APIs without noisy nulls are easier to consume. After cleaning, format consistently with the JSON Formatter and document fields using JSON Schema.

How to Use

Paste your JSON into the left panel
Tick the options for what to remove (nulls, empty strings, objects, arrays)
Click Clean or press Ctrl+Enter
Copy the output or download as .json

Example

Input

{
  "name": "Alice",
  "age": null,
  "notes": "",
  "tags": []
}

Cleaned

{
  "name": "Alice"
}

Features

Remove null values recursively through all nesting levels
Optionally strip empty strings, empty objects, and empty arrays
Output is auto-formatted and pretty-printed
Field count shows exactly how many were removed
Download cleaned JSON as a .json file
100% private; no server, no upload

Frequently Asked Questions

Does the cleaner work on nested objects?

Yes. Cleaning is fully recursive. It traverses every nested object and array and removes matching fields at all depths.

Why should I remove null values from JSON?

Removing nulls reduces payload size, avoids null-check boilerplate in consuming code, and makes API responses cleaner and easier to work with.

Can I choose what to remove?

Yes. You can independently toggle: null values, empty strings, empty objects, and empty arrays. Only the selected types will be removed.