Forge Json

Remove Null Values from JSON

Remove null fields from webhook payloads, API responses, and form submissions before validation, diffing, CSV export, or storage.

Paste your JSON → Get results instantly (no signup)

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Try examples:

→ remove noisy values and remove nulls and empties.

{
"name": "Alice",
"bio": "",
"age": 30,
"address": null,
"tags": [],
"meta": {}
}
Output✓
1{
2  "name": "Alice",
3  "age": 30
4}

Love the result?

Use this exact pipeline in your app, backend, or LLM workflow.

No setup needed. Works with curl, Node, Python.

Uses example data. For edited input, copy from the playground.

Read integration guide

Works with:

  • Webhook payload cleanup
  • API responses with null fields
  • Form submissions
  • CSV and validation prep

Example: input → output

Remove null values from JSON

Remove null values from JSON when webhook payloads, API responses, or form submissions contain empty fields that should not continue into validation, CSV export, or storage. This page uses the same cleanup engine as Clean JSON, but the intent is narrower: drop null fields while keeping meaningful values easy to inspect.

Input
{
  "event": "order.paid",
  "orderId": "ORD-1001",
  "customer": { "name": "Alice", "phone": null },
  "coupon": null
}

Output
{
  "event": "order.paid",
  "orderId": "ORD-1001",
  "customer": { "name": "Alice" }
}

How to remove null values

Paste your JSON, enable null removal, and run the cleanup. The output keeps objects, arrays, strings, numbers, and booleans, but removes fields where the value is exactly null. Use the result before validation, diffing, CSV export, or pipeline automation.

If empty strings should also disappear, use the broader Clean JSON page. If null has business meaning in your API, keep it instead of deleting it.

When to use this tool

Use this tool for practical cleanup before another workflow:

  • Remove null webhook fields before debugging handlers.
  • Clean API responses before converting them to CSV.
  • Prepare form submissions for validation or storage.
  • Reduce noisy payloads before comparing JSON changes.

Null removal risks

Some systems treat null as an explicit signal. In a PATCH request, phone: null may mean “clear this phone number,” while a missing phone field may mean “leave it unchanged.” Remove null values only when missing and null are equivalent for the next consumer.

Related tools

Read more on the blog

Advanced usage (optional)

Clean Values

v1.0.0
Cleanup
objectarraydestructive

Description

Clean Values

Remove nulls, empty strings, empty collections, default values, and duplicates from JSON data. Optionally trim whitespace and sort keys. A comprehensive cleanup utility for normalizing messy data.

Operations

Each cleanup operation can be toggled independently. Enable multiple operations to clean data in a single pass.

Remove null values

Delete object keys that have null values at any depth.

Remove empty strings

Delete object keys that have empty string "" values.

Remove empty collections

Delete empty objects {} and empty arrays [].

Remove default values

Delete falsy defaults — 0 and false. Useful for stripping placeholder values.

Remove duplicates

Remove duplicate items in arrays. Compares both primitive values and full objects (deep equality).

Trim whitespace

Trim leading and trailing whitespace from all string values throughout the document.

Sort object keys

Sort object keys alphabetically at all levels.

Configuration

FieldTypeDefaultDescription
Apply topath-picker[]Scope operations to specific paths only (empty = apply everywhere)
Remove null valuesbooleantrueRemove object keys with null values
Remove empty stringsbooleantrueRemove object keys with empty string values
Trim whitespacebooleantrueTrim leading/trailing whitespace from strings
Remove empty collectionsbooleanfalseRemove empty objects {} and arrays []
Remove duplicatesbooleanfalseRemove duplicate items in arrays
Remove default valuesbooleanfalseRemove falsy defaults (0, false)
Sort object keysbooleantrueSort object keys alphabetically

Use Cases

API Response Cleanup

  • Strip null fields from API responses before displaying
  • Remove internal metadata fields (__v, _id) with empty values
  • Trim whitespace from user-submitted form data

Data Normalization

  • Deduplicate records imported from multiple sources
  • Sort keys for consistent ordering across objects
  • Remove placeholder defaults before exporting

Configuration

NameTypeDefaultDescription
Apply topath-picker[]Scope operations to specific paths only (empty = apply everywhere)
Remove null valuesbooleantrueRemove object keys that have null values
Remove empty stringsbooleantrueRemove object keys that have empty string values
Trim whitespacebooleantrueTrim leading and trailing whitespace from all string values
Remove empty collectionsbooleanfalseRemove empty objects {} and empty arrays []
Remove duplicatesbooleanfalseRemove duplicate items in arrays (primitives and objects)
Remove default valuesbooleanfalseRemove falsy defaults (0, false)
Sort object keysbooleantrueSort object keys alphabetically

Examples

AI Prompt
Clean up this JSON and remove noisy values and remove nulls and empties.
{
"name": "Alice",
"bio": "",
"age": 30,
"address": null,
"tags": [],
"meta": {}
}
Output✓
1{
2  "name": "Alice",
3  "age": 30
4}
Config
Remove null values
ON
Remove empty strings
ON
Trim whitespace
OFF
Remove empty collections
ON
Remove duplicates
OFF
Remove default values
OFF
Sort object keys
OFF

API Usage

POST /api/v1/utilities/cleanup.clean-json
Example:
curl -X POST https://your-domain.com/api/v1/utilities/cleanup.clean-json \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"inputs":{"primary":{"name":"Alice","bio":"","age":30,"address":null,"tags":[],"meta":{}}},"config":{"removeNulls":true,"removeEmptyStrings":true,"removeEmptyCollections":true,"removeDefaults":false,"removeDuplicates":false,"trimStrings":false,"sortKeys":false}}'
Response
1{
2  "name": "Alice",
3  "age": 30
4}