PayloadBench

Browser-local workflow

Compare two JSON payloads online.

Find every added, removed, and changed value across API responses, request payloads, webhooks, and config snapshots. The comparison runs locally in your browser without uploading pasted tool input.

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Launch AccessJSON Diff is currently free with unlimited use. No payment method required.

Load a realistic sample without sending payload content to analytics.

Old (Left)
New (Right)
Diff Result

{ } { }

Paste JSON in both panels and click Compare

Cmd+Enter to compare

API response diff

Compare API responses before and after a deploy when a field changed, a nullable value disappeared, or a customer sees different payloads than expected.

Sensitive because: API responses often include account IDs, plan state, feature flags, or internal error details.

PayloadBench highlights added, removed, and changed values in a browser-local JSON workflow with no pasted-content upload for core tools.

webhook payload diff

Compare webhook payloads from retry attempts, sandbox events, or provider migrations to see which event fields changed.

Sensitive because: Webhook payloads can include customer identifiers, subscription state, invoice amounts, and operational metadata.

Use the sample button or paste two payloads, then verify local processing with DevTools Network.

config snapshot diff

Compare config snapshots across staging and production when flags, rate limits, or nested options drift.

Sensitive because: Config snapshots may expose service names, rollout flags, regions, and internal operational assumptions.

PayloadBench keeps the comparison lightweight: no API governance platform, just a private JSON diff workflow for sensitive payloads.

How to compare two JSON payloads

Put the earlier payload on the left and the newer payload on the right, then select Compare. PayloadBench recursively compares nested objects and arrays so you can review structural and value changes without manually sorting keys or scanning raw text.

  1. 1

    Paste the original payload

    Use the left panel for the baseline API response, request body, webhook, or configuration.

  2. 2

    Paste the updated payload

    Use the right panel for the payload you need to compare against the baseline.

  3. 3

    Run the payload comparison

    Select Compare to calculate added, removed, and changed JSON values.

  4. 4

    Inspect the result

    Review the highlighted diff, then use the viewer or schema validator when you need deeper inspection.

Open the JSON payload viewerValidate a payload against JSON SchemaDecode a JWT payload
Pro workflow

Compare sensitive JSON without making it a platform project

JSON Diff, JWT Decoder, JSONPath Query, and Schema Validator are built for API responses, webhook payloads, configs, and schema errors. No pasted-content upload for core tools.

View pricingTry Schema Validator free

Verify local processing | Read security guide | Launch Access details

About PayloadBench Diff

PayloadBench Diff compares API responses, webhook payloads, and config snapshots side by side with no pasted-content upload for core tools.

How do I compare two JSON payloads online?
Paste the original JSON payload into the left panel and the updated payload into the right panel, then select Compare. PayloadBench highlights added, removed, and changed values recursively across nested objects and arrays.
Can I compare API request and response payloads?
Yes. You can compare request bodies, API responses, webhook events, and configuration snapshots. The tool compares valid JSON structures, so the two payloads do not need to use the same field order.
Is PayloadBench Diff safe for comparing sensitive JSON data?
PayloadBench Diff is designed for sensitive JSON workflows. Both JSON inputs are compared in the browser workflow with no pasted-content upload. You can verify this by opening DevTools Network tab while running a diff comparison and checking that no request contains your JSON.
How to verify that PayloadBench Diff does not upload your JSON?
Open PayloadBench Diff, then open DevTools (F12) and switch to the Network tab. Paste your JSON into both input panels and run the comparison. Check that no network request contains your pasted JSON. That verifies the browser-local JSON diff workflow.
How does JSON Diff work?
PayloadBench Diff compares two JSON objects and highlights added, removed, and changed values in color. Green indicates added values, red indicates removed values, and yellow indicates modified values. The comparison is recursive, so nested objects and arrays can be inspected clearly.
Can PayloadBench Diff handle large JSON files?
PayloadBench Diff is best for API responses, webhook payloads, config snapshots, and moderate JSON objects. Very large or deeply nested JSON can be expensive to compare in any browser tab. For large-file parsing, use the formatter, viewer, beautifier, or parser workflow first.
What makes PayloadBench Diff different from other JSON diff tools?
Many online JSON diff tools process your data on a remote server. PayloadBench Diff uses a browser-local JSON workflow with no pasted-content upload and no pasted-content analytics.