Skip to main content
QA Training
Career EngineSkillsToolsInterview BankPromptsGuidesCommunity
Sign inSign up
All Tools

API Response Inspector

Detect regressions in complex payloads.

Instantly compare JSON or XML responses across different environments. Pinpoint schema changes, missing fields, or data mismatches that standard manual checks might overlook during integration testing.

What it does

Instantly compare JSON or XML responses across different environments. Pinpoint schema changes, missing fields, or data mismatches that standard manual checks might overlook during integration testing.

Who this is for

QA engineers and SDETs who test REST or GraphQL APIs and need to quickly identify differences between two JSON or XML responses — for example, comparing staging vs production or before vs after a deployment.

Sign in to use this tool

Create a free account or sign in before running interactive QA tools and career-support workflows.

Sign in to continueCreate free account

How to use API Response Inspector

  1. 1Paste your baseline API response (JSON or XML) into the left panel.
  2. 2Paste your comparison response into the right panel.
  3. 3Click Inspect — the tool diffs the two payloads field by field.
  4. 4Review the highlighted differences: missing fields, type changes, and value mismatches.
  5. 5Use the summary to write a targeted defect report or regression test.

Example output

Given two JSON responses from a /users endpoint, the tool highlights that the `role` field changed from `string` to `array`, the `updated_at` timestamp format changed from Unix epoch to ISO 8601, and the `permissions` array is missing from the comparison response.

Limitations

  • Designed for structured API responses — not suitable for binary, multipart, or HTML responses.
  • Very large payloads (over 500 KB) may be slow to process in the browser.
  • Does not validate responses against an OpenAPI spec — use a contract testing tool for that.

Related resources

Related tools

Related prompts

Related guides

Frequently asked questions

Can it compare XML as well as JSON?v

Yes. Paste XML responses and the tool parses them into a comparable structure, highlighting element and attribute differences.

Does it handle nested objects and arrays?v

Yes. The diff is recursive — nested objects and array elements are compared at every depth level.

Can I use this for GraphQL responses?v

Yes. GraphQL responses are JSON — paste the `data` object from two responses and the tool diffs them normally.