TToolumina
5 step tool chain

API JSON Debug Workflow

Clean, compare, validate, and transform API data while keeping payloads local.

Best for

Developers, QA engineers, API support teams, and technical product managers.

Final outcome

Formatted JSON, clear diffs, validation results, and transformed data for handoff.

Privacy model

Most steps run locally in your browser. External research steps clearly open an external provider only when you choose to continue.

Step-by-step chain

Open each tool in order, then move the output into the next step when it applies.

All workflows
  1. 1

    Format the raw response

    JSON Formatter

    Pretty-print minified JSON and catch syntax errors early.

    InputRaw JSON from an API response, log, or clipboard.OutputReadable formatted JSON.
    Open tool
  2. 2

    Compare expected and actual data

    JSON Compare and Diff Tool

    Find changed fields, missing values, and structural differences.

    InputTwo JSON payloads.OutputA JSON difference report.
    Open tool
  3. 3

    Validate against a schema

    JSON Schema Validator

    Check whether a payload follows the expected contract.

    InputJSON payload plus JSON Schema.OutputValidation pass/fail details.
    Open tool
JSON FormatterFormat and validate JSON in the browser before using other JSON tools.JSON Compare and Diff ToolCompare two JSON snippets and review added, removed, changed, and type-changed fields.JSON Schema ValidatorValidate JSON against a local schema and locate missing fields, type errors, and rule failures.