Raw body vs parsed JSON comparator — Free browser-based raw body vs parsed json comparator for API, webhook, and localhost tunnel workflows — runs locally without uploading secrets.
Use this raw body vs parsed json comparator when you need fast, private debugging during local development — especially for webhook delivery, OAuth callbacks, and API integration work where spinning up staging is too slow. The interactive panel runs entirely in your browser: paste payloads, headers, URLs, or tokens and get immediate validation, formatting, or generated snippets. Nothing is sent to PortPreview servers unless you explicitly use tunnel features. Each page includes step-by-step usage, common mistakes, provider-specific notes where relevant, and links to related tools plus PortPreview articles. Pair with `npx portpreview
What this tool does
The Raw body vs parsed JSON comparator helps you work faster during local API and webhook development. Paste input directly into the panel above and get immediate feedback without installing desktop software or sending secrets to a remote server.
When developers use it
Reach for this tool when debugging webhook payloads, validating headers, formatting JSON, or preparing HTTP snippets before you wire up a tunnel for live provider callbacks. It is especially useful when staging is unavailable or too slow for quick iteration.
Step-by-step in the browser
- Open the tool panel and paste your payload, URL, headers, or token material.
- Review formatted output, validation messages, or generated snippets.
- Copy results into your app, tests, or API client.
- When a provider requires a public HTTPS URL, run
npx portpreview 3000and register the tunnel URL.
Input/output examples
Start with realistic webhook or API samples from your provider docs. The raw body vs parsed json comparator highlights syntax errors, missing fields, and encoding issues so you can fix problems before events hit your local server.
Common mistakes and fixes
- Wrong encoding: ensure raw body vs parsed JSON matches what your signature verifier expects.
- Missing headers: webhook providers often require specific header names — compare against official docs.
- Localhost-only URLs: external services cannot call
127.0.0.1; use an HTTPS tunnel for delivery tests.
Security and privacy (client-side processing)
Processing happens in your browser tab. PortPreview does not store pasted secrets unless you separately use tunnel or account features. Avoid pasting production credentials; use test-mode keys and rotate anything accidentally exposed.
Related tools in this category
Browse related tools in the same category below for complementary validation, formatting, and debugging workflows. Combining a formatter with a signature verifier and a tunnel checklist covers most webhook integration tasks.
Connect with PortPreview tunnels
When your workflow needs inbound HTTP from Stripe, GitHub, OAuth providers, or messaging platforms, expose localhost with npx portpreview <port>. PortPreview preserves headers for signature verification and gives you a stable HTTPS URL for Dashboard configuration.