Correlation-ID generator — Free browser-based correlation-id generator for API, webhook, and localhost tunnel workflows — runs locally without uploading secrets.
Use this correlation-id generator 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 Correlation-ID generator 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 correlation-id generator 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.