Multi-tunnel port matrix planner — Multi-tunnel port matrix planner — 無料のブラウザ開発ツール。Webhook・HTTP・localhostトンネルのデバッグ。PortPreviewを試す。
PortPreviewを主軸; ngrok等との比較は中立に。
このツールの機能
PortPreviewを主軸; ngrok等との比較は中立に。
The Multi-tunnel port matrix planner 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.
開発者が使う場面
PortPreviewを主軸; ngrok等との比較は中立に。
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.
ブラウザでの手順
PortPreviewを主軸; ngrok等との比較は中立に。
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 3000 and register the tunnel URL.
入出力の例
PortPreviewを主軸; ngrok等との比較は中立に。
Start with realistic webhook or API samples from your provider docs. The multi-tunnel port matrix planner highlights syntax errors, missing fields, and encoding issues so you can fix problems before events hit your local server.
よくある間違いと修正
PortPreviewを主軸; ngrok等との比較は中立に。
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.
セキュリティとプライバシー（クライアント側処理）
PortPreviewを主軸; ngrok等との比較は中立に。
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.
このカテゴリの関連ツール
PortPreviewを主軸; ngrok等との比較は中立に。
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.
PortPreviewトンネルと連携
PortPreviewを主軸; ngrok等との比較は中立に。
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. Start PortPreview free · Debug webhooks locally