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Erweiterte VorschauKeine KILokale VorschauExportDebugging

HAR-Datei-Viewer

Füge Inhalte für HAR-Datei-Viewer ein und erzeuge eine lokale, prüfbare Vorschau für Konfigurationen, API-Antworten, SEO-Dateien und AI-generierte Snippets.

Beispiele
Detected JSON

This input may work better in the matching tool. Open JSON tool

HAR waterfall previewBereit
Your HAR timeline will appear here.

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Nutze diese Vorschau im nächsten Workflow zum Konvertieren, Debuggen oder Exportieren.

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Verwendung

  1. 1Export a HAR file from browser DevTools after reproducing the issue.
  2. 2Paste a sanitized HAR sample and inspect request count, total time, failed calls, hosts, and slowest requests.
  3. 3Look for long waits, repeated calls, 4xx/5xx responses, large payloads, and third-party hosts.
  4. 4Share a screenshot or exported summary after removing cookies, tokens, and private headers.

Anwendungsfälle

Frontend performance debuggingAPI waterfall reviewIncident screenshotsThird-party request auditBrowser network export preview

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Mermaid AI Fixer

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Architecture Diagram Generator

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FAQ

Can I paste a production HAR file safely?

Only after sanitizing it. HAR files can contain cookies, Authorization headers, URLs with tokens, and private request bodies.

What should I inspect first?

Start with failed requests, total page time, slowest requests, duplicate calls, and unexpected third-party hosts.

Is HAR Viewer enough for root-cause analysis?

It is a triage surface. Use traces, server logs, and browser performance profiles for deeper root-cause analysis.

HAR File Viewer previews browser network exports as request timelines, status summaries, slowest calls, host breakdowns, and waterfall-style debugging notes.

It helps frontend and API engineers inspect real browser behavior without opening a heavy desktop tool or pasting sensitive logs into an AI chat.

Use it to compare page loads, explain slow endpoints in issues, prepare incident screenshots, and decide which requests deserve deeper tracing.

Demo: turn a browser export into an API debugging note

A good HAR review captures the user action, then explains which request was slow or failed. The viewer helps reduce a raw JSON export into a few facts that belong in an issue.

  • Record only the failing workflow, not a full browsing session.
  • Remove cookies, Authorization, Set-Cookie, and private query parameters.
  • Compare status codes and timings before assuming the frontend is at fault.
1. Reproduce checkout submit
2. Export HAR from DevTools Network panel
3. Remove Cookie and Authorization headers
4. Inspect failed requests and slowest calls
5. Attach screenshot plus sanitized request IDs

This workflow creates a useful bug report without exposing the entire browser session.

Performance debugging: read HAR as a waterfall, not a table

A HAR file is most useful when it explains where time is spent. Sort and group requests by navigation phase, cache behavior, blocking time, and third-party domains instead of only scanning status codes.

  • Look for long queued or blocked times before blaming the backend.
  • Group third-party scripts and fonts to see their total page cost.
  • Compare transferred size with decoded size to catch compression and cache issues.
GET /app.js 200 42ms 18KB cached
GET /api/feed 200 840ms 74KB network
GET https://analytics.example/script.js 200 310ms 92KB third-party

Review-Checkliste für HAR-Datei-Viewer

Nutze HAR-Datei-Viewer, um Quellinhalte vor Dokumentation, PR-Notizen, Incident-Berichten oder Übergaben visuell zu prüfen. HAR-Datei-Viewer: Zeige und debugge diese Quelle lokal für technische Dokumentation.

Prüfe vor dem Export Lesbarkeit, Beziehungen, sensible Daten und ob die Vorschau nach Änderungen weiterhin passt.

Grenzen und Fehlersuche

Wenn die Vorschau fehlschlägt, reduziere die Eingabe auf ein kleines vollständiges Beispiel und füge Abschnitte schrittweise zurück.

Behandle die Vorschau als Review-Fläche, nicht als Quelle der Wahrheit. Kritische Ergebnisse brauchen menschliche Prüfung.

Beispieleingaben

  • Checkout HAR: { "log": { "version": "1.2", "creator": { "name": "DiagramPreview" }, "entries": [ { "startedDateTime": "2026-06-16T10:00:00.000Z", "time": 82, "request": { "method": "GET", "url":...
  • Slow API: { "log": { "entries": [ { "time": 1280, "request": { "method": "GET", "url": "https://api.example.com/reports/monthly" }, "response": { "status": 200, "content": { "mimeType": "app...
  • Third-party assets: { "log": { "entries": [ { "time": 42, "request": { "method": "GET", "url": "https://cdn.example.com/app.css" }, "response": { "status": 200, "content": { "mimeType": "text/css" } }...

Werkzeugreife

Erweiterte Vorschau

Erweiterter Parser

Dieses Werkzeug extrahiert Struktur und Beziehungen aus Entwicklereingaben. Komplexe Randfälle sollten gegen die Quelle geprüft werden.

Das Label zeigt, ob das Werkzeug eher für stabilen Export, Debugging, schnelles Parsen oder AI-gestützte Generierung gedacht ist.