What is a Fishbone Diagram?

A Fishbone Diagram, also called Ishikawa Diagram or Cause-and-Effect Diagram, was developed by Japanese quality expert Kaoru Ishikawa. It structures a problem (fish head) with possible causes (fish bones) to help teams systematically analyze root causes.

When should I use a Fishbone Diagram?

Use it for: quality problem root cause analysis, project issue troubleshooting, business process optimization, product defect analysis, incident investigation, and brainstorming sessions.

5M1E is the most common Fishbone analysis framework: Man, Machine, Material, Method, Measurement, Environment. It helps you analyze problems comprehensively from multiple dimensions.

Can I export the diagram?

Yes. Click the 'Export Image' button to save the fishbone diagram as a PNG file, perfect for inserting into reports or sharing with your team.

Completely secure. All operations happen locally in your browser. Diagram data is never uploaded to any server.

Can I customize categories?

Yes. Beyond preset templates (5M1E, 4P, 4S), you can fully customize each category name and sub-causes for any analysis scenario.

Fishbone Diagram Generator - Root Cause

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Free online Fishbone Diagram (Ishikawa / Cause-and-Effect) generator. Visual root cause analysis with customizable categories. Export to PNG. 100% client-side. | No signup · Data never uploaded

Zero Dependencies·Works Offline

⚙️ Settings

Problem (Fish Head)

Template

🐟 Fishbone Diagram Generator

⚙️ Settings

📊 Fishbone Diagram Preview

🐟 Fishbone Diagram Generator

⚙️ Settings

📊 Fishbone Diagram Preview

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