Mermaid Git Graph Viewer
Render Mermaid gitGraph diagrams in your browser. Visualize Git branch strategies and commit histories. Export to SVG or PNG.
Enter Mermaid code to preview your diagram
Git graph diagrams visualize branching strategies, merge patterns, and commit histories in software development. They are invaluable in engineering team documentation — explaining a Gitflow strategy, illustrating a feature branch workflow, or showing how a hotfix propagates from production back to development. Mermaid's `gitGraph` syntax generates these visuals directly from text, making them easy to embed in READMEs, onboarding guides, and runbooks. AI assistants frequently produce Mermaid git graphs when developers ask 'Show me how Gitflow works', 'Diagram the branch strategy for a trunk-based development workflow', or 'Illustrate how a hotfix would merge in our release process'. Pasting the output into Zolkit renders the branch visualization immediately, letting engineering leads verify the workflow is accurately represented before distributing it to the team. Zolkit's git graph viewer supports all `gitGraph` constructs: commit IDs and tags, branch creation and checkout, merge commits, cherry-pick, and the `type` property for highlighting commits as HIGHLIGHT, REVERSE, or NORMAL. Multiple branches render in distinct colors for immediate visual differentiation.
Free Online Mermaid Diagram Viewer and Exporter
Zolkit's Mermaid Diagram Viewer lets you paste any Mermaid code and see a rendered diagram instantly — no installation, no sign-up, no server uploads. Everything runs in your browser, making it the fastest way to verify AI-generated diagrams from Claude, ChatGPT, or Gemini. Supports all major Mermaid diagram types: flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, state diagrams, mind maps, Git graphs, pie charts, and timelines.
Instant Live Preview
Diagrams render automatically as you type, with a 300ms debounce so it never feels sluggish.
100% Private
All rendering happens in your browser using mermaid.js. Your code is never sent to any server.
Export SVG & PNG
Download your diagram as a crisp vector SVG or a high-resolution 2× PNG ready for docs and slides.
All Mermaid Diagram Types
Supports flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, mind maps, Git graphs, and more.
AI Diagram Ready
Built for the AI era — directly preview diagrams generated by Claude, ChatGPT, Gemini, or any LLM.
Always Free
No account needed, no usage limits, no watermarks. Zolkit's Mermaid viewer is completely free forever.
How to Preview a Mermaid Diagram
- 1
Paste your Mermaid code into the editor on the left — you can copy it from an AI assistant or write it manually.
- 2
The diagram renders instantly in the preview panel on the right. If there's a syntax error, a message explains the issue.
- 3
Click 'Export SVG' or 'Export PNG' to download your diagram as a file ready for documentation, slides, or sharing.
Frequently Asked Questions
How do I add commit IDs and tags to a Mermaid git graph?
Use `commit id: "commit-message"` to add a label to a commit, and `commit id: "v1.0" tag: "v1.0.0"` to attach a version tag. Tags render as small badges on the commit node, making release points immediately visible. Commit IDs can also be used as references for cherry-pick operations: `cherry-pick id: "commit-id"`.
How do I merge branches in a Mermaid git graph?
After creating and populating a branch, checkout the target branch and use `merge branchName`. Example: `checkout main` then `merge develop`. You can add `id` and `tag` to the merge commit: `merge feature/auth id: "Merge auth" tag: "v2.0"`. Mermaid renders the merge as a connecting line between the two branch tracks.
Can I change the orientation of the git graph?
Yes. Add `LR` after `gitGraph` for a left-to-right layout: `gitGraph LR:`. The default is left-to-right. For documentation that will be read vertically (like a README rendered on mobile), you can experiment with `TB` (top-to-bottom), though LR is the conventional direction for git history visualization.
What's the difference between gitGraph and a sequence diagram for documenting Git workflows?
gitGraph is purpose-built for showing branching, merging, and commit history — it renders the familiar parallel branch lanes that developers recognize from tools like GitKraken or GitHub's network graph. A sequence diagram, by contrast, shows interactions between actors over time but doesn't convey branching structure. For documenting a Git workflow or release process, gitGraph is always the right choice.