Local-first Mermaid export · no signup · no watermark

Free Mermaid to Image Converter

Paste Mermaid code, preview instantly, and export PNG, SVG, JPG, WebP, or PDF with transparent backgrounds and docs-ready presets — all in your browser.

Convert My Mermaid Diagram — Free Compare Export Styles

Your diagram code stays local · PNG, SVG, JPG, WebP, PDF

Paste or edit Mermaid code

Replace the sample below, or load another example.

Tip: click inside the editor and paste your Mermaid code.

Live previewFlowchart · Clean Docs

Render & export

Default for debugging; optimized for downloads.

Flowchart

Mode

Export style

Scale

px wide

Output: White · comfortable padding

Size: render a valid diagram to calculate

Filename: mermaid-flowchart-white-2x.png

Format-specific workflows

Need a specific Mermaid export format?

Use the main converter above for fast export, or open a focused workflow when you already know the destination: PNG for docs, SVG for vectors, PDF for handoff, transparent backgrounds for slides, or 4x output for sharp publishing assets.

JPG fallback WebP for web pages PDF for docs Syntax Checker Markdown Export

Mermaid to PNG

Most compatible

Best default for slides, docs, README files, and transparent diagram assets.

Open workflow →

Mermaid to SVG

Vector

Use scalable vector output for static docs, developer handoff, and resizing without blur.

Open workflow →

Transparent Background

Slides

Export diagrams that sit cleanly on dark docs, branded cards, and presentation slides.

Open workflow →

High Resolution Export

2x / 4x

Start at 4x for crisp labels, arrows, and connectors in decks or retina documentation.

Open workflow →

Paste, Optimize, Export

Paste Mermaid Code

Drop in a flowchart, sequence diagram, ERD, Gantt chart, mind map, or architecture diagram.

Optimize the Export

Choose a clean preset, background, padding, and scale while checking the final pixel size.

Download PNG, SVG, JPG, WebP, or PDF

Export a named, crisp asset for docs, slides, blogs, README files, handoff PDFs, or Markdown workflows.

Built for where Mermaid diagrams actually go

Each card shows a destination-specific export, not a generic format badge.

README.mdPNG

GitHub README Diagrams

Export a compact PNG/WebP that still reads inside README files, release notes, and project documentation.

README · PNG

architecture.mdC4

Architecture Docs

Keep system diagrams local while preparing crisp visuals for internal docs, ADRs, and security reviews.

System · JPG

slide 04 / rollout16:9

Slides and Presentations

Use transparent backgrounds, larger padding, and 4x scale so arrows and labels stay sharp on big screens.

Slides · 4x PNG

article heroWebP

Technical Blogs

Create warm editorial cards or lightweight WebP diagrams that look intentional inside long-form posts.

Blog · WebP

Export quality, not just a screenshot

Tune the final image before download: format, scale, background, padding, filename, and final pixel size.

Watermark-Free PNG Export

Download clean Mermaid diagrams without a product logo stamped onto your documentation assets.

Transparent Backgrounds

Preview the checkerboard and export transparent PNGs for slides, decks, and mixed page backgrounds.

One-Click Export Optimization

Apply a presentation-ready preset with transparent background, larger padding, and 4x scale.

High-Resolution Export

Choose 1x, 2x, or 4x output and see the exact pixel dimensions before downloading.

Local-First Rendering

The core render and raster export happen in your browser, without uploading diagram content.

Documentation Presets

Start from README, dark docs, presentation, and editorial styles instead of tuning raw variables.

Choose a style before you export

The same Mermaid diagram rendered as real destination previews for README files, slides, dark docs, whiteboard explainers, and technical blogs.

Open full theme gallery →

Clean Docspreview

Clean Docs

Best for documentation.

Sketch Paperpreview

Whiteboard Sketch

Best for workshops and architecture notes.

Transparent Docspreview

Transparent Docs

Best for slides and README files.

Dark exportpreview

GitHub Dark

Best for dark docs.

GitHub READMEpreview

GitHub README

Best for README files.

Slide exportpreview

Slide Dark

Best for slides and decks.

Warm Editorialpreview

Warm Editorial

Best for editorial posts and long-form docs.

Deep Oceanpreview

Deep Ocean

Best for dark decks with cool accents.

Free Mermaid export, no signup

Free

PNG, SVG, JPG, WebP, and PDF downloads
No watermark
Transparent background for PNG/SVG
1x / 2x / 4x export
Light and dark theme presets
Your diagram code stays in your browser

Export My Diagram — Free

Planned

Advanced workflows

The core exporter stays free. Batch and workflow features may be added for users who export Mermaid diagrams often.

Batch export from Markdown
ZIP downloads
Higher-resolution exports
Saved custom themes
Workflow integrations

Have a feature request? Email hello@mermaidonline.org.

FAQ

Is this Mermaid to PNG converter free?

Yes. The core tool lets you export PNG, JPG, WebP, SVG, and PDF without signup or watermark. Future paid features may focus on batch workflows, API access, or advanced export automation.

Does my Mermaid code get uploaded?

For the core editor and export workflow, Mermaid code is processed locally in your browser and is not uploaded to our server.

Can I export with a transparent background?

Yes. Choose Transparent in the export style settings, then download PNG or WebP for slides, docs, and design tools.

How high can I export?

The free tool supports 1x, 2x, and 4x image/PDF export. Higher scales may be added later for Pro workflows if browser memory allows.

Is this affiliated with Mermaid.js or Mermaid Chart?

No. This is an independent tool and is not affiliated with Mermaid.js, Mermaid Chart, or their maintainers.