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Flowchart, Sequence & ER Diagram Studio

Author deterministic Flowcharts, Sequence Diagrams, and Database Entity-Relationship (ER) schemas from clean text DSLs with live SVG layout and high-DPI PNG/SVG export.

100% Local Browser Engine · Zero Uploads4 Workspaces

Flowchart DSL → SVG: Write Mermaid-compatible flowchart syntax (TD or LR, rounded, decision diamonds, stadium pills, labeled edges) and render pure vector SVG.

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What is Flowchart, Sequence & ER Diagram Studio?

Diagram & Architecture Studio compiles concise Mermaid-compatible text definitions for Flowcharts (TD/LR DAGs), API Sequence Diagrams, and relational Entity-Relationship Diagrams (ERDs) directly into clean vector SVG and 2× PNG graphics.

How to use Flowchart, Sequence & ER Diagram Studio in 3 steps
  1. 1

    Select Flowchart, Sequence, or ERD mode

    Start from a built-in architecture template or write concise node/edge lines.

  2. 2

    Preview live vector SVG

    Nodes, decision diamonds, lifelines, and PK/FK schema tables lay out automatically as you type.

  3. 3

    Export .SVG or 2× .PNG

    Embed crisp vector diagrams in READMEs, RFCs, and architecture docs.

Key features and benefits
  • Zero external rendering servers or third-party iframes — pure local SVG generation.
  • Supports Flowchart TD/LR, Sequence solid/dashed messages, and ERD PK/FK/UK badges.
Common use cases

Illustrating OAuth/PKCE request sequences for engineering design docs.

Sketching PostgreSQL table relationships for pull request descriptions.

Why browser-based works better

Flowchart, Sequence & ER Diagram Studio consolidates related developer & code studios workflows into one cohesive, multi-mode browser studio — eliminating tab-hopping across fragmented single-purpose tools.

Every mode executes locally using Web APIs and audited client-side libraries, so private files, tokens, and source code never leave your device.

You might also need

Continue this workflow with nearby browser-based tools so you can validate, convert, and ship output without context switching.

Flowchart, Sequence & ER Diagram Studio FAQs

Quick answers about the workflow, privacy, and where this tool fits in a broader job.

Are architecture diagrams sent to an external diagram API?

No. Layout and SVG serialization run 100% locally in browser TypeScript.

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Built and maintained by

Free AI Tools Engineering Team

Browser Tooling & Web Platform Engineering

Last updated:

Tested in Chrome, Firefox, and Safari on desktop and mobile.

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