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SPECIFICTION
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ERD Designer

kajitiluna.github.io

Free plan WebBrowser extension
Visit kajitiluna.github.io
Spec score 7.6 #17 of 35 in Database Design Tools

Spec sheet

Purpose
ERD Designer is a free, open-source tool for visually designing database schemas.Read 8 Oct 2026 · github.com
Integrations
The product is available in a browser, as a VSCode extension, and as a Google Drive app; its agent plugin supports Claude Code and GitHub Copilot CLI.Read 8 Oct 2026 · github.com
Support
The project directs users to GitHub Issues for bug reports and feature requests.Read 8 Oct 2026 · github.com
Database support
It generates DDL for PostgreSQL, MySQL, MariaDB, MS SQL Server, SQLite, BigQuery, and Snowflake.Read 8 Oct 2026 · github.com
Experimental features
The agent plugin and MCP server are marked experimental, and their behavior or tool surface may change between releases.Read 8 Oct 2026 · github.com
Google Drive access
The Google Drive app says it reads and writes only files opened with it and files it creates, and does not browse the rest of Drive.Read 8 Oct 2026 · workspace.google.com
Import and export
It can import existing DDL and export table specifications as Excel files or Google Spreadsheets, and diagrams as PNG, SVG, or interactive HTML.Read 8 Oct 2026 · github.com
Local storage
The browser version stores design data locally in the browser using IndexedDB.Read 8 Oct 2026 · github.com
Reusable columns
Column Share Models allow a column definition to be reused across tables, while Column Groups apply common columns in bulk.Read 8 Oct 2026 · github.com
Schema verification
A separately installed CLI can compare designs with database schemas or revisions; its database comparison is read-only and its migration command only drafts SQL.Read 8 Oct 2026 · github.com
Team editing limit
Google Drive files can be viewed simultaneously, but simultaneous editing is not supported.Read 8 Oct 2026 · workspace.google.com
Visual design
Users can arrange tables on an interactive canvas and define relationships visually, with automatic foreign-key synchronization.Read 8 Oct 2026 · github.com

Plans and prices

Free Free Free of charge No installation or account required for browser version · Google Drive simultaneous editing is not supported Read 8 Oct 2026 · workspace.google.com

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