Sqemo
DBDiagram.io
DrawSQL
Vertabelo
ChartDB
DbSchema
ER/Studio
erwin Data Modeler
CodeHerald
Sqemo is an ERD tool built around one idea: physical names should be generated from your team's naming standard, not typed by hand.
You register a word list (customer โ cust, number โ no) and naming rules (case style, delimiter, how to handle unknown words) first. Then you model at the logical level โ "Customer Number" โ and the physical column comes out cust_no, the same way for everyone, every time. Overrides are allowed but explicitly flagged, so they never spread silently. Because the correct name is computable, drift is detectable: an in-app linter flags deviations, and a CLI fails CI on violations (npx sqemo-mcp lint).
Key capabilities: โข Logical/physical model separation with stable links between the two โข SQL DDL import/export in seven dialects: MySQL, PostgreSQL, Oracle, SQL Server, SQLite, H2, CUBRID โข DBML import/export โ one round trip to move from dbdiagram โข Runs free in the browser with no sign-up; projects autosave locally and live in a plain .erd.json file you can commit โข MCP server (sqemo-mcp) with 36 tools โ AI agents read and edit your ERD while following your naming standard โข Team workspaces: shared standard, proposeโapprove queue for new words, and a compliance view showing which ERDs drift from the standard
CodeHerald provides a new way to keep track of your code review queue, grouped by your next action needed.
If any of the above is true, CodeHerald will help you.
CodeHerald groups pull requests by next action: must review, needs an update, can be merged. It allows you to replace slack, emails, filters, and browser bookmarks with one single page that you can open at a glance and decide which PR to tackle next.
Sqemo
CodeHeraldDBDiagram.io - Free database diagrams designer for analysts & developers ๐
DrawSQL - Easy database diagrams. Create, visualize and collaborate on your database entity relationship diagrams.
Vertabelo - Online tool for visual database design.
ChartDB - Visualize your DB via one-single query. Free and open source, database design editor.
DbSchema - DbSchema - Visual Database Design & Management Tool
ER/Studio - ER/Studio is the most comprehensive data modeling suite, connecting data modeling with data governance to deliver a future-proof framework for your enterpriseโs data.