SchemaLens for VS Code

Open the SchemaLens schema diff tool directly from VS Code.

Features

Open SchemaLens — Launch the browser-based diff tool in one keystroke.
Diff Active SQL Files — Compare the two open SQL files instantly. SchemaLens auto-detects your SQL dialect and generates a shareable diff URL.

Usage

Command Palette

Command	What it does
`SchemaLens: Open SchemaLens`	Opens https://schemalens.tech/app.html in your default browser.
`SchemaLens: Diff Active SQL Files`	Reads the two active `.sql` editors, encodes them, and opens SchemaLens with both schemas pre-filled.

Right-click a SQL file

Right-click any .sql file in the editor tab and choose "Diff Active SQL Files".

How it works

The extension encodes your SQL using the same base64 format as SchemaLens's native Share button. Everything stays local — your schemas are never uploaded to a server. The generated URL is processed entirely in your browser.

Requirements

VS Code 1.74+
A default web browser

Dialect detection

The extension guesses the SQL dialect from your file name:

File name contains	Dialect
`mysql`, `mariadb`	MySQL
`sqlite`	SQLite
`mssql`, `sqlserver`	SQL Server
`oracle`	Oracle
anything else	PostgreSQL

You can always change the dialect inside SchemaLens after the page loads.

Privacy

Your SQL never leaves VS Code or your browser. The extension generates a local URL hash — there is no network request until you open the URL in your browser, and even then SchemaLens runs entirely client-side.

License

MIT

SchemaLens

Schemalens