SQL Ddl Schema Visualizer | Free Online Tool

What is the SQL DDL relationship diagram viewer?

Parse CREATE TABLE, fields, Primary Key and Foreign Key, and output Schema summary and data table association diagram. ToolHub places the core computing entirely within the browser, allowing immediate use on both desktop and mobile devices, without the need to register an account or send content to the backend.

How to use this tool?

Enter the data according to the field prompts and select the required processing method.
Click "Process Now" to view the results, indicator summary and necessary error messages.
After confirming that the content meets actual needs, you can copy the results or download them into files for further use.

Suitable use cases

Repository documentation, migration reviews, legacy system inventory and API design. All processing is completed in the current page, which is especially suitable for workflows that do not want to post internal data to remote services.

Interpretation of results and precautions

It is not connected to the database and only covers common DDL, Stored Procedure and special dialects that require manual review. Tools will validate basic input formats and provide readable error messages, but production environments should still be reconfirmed against source specifications, business rules, or professional requirements.

Browser and device support

SQL Ddl Schema Visualizer supports current Chrome, Edge, Firefox, and Safari releases. Mobile and desktop layouts use the same validation rules documented on this page.

Frequently Asked Questions

Will the SQL DDL graph viewer upload data to the server?

No. Tool functions are executed directly within the current browser tab, and input and generated results will not be uploaded or saved by ToolHub.

What use cases is the SQL DDL Diagram Viewer suitable for?

Database documentation, migration review, legacy system inventory and API design

Do I need to install software before using the SQL DDL diagram viewer?

No need. Use a desktop or mobile browser that supports modern JavaScript, and no account is required.

What are the limitations of this tool?

It is not connected to the database and only covers common DDL, Stored Procedure and special dialects that require manual review.

Is manual inspection required after the results are generated?

Needed. Tools can assist with calculations, conversions, or formatting, but before going online, importing data, or making business decisions, the results should still be reviewed according to actual specifications.

SQL Ddl Schema Visualizer: inputs, output, and reproducible example

Use the free SQL Ddl Schema Visualizer online. Fast, private, mobile-friendly, and processed directly in your browser.

What this page actually processes

Field	Control	Default example	Validation role
SQL DDL	Multiline text	`CREATE TABLE users ( id INTEGER PRIMARY KEY, email VARCHAR(255) NOT NULL, name VARCHAR(100) ); CREATE TABLE orders ( id INTEGER PRIMARY KEY,`	SQL DDL is read by the browser as a multiline text value before the tool runs.

Reproduce the built-in example

Start with SQL DDL = CREATE TABLE users ( id INTEGER PRIMARY KEY, email VARCHAR(255) NOT NULL, name VARCHAR(100) ); CREATE TABLE orders ( id INTEGER PRIMARY KEY,, then run SQL Ddl Schema Visualizer. Change one input at a time so the effect on the result remains traceable.

After validating sql ddl, the page displays its result in the output workspace and enables the relevant copy or download action.

When to use it and how to interpret the result

Limits and checks before use

Page verification record

Controls inspected1 documented inputsResult pathValidate → process → review → copy/downloadLast content review2026-09-02