Free online SQL CREATE TABLE statement generator with visual table structure design, supporting MySQL, PostgreSQL, and SQLite.
TL;DR: Free online SQL CREATE TABLE generator with visual table structure design. Supports MySQL, PostgreSQL, and SQLite dialects. Generate CREATE TABLE statements in one click, runs locally with no data leakage.
For local tools, open DevTools → Network and search your input — it should not appear in requests.
Usage Guide
Designing database table structures by hand-writing CREATE TABLE is slow and error-prone for field types and constraints. This tool generates MySQL / PostgreSQL / SQLite compatible DDL through a form interface defining column names, types, indexes and constraints, with local generation and no database connection needed.
1. How to use
- Enter table name, add fields row by row (column name, type, length, nullable, default value).
- Select target database (MySQL / PostgreSQL / SQLite); the tool adjusts syntax differences automatically.
- Add primary keys, unique indexes and foreign key constraints to generate complete CREATE TABLE statements.
2. Common field type mistakes
- VARCHAR(255) is not a universal default — choose based on actual max length: VARCHAR(50) for names, VARCHAR(255) too small for JSON.
- TEXT cannot have defaults in MySQL but can in PostgreSQL — watch this difference during cross-DB migration.
- INT vs BIGINT: use BIGINT for 10M+ rows, INT is sufficient for under a million — do not waste storage.
- Use TIMESTAMP or DATETIME for time fields; storing dates as VARCHAR breaks sorting and range queries.
3. Design-to-production checklist
Do not execute generated DDL directly — run through a checklist: created_at / updated_at timestamps present? Soft delete flag (is_deleted / deleted_at)? Field comments clear (for future you and teammates)? Primary key strategy auto-increment INT or UUID? Indexes covering common query conditions (WHERE / JOIN / ORDER BY)? These are far cheaper to finalize at design time than altering tables after launch. Use markdown-table-to-sql to cross-validate the generated design.
FAQ
No. DDL is generated locally in the browser and the page keeps nothing. Once a statement is copied out, its destination — especially for tables with sensitive columns — is your call.
Three mainstream dialects: MySQL, PostgreSQL, and SQLite, with automatic adaptation of data types and syntax differences. One click switches the generated CREATE TABLE statement.
Common properties such as column name, data type, primary key, NOT NULL, auto increment, default value, and comment, plus checkboxes for indexes and other constraints. The generated DDL can be pasted straight into a migration file.
Not recommended. Treat the output as a draft: try it on a local database first, run it through your migration tool, and have a DBA or reviewer check it before release — executing unreviewed DDL on production is high risk.
Three classic divergence points: auto-increment is realized differently across dialects (sequences vs auto-increment), charset and collation clauses differ, and whether foreign keys are enabled follows team convention. Re-check each item after switching dialects.
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