SQL to Knex.js Converter

Convert raw SQL queries into idiomatic Knex.js query builder chains for Node.js and TypeScript.

At a glance

SQL to Knex.js Converter is a free developer utility that transforms raw SQL queries into clean, idiomatic Knex.js query builder method chains for Node.js. It translates SELECT, INSERT, UPDATE, DELETE, multi-table JOINs, nested WHERE filters, GROUP BY, and ORDER BY clauses 100% client-side in browser memory with zero server calls.

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100% Client-Side SQL to Knex.js Converter

Zero Server Uploads

Translate raw SQL queries into clean, idiomatic Knex.js query builder chains directly in browser memory without sending confidential schema details or table records to any remote server.

Local Sandbox
Presets:
0 lines • 0 chars
Knex.js Code Options
Waiting for input
Query Type SELECT
Target Table users
Filters & Joins None

Why Use This SQL to Knex.js Converter?

100% Client-Side Privacy: Your database schemas, table structures, and queries never leave your browser.
Complete CRUD Translation: Supports SELECT with aggregates, INSERT with rows, UPDATE with SET, and DELETE.
Multi-Table JOIN Support: Maps INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN with column equality conditions.
Filter Translation: Accurately converts complex WHERE conditions, WHERE IN arrays, IS NULL, and BETWEEN ranges.
Flexible Output Styles: Generate async/await code, promise chains with .then(), or standalone query builder expressions.
Export & Copy: One-click clipboard copy and downloadable .js query script files.

How to Use SQL to Knex.js Converter

1

Enter SQL Query

Paste your raw SQL SELECT, INSERT, UPDATE, or DELETE query into the editor or upload a .sql file.

2

Select Code Style

Choose between Async/Await, Chained expression, or Promise callback (.then) formatting.

3

Copy or Download Knex Code

Click Copy Code or Download .js to paste directly into your Node.js or TypeScript backend project.

Converting SQL SELECT Query with JOIN to Knex.js

Demonstrates translating a multi-table SQL SELECT query with JOIN, WHERE filter, ORDER BY, and LIMIT into an idiomatic Knex.js query chain.

Raw SQL Query Source 
SELECT users.id, users.name, orders.total
FROM users
JOIN orders ON users.id = orders.user_id
WHERE users.status = 'active'
ORDER BY orders.created_at DESC
LIMIT 10;
Knex.js Query Builder Code Processed 
const result = await knex('users')
  .select('users.id', 'users.name', 'orders.total')
  .join('orders', 'users.id', '=', 'orders.user_id')
  .where('users.status', 'active')
  .orderBy('orders.created_at', 'desc')
  .limit(10);

Technical Specifications & Engine Details

Technical specifications and engine details for SQL to Knex.js Converter
Specification Details
Supported Formats SQL, TEXT → JAVASCRIPT, TYPESCRIPT, TEXT
Execution Mode 100% Client-Side In-Browser (client)
Browser Requirements Modern browser with JavaScript enabled.
Performance Constraints 100% Client-Side. Runs locally in browser JavaScript memory.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

All SQL queries and generated Knex.js code remain strictly in local browser memory. Zero data transmitted.

Frequently Asked Questions

Which SQL query types can this tool convert to Knex.js?
The converter supports all core SQL operations including SELECT (with column aliases, distinct, and aggregates), multi-table JOINs, nested WHERE conditions, GROUP BY, HAVING, ORDER BY, LIMIT, OFFSET, INSERT with column maps, UPDATE with SET, and DELETE.
Can this tool handle multi-table JOINs?
Yes. It parses INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN clauses with column equality conditions (ON table1.col = table2.col) and maps them to Knex.js builder methods.
Is my proprietary SQL or database schema sent to any server?
No. All SQL parsing and Knex.js code generation executes 100% client-side in your local browser JavaScript memory. Zero data is transmitted.
Can I customize the client variable name?
Yes. You can customize the Knex instance variable name (e.g. knex, db, or client) to match your application's database connection conventions.

Methodology

This tool runs entirely in your browser. The example above shows a representative input and the result it produces.

Last updated .

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