ABA Routing Number Generator

Generate ABA routing numbers with correct checksum structure for payment forms, ACH onboarding, banking integrations, and test data setup. Great for non-production environments.

What is this generator?

Generate ABA routing numbers with correct checksum structure for payment forms, ACH onboarding, banking integrations, and test data setup. All values are synthetic and computed locally in the browser.

How to use

Click Generate to get a synthetic ABA routing number.
Click the row or use Copy to bring the value into your test.
Use the number in payment forms, sandbox setups, or ACH testing fixtures.

Synthetic documents

Click Generate to create test values.

Generated values are for software testing, QA, demos, and mock data only.

Practical example

Use the generated routing number in an automated Playwright test:

// Playwright test
await page.fill('[name="routingNumber"]', '021000021')
await page.fill('[name="accountNumber"]', '123456789012')

Replace with the values generated by the tool.

API

For automations, integrations, and CI pipelines, see the API documentation.

📘 View API Docs

What it's for

💳

ACH testing

Exercise payment and payout forms safely in test flows

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Sandbox setups

Use structured routing numbers in demos and fixtures

✅

Checksum coverage

Verify front-end and back-end routing validation logic

🗄️

Sample records

Populate internal tools and tables with realistic banking data

Privacy and synthetic data

Generated routing numbers are synthetic and intended only for software testing. The tool runs in the browser and must not be used to represent real bank routing numbers or initiate financial transactions.

Frequently asked questions

Are the generated routing numbers real?

No. The values are synthetic and pass ABA checksum validation but do not represent any real financial institution.

Can I use these in production?

No. These values are intended exclusively for software development and testing environments.

Is the checksum correct?

Yes. Generated routing numbers pass the standard ABA checksum algorithm used by US payment systems.

When to use

🧪

Testing and QA

Validate inputs, outputs, and UI rules in controlled scenarios.

💻

Development

Use fast browser output while debugging, prototyping, and integrating systems.

📋

Documentation

Create reproducible examples for tickets, specs, and technical reviews.

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Local workflows

Most operations run in the browser with no sign-up and no installation.

Limitations / when not to use

Use this tool for development, QA, documentation, and demos. Do not paste production secrets, private credentials, customer data, or information that should stay inside your controlled environment.