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Routing Number Generator

Bulk-generate ABA-valid US routing numbers for QA. 9 digits, valid checksum, ready for payment form tests, ACH integration fixtures, and database seeding. Runs in your browser.

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How It Works

  1. 1

    Pick quantity

    1 to 100 routing numbers per batch.

  2. 2

    Choose a format

    Plain text, CSV, JSON, JS array, or Playwright.

  3. 3

    Generate

    Each routing number is 9 digits with valid ABA-9 checksum.

  4. 4

    Copy or download

    Drop into your payment form tests, ACH fixtures, or CRM seed.

Use Cases

  • Payment form tests

    Verify your bank account form accepts ABA-valid routing numbers.

  • ACH integration tests

    Seed test transactions in a sandbox without using real bank routing numbers.

  • Database fixtures

    Populate `bank_account.routing_number` columns for end-to-end tests.

  • Onboarding flow QA

    Test KYC and bank-link onboarding flows with always-valid synthetic numbers.

Frequently Asked Questions

A 9-digit code that identifies a US bank or credit union for ACH transfers, wire transfers, and check processing. Every routing number is validated with the ABA-9 checksum: `3*(d1+d4+d7) + 7*(d2+d5+d8) + 1*(d3+d6+d9)` must be divisible by 10.
No. They are synthetically generated and pass the ABA-9 checksum, but are not assigned to any real bank. Use them as test data for forms, ACH validators, and database fixtures. They will fail any real Federal Reserve E-Payments routing directory lookup.
We generate 8 random digits, then compute the check digit (d9) such that the weighted ABA-9 sum is divisible by 10. The output passes every standard routing number validator.
To populate ACH and wire transfer forms, payment processor sandboxes, and database fixtures without using a real bank's routing number. Which could be misinterpreted by your system as live data.
Yes for checksum validation. They will not pass validators that look up the number in the ABA / Federal Reserve directory.
Yes. Pick the Playwright format to get a ready-to-paste test loop.
No. Generation runs entirely in your browser.

Generated the test data. Now automate the payment flow.

Bug0 writes end-to-end tests for ACH onboarding, bank linking, and money movement. From plain English. Forward-deployed engineers review every failure before it reaches production.

From $2,500/mo. Results in 7 days.

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