About ACH File Converter

ACH File Converter is a free browser-based toolkit for creating, converting, validating, viewing and repairing NACHA-formatted ACH files. Files are processed locally on your device.

We are not a bank or ACH processor. The application does not transmit files, initiate payments, verify authorization or guarantee that a financial institution will accept a file. Confirm production settings and operating requirements with your bank.

Editorial responsibility

Content is published by the ACH File Converter Editorial Team. We aim to explain ACH file mechanics clearly, distinguish technical validation from authorization or compliance, and state product limitations directly. Educational rule references are reviewed against Nacha materials and should be confirmed with your ODFI for production decisions.

Corrections and contact

If you find an error or want to suggest an improvement, visit our Contact page. Never send live banking data or an unmasked ACH file by email.