Question 1

Which CNAB layouts are supported?

Accepted Answer

The tool currently supports converting remittance to return files in CNAB 240 and CNAB 400 layouts, focusing on Bradesco and Itaú banks. Other banks and layouts may be added in the future.

Question 2

Are my files sent to any server?

Accepted Answer

No. Security is our priority. All processing and file conversion happens 100% in your browser (client-side). No CNAB file data is sent to our servers.

Question 3

What is this tool for?

Accepted Answer

It is intended for developers and QA analysts who need to simulate receiving a bank return file to test reconciliation logic, payment write-offs, and other processes in their systems, without depending on a real banking environment.

Question 4

Does the conversion change all fields to a real return?

Accepted Answer

No. The tool changes the essential fields to simulate a successful return (settlement), such as the remittance/return code and occurrence codes. The specific details of changes for each bank (Bradesco and Itaú) are documented in the 'Changed Fields' table on this page.

CNAB Converter

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Fields Changed in Conversion

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About the CNAB Converter

Frequently Asked Questions (FAQ)