Generate a valid fictitious ACH file for testing and learning. Free, no signup, and your file is processed locally in your browser.
Primary topic: sample NACHA file generator
This page uses fictitious account information and is intended only for testing.
| # | Routing | Account | Receiver | Amount | Tx Code | Trace | Addenda | Actions |
|---|---|---|---|---|---|---|---|---|
| 1.1 | ||||||||
| 1.2 | ||||||||
| 1.3 |
Complete the file details and entry fields, then select Generate ACH file to run validation.
Output: sample-nacha-file.ach
The sample NACHA file generator creates fictitious but structurally valid ACH data for product testing, training and format exploration. Use this sample NACHA file generator as a practical first step, then review its results carefully. never submit a sample file to a live bank channel or replace fictitious values with real data casually.
A reliable sample NACHA file generator workflow starts by confirming the business purpose before changing or exporting any data. This page is designed for creates fictitious but structurally valid ACH data for product testing, training and format exploration. It performs the supported work locally, so the source does not need to be sent to a conversion service. Use the sample NACHA file generator with an approved source and a clearly defined expected result.
Start with your selected sample options such as entry count, SEC code, transaction direction and test amounts. Work from a copy, preserve leading zeros and remove unrelated report headings or totals that could be mistaken for transaction data.
Use the on-page controls, then compare the displayed batch count, entry count, total debits and total credits with the source expectation. Investigate warnings instead of assuming that a downloadable result is correct.
The expected result is a downloadable sample NACHA file with fictional receivers, valid routing checksums and consistent controls. Before transmission or downstream import, review that all data is clearly non-production, the chosen scenario matches the test and downstream systems stay isolated, save the source separately and follow your organization’s approval process.
Confirm that the selected input really contains your selected sample options such as entry count, SEC code, transaction direction and test amounts. A renamed extension does not convert a spreadsheet, PDF or binary export into a valid ACH-related source.
Compare entries one batch at a time. Missing rows, duplicated rows, amount scaling, debit-versus-credit selection and malformed addenda can all change counts or monetary totals.
Format validation does not verify enrollment or bank policy. never submit a sample file to a live bank channel or replace fictitious values with real data casually. Ask the ODFI for the rejection code and compare it with the company profile, identifiers and processing date.
It creates fictitious but structurally valid ACH data for product testing, training and format exploration. The sample NACHA file generator processes the data locally in your browser and does not require an account.
It needs your selected sample options such as entry count, SEC code, transaction direction and test amounts. Files remain on your device during processing.
You will get a downloadable sample NACHA file with fictional receivers, valid routing checksums and consistent controls. Review the result before using it in an operational workflow.
Check that all data is clearly non-production, the chosen scenario matches the test and downstream systems stay isolated. Also remember that never submit a sample file to a live bank channel or replace fictitious values with real data casually.
Collect your selected sample options such as entry count, SEC code, transaction direction and test amounts. Keep the bank-approved company settings separate from receiver details so they can be reviewed independently before generation.
Yes. Entry and addenda counts, routing hashes, debit and credit totals, batch controls, file controls, block count and type 9 padding are rebuilt from the current entries.
The software can create a technical file, but it cannot establish authorization. You remain responsible for the authorization, notice, timing and record-retention requirements that apply to each entry.
Record approved company and ODFI settings in your controlled internal documentation. Recheck them whenever your bank relationship, account, SEC code or processing instructions change.
Technical explanations are checked against these primary sources. Bank-specific requirements can be narrower than general format guidance.
Sources reviewed August 20, 2026. Nacha owns and maintains the linked materials.
ACH files use the NACHA fixed-width format: every record is 94 characters, files contain one or more batches, and control records reconcile entry counts, routing-number hashes, debits and credits. Always confirm bank-specific settings with your financial institution before uploading a production file.