The input is not recognized
Confirm that the selected input really contains an ACH file containing two or more parseable batches. A renamed extension does not convert a spreadsheet, PDF or binary export into a valid ACH-related source.
ACH file splitter
Split a multi-batch ACH file into separate validated files. Free, no signup, and your file is processed locally in your browser.
Primary topic: ACH file splitter
1
Source ACH/NACHA file
What can this ACH file splitter help you do?
The ACH file splitter separates a multi-batch NACHA file into individual files while preserving each selected batch. Use this ACH file splitter as a practical first step, then review its results carefully. splitting can change operational delivery and settlement grouping, so confirm how your bank expects batches submitted.
When should you use the ACH file splitter?
A reliable ACH file splitter workflow starts by confirming the business purpose before changing or exporting any data. This page is designed for separates a multi-batch NACHA file into individual files while preserving each selected batch. It performs the supported work locally, so the source does not need to be sent to a conversion service. Use the ACH file splitter with an approved source and a clearly defined expected result.
How do you use the ACH file splitter?
- 1
Prepare input for the ACH file splitter
Start with an ACH file containing two or more parseable batches. Work from a copy, preserve leading zeros and remove unrelated report headings or totals that could be mistaken for transaction data.
- 2
Run and review the ACH file splitter
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.
- 3
Validate before operational use
The expected result is separate downloadable ACH files with new file controls, block counts and padding for each output. Before transmission or downstream import, review the selected batches, output filenames, entry totals, effective dates and validation status of every split file, save the source separately and follow your organization’s approval process.
What common ACH file splitter problems should you check?
The ACH file splitter reports unexpected totals
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.
The file validates but the bank rejects it
Format validation does not verify enrollment or bank policy. splitting can change operational delivery and settlement grouping, so confirm how your bank expects batches submitted. Ask the ODFI for the rejection code and compare it with the company profile, identifiers and processing date.
What belongs on a ACH file splitter review checklist?
- Routing numbers, account numbers and identifiers retain required leading zeros.
- Debit and credit totals, entry counts and addenda counts reconcile.
- Effective dates, SEC codes, service classes and transaction codes are appropriate.
- A second reviewer has checked the selected batches, output filenames, entry totals, effective dates and validation status of every split file before production use.
Frequently asked questions about the ACH file splitter
What does the ACH file splitter do?
It separates a multi-batch NACHA file into individual files while preserving each selected batch. The ACH file splitter processes the data locally in your browser and does not require an account.
What input does this tool need?
It needs an ACH file containing two or more parseable batches. Files remain on your device during processing.
What will I get from the tool?
You will get separate downloadable ACH files with new file controls, block counts and padding for each output. Review the result before using it in an operational workflow.
What should I verify before using the result?
Check the selected batches, output filenames, entry totals, effective dates and validation status of every split file. Also remember that splitting can change operational delivery and settlement grouping, so confirm how your bank expects batches submitted.
Does the ACH file splitter change my original file?
No. Processing creates a separate result in browser memory and leaves the source file unchanged. Keep the original as the audit baseline until the new output has been reviewed and accepted.
Which compatibility checks should I perform first?
Confirm that the files share compatible originator and processing settings, then review the selected batches, output filenames, entry totals, effective dates and validation status of every split file. Do not rely on matching filenames or creation dates alone.
Are control totals updated automatically?
When the tool creates a new ACH output, it rebuilds affected counts, hashes, debit and credit totals, batch controls, file controls, block count and padding from the resulting entries.
What is the safest production workflow?
Preserve the source, review a preview, validate the output and obtain any required approval before transmission. splitting can change operational delivery and settlement grouping, so confirm how your bank expects batches submitted.
Which authoritative sources support this page?
Technical explanations are checked against these primary sources. Bank-specific requirements can be narrower than general format guidance.
- Nacha ACH File Details — Official record-field guidance, including Batch Header SEC codes and addenda capabilities.
- Nacha ACH File Overview — Official explanation of files, batches, entries, controls, and batch grouping.
- Nacha: How ACH Works — Official overview of ACH participants, consumer and corporate payments, and authorization responsibilities.
- Nacha Operating Rules Topics — Current rule changes and implementation topics published by Nacha.
Sources reviewed August 20, 2026. Nacha owns and maintains the linked materials.
What should you know about ACH/NACHA files?
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.