The input is not recognized
Confirm that the selected input really contains an ACH file saved as plain text with standard 94-character records. A renamed extension does not convert a spreadsheet, PDF or binary export into a valid ACH-related source.
ACH file viewer
Open and inspect every batch, entry, addenda and raw NACHA record. Free, no signup, and your file is processed locally in your browser.
Primary topic: ACH file viewer
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Source ACH/NACHA file
What can this ACH file viewer help you do?
The ACH file viewer makes a fixed-width NACHA file readable by organizing its files, batches, entries, addenda and raw records. Use this ACH file viewer as a practical first step, then review its results carefully. view files only on trusted devices and avoid screenshots or shared exports that reveal banking details.
When should you use the ACH file viewer?
A reliable ACH file viewer workflow starts by confirming the business purpose before changing or exporting any data. This page is designed for makes a fixed-width NACHA file readable by organizing its files, batches, entries, addenda and raw records. It performs the supported work locally, so the source does not need to be sent to a conversion service. Use the ACH file viewer with an approved source and a clearly defined expected result.
How do you use the ACH file viewer?
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Prepare input for the ACH file viewer
Start with an ACH file saved as plain text with standard 94-character records. Work from a copy, preserve leading zeros and remove unrelated report headings or totals that could be mistaken for transaction data.
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Run and review the ACH file viewer
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.
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Validate before operational use
The expected result is an on-screen breakdown of headers, controls, entries, amounts, names, routing data and addenda information. Before transmission or downstream import, review the summary totals, batch purpose, SEC code, effective date, entry details and any parser diagnostics, save the source separately and follow your organization’s approval process.
What common ACH file viewer problems should you check?
The ACH file viewer 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. view files only on trusted devices and avoid screenshots or shared exports that reveal banking details. Ask the ODFI for the rejection code and compare it with the company profile, identifiers and processing date.
What belongs on a ACH file viewer 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 summary totals, batch purpose, SEC code, effective date, entry details and any parser diagnostics before production use.
Frequently asked questions about the ACH file viewer
What does the ACH file viewer do?
It makes a fixed-width NACHA file readable by organizing its files, batches, entries, addenda and raw records. The ACH file viewer processes the data locally in your browser and does not require an account.
What input does this tool need?
It needs an ACH file saved as plain text with standard 94-character records. Files remain on your device during processing.
What will I get from the tool?
You will get an on-screen breakdown of headers, controls, entries, amounts, names, routing data and addenda information. Review the result before using it in an operational workflow.
What should I verify before using the result?
Check the summary totals, batch purpose, SEC code, effective date, entry details and any parser diagnostics. Also remember that view files only on trusted devices and avoid screenshots or shared exports that reveal banking details.
Can the ACH file viewer read a partially invalid file?
It can report many record-level problems when the file remains parseable. Severely truncated, binary or incorrectly encoded input may need to be exported again before reliable analysis is possible.
What is the difference between an error and a warning?
An error identifies a structural or arithmetic problem likely to require correction. A warning calls attention to unusual or bank-dependent data that needs human review but may still be accepted.
Does a clean result mean the payments are authorized?
No. Structural checks cannot confirm receiver authorization, account ownership, available funds, processing deadlines or the terms of your agreement with the financial institution.
What should I retain after reviewing the file?
Retain the source file according to your security policy and document the review outcome. Focus on the summary totals, batch purpose, SEC code, effective date, entry details and any parser diagnostics, along with any operational decisions made from the report.
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.