ACHViewer vs Alternatives: Which ACH Tool Fits Your Business?

ACHViewer: A Complete Guide to Features and Setup

What ACHViewer is

• Purpose: Java-based desktop app for viewing, validating, editing and manipulating ACH (Automated Clearing House) files used for electronic funds transfer (EFT).
• Platform: Java runtime — runs on Windows, macOS, Linux.
• License: Open-source / GPL (historical releases).

Key features

• File viewing: Load ACH ASCII files and display file/header/batch/entry structure.
• Validation: Checks ACH formatting rules and basic field-level validation.
• Editing: Edit record fields (record type, entry detail fields, addenda), add or remove batches/entries.
• Reversal: Create reversal entries for returns or corrections.
• Totals & recalculation: Recalculate and update batch totals, entry counts, block counts and hash totals.
• Export: Save back to ACH format; option to write a separate output file.
• Fed file output: Ability to output in Fed-compatible format (where applicable).
• Lightweight GUI: Context menus and right