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Welcome to FISTWorks

Validate, draft, and automate NACHA-compliant ACH files — so your payments process without rejection.

Our Tools

ACH validation, file drafting, and a REST API — everything your team needs to process payments confidently.

ACH Validator

Validate ACH files quickly and accurately. Catch formatting errors, verify routing numbers, and ensure compliance before submission.

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ACH Drafting Tools

Save your banks, recipients, and account details once — then generate NACHA-compliant ACH files in minutes.

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ACH Validation API

Integrate ACH file validation into your applications with a REST API. Submit files, get NACHA compliance results as JSON.

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Ready to validate your first ACH file?

Create a free account and validate up to 3 ACH files per month — no credit card required.

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