Costco 856 Converter • Updated October 2025

Costco 856 ASN
to CSV Converter

Convert Costco 856 (ASN) EDI files to CSV instantly. Process Costco ASN data for import into your systems, reconciliation, and compliance verification. PlainEDI extracts all 856 segments into Excel-ready CSV format.

Convert Costco 856 Free

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TL;DR

Convert Costco 856 (ASN) EDI files to CSV instantly. PlainEDI converts Costco 856 files to CSV in seconds—upload your EDI file, preview the first 10 rows free, then export the full CSV for $9 (single file) or $3.90 per file (10-pack). No EDI software required.

Why Convert Costco 856 to CSV?

Import Costco 856 data into your ERP or management system

Verify ASN accuracy before sending to Costco

Reconcile 856 data against other EDI transactions

Track Costco ASN trends and volumes

Audit 856 files for Costco compliance requirements

Costco 856 Tips & Best Practices

Key insights for working with Costco ASN files:

Costco Compliance: Follow Costco's EDI specifications for 856 files

Data Accuracy: Verify all 856 segments match Costco requirements

Timing: Send 856 files according to Costco's expected timelines

Testing: Complete Costco EDI testing before production 856 transmissions

Support: Contact Costco supplier support for 856 questions or issues

Frequently Asked Questions

What 856 data does Costco require?

Costco requires specific 856 (ASN) segments and elements according to their EDI specification. Convert your 856 files to CSV with PlainEDI to verify all required data is present and formatted correctly before sending to Costco.

How do I ensure my Costco 856 files are correct?

Upload your 856 file to PlainEDI for instant validation and CSV preview. Review the extracted data to confirm accuracy, check for missing required fields, and verify compliance with Costco's specifications. Fix any errors before transmitting to Costco.