X12 856 — Advance Ship Notice

Convert X12 856 Advance Ship Notice to CSV

Turn a raw 856 ASN file into a spreadsheet-ready CSV — carrier details, tracking numbers, and shipped quantities per line item. Runs entirely in your browser.

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What Is an X12 856 File?

The 856 (Advance Ship Notice, or ASN) is the ANSI X12 transaction set a supplier sends before or when a shipment leaves their facility, telling the buyer exactly what was shipped, how, and when to expect it. It includes carrier and tracking information, packaging hierarchy (shipment → order → pack → item), and the specific quantities of each item included — letting receiving warehouses prepare in advance and verify deliveries against what was promised.

Read the Full Guide: Why Convert 856 Files, Key Segments, and More

Why Convert an 856 to CSV?

Warehouse and receiving teams use ASN data to pre-stage inbound shipments and reconcile received quantities against what was shipped. CSV format makes it trivial to import ASN line items into a warehouse management system, cross-reference tracking numbers in a spreadsheet, or flag discrepancies between shipped and received quantities using a simple formula.

Key Segments You'll See in an 856 Export

  • BSN — Beginning Segment for Ship Notice: shipment ID and date.
  • HL — Hierarchical Level: defines the shipment/order/pack/item structure.
  • TD1 / TD5 — Carrier Details: transport method and carrier identification.
  • REF — Reference Numbers: often includes carrier tracking numbers (PRO/BOL numbers).
  • LIN / SN1 — Item Identification and Shipped Quantity per line item.

Also Known As

People also search for this as an "X-12 856 to CSV converter," "ASN edi csv convertor," or "856 edi file won't open" — all land on the same structural parser here.

Related Pages

Looking for the purchase order that triggered this shipment? See 850 to CSV or 850 to Excel. Need the follow-up invoice? See 810 to CSV. For general background, read What Is an EDI File?.

Frequently Asked Questions

What information does an 856 ASN carry that an 850 doesn't?

Shipping-specific data: carrier, tracking numbers, packaging hierarchy, and actual shipped quantities — versus the 850's ordered quantities.

Can I extract tracking numbers from the export?

Yes — REF segments, which commonly carry tracking/PRO/BOL numbers, are parsed and labeled like every other segment.

Is my ASN file uploaded anywhere?

No. Parsing happens entirely in your browser; the file is never transmitted to a server.

Is this a subscription?

No — a one-time payment (currently 50% off at $29.99) unlocks unlimited full-file exports, with no recurring fees.

Does this support both 4010 and 5010 versions, and can I batch-convert multiple files?

Yes on versions — the parser reads structurally from the file's own delimiters, so 4010, 5010, and other X12 versions of the 856 all work. It currently processes one file at a time; there's no bulk/batch upload feature yet. It runs on any device with a modern browser, including Mac and Chromebook.