UlvixorX12 Parser
Parse an X12 file and break down its full structure: delimiters, segments, elements, and the interchange/functional group/transaction set hierarchy. The result is shown as JSON, ideal for inspecting the file or integrating it with other systems.
How it works
- Paste the X12 file you want to parse (or use the built-in 850 purchase order example).
- The parser reads the ISA segment (always 106 characters) to identify the file's own delimiters.
- It walks through the file segment by segment, splitting each one into its elements based on those delimiters.
- Segments are grouped into the standard X12 hierarchy: interchange, functional group, and transaction set.
- The resulting tree is shown as JSON, ready to copy, download, or inspect.
Use cases
- Parse an X12 file from a supplier or customer to understand its contents before building an integration.
- Check which delimiters a specific X12 file uses when they aren't documented.
- Generate an initial mapping between an X12 file's segments and your own system's fields.
- Teach or learn X12's structure with a real example broken down visually.
Use cases
- Parse an X12 file from a supplier or customer to understand its contents before building an integration.
- Check which delimiters a specific X12 file uses when they aren't documented.
- Generate an initial mapping between an X12 file's segments and your own system's fields.
- Teach or learn X12's structure with a real example broken down visually.
Common mistakes
- Thinking "X12" and "EDI" are entirely different formats.X12 is the EDI (Electronic Data Interchange) standard most widely used in North America, maintained by ASC X12. "EDI" is the general concept of exchanging business documents electronically, and X12 is one concrete implementation of it, alongside EDIFACT, more common in Europe.
- Assuming every X12 file uses the same delimiters (*, :, ~).Every file declares its own delimiters in the ISA segment. That's why the parser reads them directly from the file instead of assuming a fixed standard.
- Expecting the parser to understand the business meaning of each element (for example, what the third element of a PO1 segment represents).The parser identifies structure (segments, elements, hierarchy), not the semantic meaning of each code, which depends on the specific implementation guide for a given trading partner or document type.
Frequently asked questions
They're the same tool under a different name: both read an EDI/X12 file and return its structure as JSON. Pick whichever name best describes what you're looking for.
Not in the sense of structural errors — that's what this site's EDI Validator is for. This parser focuses on breaking down structure, not finding errors.
Yes, the parser reads the general segment and delimiter structure, which is the same across X12 versions; it doesn't depend on a specific one.
No, the tool processes one file at a time, pasted into the input panel. If the file contains several concatenated ISA...IEA interchanges, they're all included in the result.
Alternatives
Commercial EDI suites like Cleo or SPS Commerce, or open-source tools like pyx12, offer deeper analysis with per-transaction-type validation. This parser is useful for a quick inspection without installing software.