01Read an X12 stream
X12 document formatter and viewer
Turn a compact X12 interchange into a segment-by-segment view. The formatter reads delimiters from the fixed-length ISA header when possible and leaves your source text unchanged.
Results, checks, and export controls will appear in this panel.
01 / Method
How to use this tool
- 01
Paste X12 text or choose a local text file.
- 02
Select Format X12 to inspect one segment per line.
- 03
Review the detected separators and warnings before copying or downloading the result.
02 / Useful for
Common use cases
- Inspecting an 850 purchase order during mapping work
- Making a compact 837 or 835 easier to review
- Locating envelope, loop, and transaction boundaries
03 / Boundaries
Assumptions & limitations
Assumptions
- The interchange begins with an ISA segment or uses consistent separators.
- Formatting changes presentation only; it does not validate an implementation guide.
Limitations
- Malformed or truncated ISA headers can make delimiter detection uncertain.
- The viewer does not apply partner-specific implementation guides or code-list rules.
04 / FAQ
Questions about x12 formatter
Does formatting change my EDI?
No. The source field is preserved. The result adds line breaks and optional segment numbers for display.
Is my X12 file uploaded?
No. Parsing, formatting, copying, and download preparation happen in this browser tab.
Can it format HIPAA transactions?
It can format the X12 syntax used by HIPAA transactions, but it does not determine HIPAA compliance.
05 / Continue