.edi · .x12 · .dat · .txt

How to Open an EDI File and Actually Read It

You double-clicked an .edi file and got a wall of unreadable text in Notepad. Here's why that happens, and how to open it properly — right below, in your browser, free.

Drag & drop your EDI file here

Up to 50MB — parsed entirely in your browser

Never uploaded, no account needed Exports to CSV, Excel, JSON & XML

or try it instantly — Try With a Sample File, no upload needed:

No file parsed yet — upload an EDI file or load a sample above to see results here.

Why Won't My EDI File Open Properly?

An EDI file (.edi, .x12, .dat, or sometimes a plain .txt extension) is a plain-text file, so any text editor will technically "open" it. The problem is that Notepad, TextEdit, or a code editor has no idea that the string of characters after each * or + means something specific — they just show you raw bytes as one long unbroken line (or a handful of very long lines). You need software that understands the EDI standard's structure to translate that raw text into something readable.

Read the Full Guide: Three Ways to Open a File, Extensions, and More

Three Ways to Open an EDI File

1. A Free Browser-Based Viewer (This Page)

Drop the file into the box above. It's parsed instantly, entirely inside your browser tab using JavaScript — nothing is uploaded to any server, no account or installation is required, and it works whether your file is ANSI X12 or UN/EDIFACT. This is the fastest option for a one-off "what does this file actually say" check, which is why it exists as a free tool rather than a locked feature.

2. Dedicated Desktop EDI Software

Enterprise EDI translators (used for automated, ongoing trading-partner integrations) can open and map EDI files, but they're built for continuous production pipelines, not casual inspection — they typically require licensing, installation, and configuration of trading-partner profiles before you can view a single file. If you just need to read one file today, this is usually overkill.

3. A Text Editor, With Manual Reformatting

You can open the file in any text editor and manually use "Find & Replace" to turn segment terminators (e.g. ~ or ') into line breaks, which at least puts one segment per line. This gets you readable line breaks but no segment labels, no delimiter detection, and no way to export the result — it's a manual workaround, not a real solution.

Common File Extensions You Might See

  • .edi — the most common generic EDI file extension, used for both X12 and EDIFACT.
  • .x12 — explicitly denotes an ANSI X12 file.
  • .dat — a generic data extension sometimes used by trading partners for EDI exports.
  • .edifact — explicitly denotes a UN/EDIFACT file.
  • .txt — plain text; some systems export EDI content with this generic extension, which offers no hint about the standard inside — this tool auto-detects the standard from the file's own header regardless of its extension.

What Happens After You Open the File Here

Once parsed, you can search and filter the segments, preview a sample of the parsed rows for free, and export the full structured result to CSV, Excel, or JSON. If you specifically want the ANSI X12 or EDIFACT-only view with format-specific explanations, see the dedicated X12 EDI Viewer or EDIFACT Viewer pages.

Related Guides

For background on what these files represent, see What Is an EDI File? and EDI Delimiters Explained.

Frequently Asked Questions

What program opens .edi files?

Any text editor will technically open the file, but it will look like unreadable raw text. A dedicated EDI viewer like this one parses the structure and labels each segment.

Do I need to know if my file is X12 or EDIFACT before opening it?

No — this tool auto-detects the standard from the file's own header (ISA for X12, UNA/UNB for EDIFACT) regardless of the file extension.

Is my file uploaded anywhere when I open it here?

No. All parsing happens locally in your browser using JavaScript. The file is never transmitted anywhere.

Can I open a .txt file that actually contains EDI data?

Yes — the file extension is accepted regardless (.txt, .edi, .x12, .dat, .edifact); the tool detects the standard from the file's content, not its name.

My EDI file won't open, or looks like garbled symbols — what's wrong?

If a text editor shows one dense unbroken line, or Excel's import wizard produces garbled/misaligned columns, that's normal for raw EDI — those tools don't know the file's delimiters. Upload the file above instead; this viewer reads the delimiters directly from the file's own header, so "won't open" and "can't read edi file" issues are almost always solved by using a parser like this rather than a generic text or spreadsheet app.

Does this work on Mac, iPhone, or Chromebook?

Yes — it runs in any modern browser on Windows, Mac, Chromebook, or iPad, with no software to install. It currently opens one file at a time; there's no bulk/batch upload feature yet.