How to open a code or text file online
Three steps, a few seconds, no software.
Open your .CMD file
Drop it on the box, choose it from your device, or paste the text straight in.
View it instantly
Your .CMD file opens neatly formatted with line numbers.
Search, copy or download
Search the text, jump to any line, then copy what you need or download a clean copy.
What is a .CMD file?
Plain text that programs, servers and people write every day.
A CMD file is a plain-text Windows command script that runs automatically when you double-click it. To read what it does without running it, right-click and choose Edit, which opens it in Notepad. Never double-click a CMD file from an untrusted source; it executes immediately and is a common malware delivery format.
Programs that open .CMD files
| Full name | Windows NT Command Script |
|---|---|
| Developer | Microsoft |
| First released | 1993 with Windows NT 3.1 / OS/2 as the NT-era sibling of the DOS .bat extension |
| Category | Text & Code |
| MIME type | application/x-cmd |
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Frequently asked questions
Is my .CMD file uploaded anywhere?
No. The file is read and highlighted for you.
Why do some characters look wrong (é, ł)?
That usually means the file was saved in one encoding and opened in another. We detect UTF-8, UTF-16 and the Windows-1250/1252 code pages automatically and show which one was used.
Can it handle huge log files?
Yes, up to 50 MB. Only the lines on screen are drawn, so scrolling stays smooth. Syntax colours are switched off for files over 1.5 MB to keep things fast.
How do the log level filters work?
We find levels like ERROR, WARN, INFO and DEBUG on each line. Lines without a level, such as stack traces, stay with the entry above them, so filtering to errors keeps the full trace.
Can I edit the file?
This is a viewer. To change code, download it or copy it into your editor. Converting encodings and line endings is planned.
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