How to open a code or text file online
Three steps, a few seconds, no software.
Open your .CONF file
Drop it on the box, choose it from your device, or paste the text straight in.
View it instantly
Your .CONF 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 .CONF file?
Plain text that programs, servers and people write every day.
A CONF file stores settings that control how a program or system service behaves. It is the Unix/Linux counterpart of a .cfg or .ini file. Almost every .conf file is plain text, so open it with Notepad++, VS Code, or Notepad on Windows, TextEdit (plain-text mode) on Mac, or nano/vim on Linux. Never use a word processor, and always back up the file before editing, because a single typo can prevent a web server or SSH service from starting.
Programs that open .CONF files
| Full name | Configuration File |
|---|---|
| Developer | N/A (generic Unix/Linux convention used by many applications) |
| First released | No single origin — a long-standing Unix/Linux convention for service and app config files |
| Category | Text & Code |
| MIME type | text/plain |
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Frequently asked questions
Is my .CONF 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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