How to open a code or text file online
Three steps, a few seconds, no software.
Open your .PHO file
Drop it on the box, choose it from your device, or paste the text straight in.
View it instantly
Your .PHO 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 .PHO file?
Plain text that programs, servers and people write every day.
A .PHO file is a Gerber Photoplot data file developed by Ucamco for use in computer-aided design. It contains instructions for manufacturing printed circuit boards and is categorized as a CAD file. These files are typically opened using software such as ViewMate or Altium Designer.
Programs that open .PHO files
| Full name | Gerber Photoplot File |
|---|---|
| Developer | Gerber Systems Corp. (now Ucamco — format maintainer) |
| First released | 1960s (original Gerber format); RS-274X extended format 1991 |
| Category | Tools |
| MIME type | application/octet-stream |
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Frequently asked questions
Is my .PHO 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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