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Open a SUN file online, free

Open .SUN files online, free. Nothing to install.

Drop your .SUN file here

Opens your .SUN file right here.

Choose file
Up to 50 MB · 160+ text and code extensions
Instant. Opens in seconds
No sign-up. Just open it
100% free. No limits on use

How to open a code or text file online

Three steps, a few seconds, no software.

01

Open your .SUN file

Drop it on the box, choose it from your device, or paste the text straight in.

02

View it instantly

Your .SUN file opens neatly formatted with line numbers.

03

Search, copy or download

Search the text, jump to any line, then copy what you need or download a clean copy.

What is a .SUN file?

Plain text that programs, servers and people write every day.

A .SUN file is a Sun Raster Graphic File, which is a type of raster image developed by Sun Microsystems. These files contain bitmap data and were originally used within the Sun operating system. They can be opened and viewed using image editing and viewing software such as GIMP, XnView, IrfanView, and PMView Pro.

Programs that open .SUN files

Windows
XnView, GIMP, IrfanView, PMView Pro
macOS
XnView, GIMP
Linux
XnView, GIMP, Sun operating system
.SUN format details
DeveloperSun Microsystems

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Frequently asked questions

Is my .SUN 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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