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View a CEL file online, free

Open and read .CEL files online. View source, logs and text with syntax highlighting, search and line numbers, free.

Drop your .CEL file here

Opens your .CEL 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

What you get for a .CEL file

We don't have a dedicated viewer for this format, so we identify and inspect it instead — honestly, only what can be read from the file.

01

Drop your .CEL file

Choose it or drag it in. It's read right here in your browser.

02

We identify it

We read the magic bytes to tell what the file really is, its MIME type, and whether the name matches the contents.

03

See the details

Any metadata we can extract (dimensions, EXIF/GPS, document author and dates), a hex view, plus readable text and strings found inside.

What is a .CEL file?

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

A .CEL file is a Celestia Script File developed by the Celestia Development Team. These executable files are categorized as images and contain instructions used to automate actions within the Celestia software. Users can open and modify these files using Celestia or various text editors such as Notepad, Apple TextEdit, GNU Emacs, and other standard text editing programs.

Programs that open .CEL files

Windows
GenStat, multi-aff-py, RMAExpress
macOS
multi-aff-py
Linux
multi-aff-py
.CEL format details
DeveloperAffymetrix

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Every viewer is free to use.

Frequently asked questions

Is my .CEL 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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