What you get for a .DMG 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.
Drop your .DMG file
Choose it or drag it in. It's read right here in your browser.
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.
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 .DMG file?
Plain text that programs, servers and people write every day.
A .DMG file is a Mac OS X Disk Image created by Apple for distributing software and data. These files function as virtual disks that contain compressed data and can be opened on various platforms using utilities such as AnyToISO, PeaZip, TransMac, or HFSExplorer. Specialized tools like DMGConverter and FreeDMG are also used to manage these disk image files.
Programs that open .DMG files
| Full name | Apple Disk Image |
|---|---|
| Developer | Apple |
| First released | 2000s (UDIF disk image, the .dmg format used since Mac OS X) |
| Category | Text & Code |
| MIME type | application/x-apple-diskimage |
| Signature | 6B 6F 6C 79 "koly" - the UDIF trailer, found at the END of the file, not the start |
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Every viewer is free to use.
Frequently asked questions
Is my .DMG 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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