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View a KDZ file online, free

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

Drop your .KDZ file here

Opens your .KDZ file right here.

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Up to 50 MB · 160+ text and code extensions
Instant. Opens in seconds
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100% free. No limits on use

What you get for a .KDZ 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 .KDZ 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 .KDZ file?

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

A .KDZ file is a data file used by Kaspersky Labs software. It contains virus definition bases that allow security programs to identify and mitigate threats. These files are typically opened and processed by Kaspersky Anti-Virus.

Programs that open .KDZ files

Windows
KDZTool, LG Firmware Extract Tool, LG Flash Tool (LGUP legacy), LGUP
Linux
kdztools (Python)
.KDZ format details
Full nameLG Android Firmware Package
DeveloperLG Electronics
First releasedc. 2011 (LG Android smartphone era)
CategoryText & Code
MIME typeapplication/octet-stream
Signature28 05 00 00 34 12 78 56 0x28050000 header size + 0x12345678 magic signature

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Every viewer is free to use.

Frequently asked questions

Is my .KDZ 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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