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View a MTF file online, free

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

Drop your .MTF file here

Opens your .MTF file right here.

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

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

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

An MTF file is a Mortality Table File developed by ARMON Technologies. These data files contain statistical information related to life expectancy and mortality rates. They are typically accessed and viewed using Microsoft Excel.

Programs that open .MTF files

Windows
Dragon UnPACKer, reverse-engineering-darkstone (open-source MTF unpacker)
Linux
reverse-engineering-darkstone (build from source)
.MTF format details
Full nameDarkstone game archive (MTF)
DeveloperDelphine Software (Darkstone, 1999)
First released1999 (Darkstone, an action RPG by Delphine Software)
CategoryText & Code
MIME typeapplication/octet-stream

Related viewers

Every viewer is free to use.

Frequently asked questions

Is my .MTF 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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