WMZ to PGM Converter

Online WMZ to PGM — instant image conversion

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Works on Any Device

Use any device you prefer — the converter runs in the browser, making WMZ to PGM conversion universally accessible.

Simple Workflow

Three steps: upload WMZ, select PGM, download the result. No technical knowledge required to get started.

Fully Browser-Based

Zero installation. The WMZ to PGM converter lives in the browser — accessible from any machine, any time.

How to convert WMZ to PGM

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose pgm or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your pgm file right afterwards

About formats

WMZ is a compressed variant of the Windows Metafile (WMF) format, introduced by Microsoft with Office 2000 in 1999. A WMZ file is simply a WMF file compressed using the gzip algorithm (RFC 1952), reducing the file size for more efficient storage and embedding within Office documents, web pages, and other containers. The underlying WMF format stores vector graphics as a sequence of GDI (Graphics Device Interface) function calls — commands that draw lines, curves, polygons, text, and bitmaps — recorded in a device-independent format that can be replayed at any resolution. WMZ preserves this vector nature: when decompressed, the file produces a standard WMF that renders through the Windows GDI subsystem using the same drawing primitives as on-screen display, ensuring visual fidelity across different output devices and resolutions. WMZ files are commonly found embedded in Microsoft Office documents (Word, Excel, PowerPoint), HTML email messages generated by Outlook, and web content produced by Office's Save as Web Page feature. The format is also used for clip art and template graphics distributed with Office installations. One advantage is space efficiency: gzip compression typically reduces WMF file sizes by 60-80%, meaningful when many small graphics are embedded in a single document or web page. The format's deep integration with the Microsoft Office ecosystem is another practical strength — WMZ graphics render natively in all Office applications without additional software, and can be extracted, decompressed, and converted using tools like LibreOffice, ImageMagick, Inkscape, and standard gzip utilities.
Developer: Microsoft
Initial release: 1999
PGM (Portable Graymap) is the grayscale member of the Netpbm image format family, created by Jef Poskanzer in 1988 as part of the Pbmplus toolkit for Unix systems. PGM stores single-channel intensity images where each pixel holds a gray value from 0 (black) to a user-specified maximum (typically 255 for 8-bit or 65535 for 16-bit). The format exists in ASCII (magic number P2), where pixel values are written as decimal text numbers separated by whitespace, and binary (magic number P5), where values are stored as raw bytes. Both variants begin with a header specifying the magic number, width, height, and maximum gray value. PGM was designed as the grayscale intermediate in Netpbm's convert-process-convert pipeline philosophy: source images from any format are converted to PGM, processed using Netpbm's extensive command-line tool library, then converted to the target format. One advantage is format transparency — the ASCII variant makes image data directly readable by humans and trivially processable by text tools like awk and grep, invaluable for debugging and education. The scientific and computer vision community's adoption is another strength: PGM's straightforward single-channel representation makes it a natural format for image analysis algorithms, and many academic papers and course materials use PGM examples. The format is supported by ImageMagick, GIMP, and countless image processing libraries, and remains standard input for many research tools and benchmarks.
Developer: Jef Poskanzer
Initial release: 1988

Frequently Asked Questions

Why convert WMZ to PGM?

Converting WMZ to PGM lets you extract vector graphics from Office documents into standard image formats — PGM is widely recognized and easy to share.

How do I open PGM files?

Use GIMP, IrfanView, Netpbm tools to view PGM files. This format enjoys broad software support on all major platforms.

What platforms support this conversion?

Convertio works in any modern browser — Chrome, Firefox, Safari, Edge — on Windows, macOS, Linux, and mobile.

Is my WMZ data kept private?

Convertio deletes uploaded WMZ files immediately after conversion. PGM outputs are automatically purged within 24 hours.

Do I need to install anything?

Nothing to install. The converter operates entirely online in your browser — no plugins, extensions, or software.

What quality can I expect from PGM output?

The PGM format offers grayscale image in Netpbm family — Convertio ensures optimal encoding during the conversion process.