WMZ to RGBO Converter

Transform WMZ into RGBO images — quick and online

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Fully Browser-Based

Browser-only workflow — visit the page, upload WMZ, download RGBO. Works in Chrome, Firefox, Safari, and Edge.

Quality Output

Output quality matters. The converter produces well-encoded RGBO files that maintain the integrity of your source WMZ data.

Batch Processing

Handle multiple WMZ files in a single session. Every file converts to RGBO independently for organized output.

How to convert WMZ to RGBO

1

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

2

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

3

Let the file convert and you can download your rgbo 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
RGBO is a raw pixel data format designation used by ImageMagick, the open-source image processing suite first released in 1990, representing images as a flat sequence of Red, Green, Blue, and Opacity (inverted alpha) sample values with no header, container, or compression. The RGBO channel ordering specifies that the fourth channel is opacity rather than alpha — where alpha represents transparency (0 = transparent, max = opaque), opacity represents the inverse (0 = opaque, max = transparent). This distinction matters in compositing pipelines where the mathematical convention for the fourth channel varies between systems: some compositing models work with alpha (transparency), while older conventions including portions of ImageMagick's internal processing historically used opacity. RGBO files contain raw sample data at a user-specified bit depth (8-bit, 16-bit, or floating-point per channel), with pixels stored in scanline order. Because there is no header, the image dimensions, bit depth, and endianness must be specified externally when reading the file — typically via ImageMagick command-line arguments. One advantage is direct compatibility with processing pipelines that use the opacity convention: RGBO eliminates the need for channel inversion when interfacing with systems that expect opacity rather than alpha, preventing subtle compositing errors that occur when transparency conventions are mixed. The format's raw-data nature provides another practical benefit — with no encoding overhead, RGBO data can be memory-mapped, processed with SIMD instructions, or piped between processes with minimal latency. RGBO is primarily used within ImageMagick processing chains and can be converted to any other format using ImageMagick's extensive format support.
Initial release: 1990

Frequently Asked Questions

Why convert WMZ to RGBO?

The WMZ format has limited viewer support. Converting to RGBO ensures broad compatibility across devices.

How do I open RGBO files?

You can open RGBO with GIMP, ImageMagick, SGI tools. No specialized software is needed on most modern systems.

Is my WMZ data kept private?

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

How long does WMZ to RGBO conversion take?

Conversion is fast — usually a matter of seconds. Complex or large WMZ files may need slightly more time.

Can I convert multiple WMZ files at once?

Upload as many WMZ files as you need. Every file processes independently and delivers its own RGBO output.

Is WMZ to RGBO conversion accurate?

Accuracy is a priority. The WMZ data is carefully decoded and re-encoded as RGBO to maintain faithful output.