WMZ to WEBP Converter

Convert WMZ to WEBP online — fast image conversion

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Quality Output

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

Fully Browser-Based

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

Works on Any Device

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

How to convert WMZ to WEBP

1

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

2

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

3

Let the file convert and you can download your webp 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
WebP is an image format developed by Google, announced on September 30, 2010, designed to provide superior compression for web images in both lossy and lossless modes. The lossy mode is derived from the VP8 video codec's intra-frame coding (the same technology used in WebM video), applying block prediction, transform coding, and adaptive quantization to photographic content. The lossless mode uses a distinct algorithm combining predictive coding, color space transforms, backward reference to repeated pixel patterns, and entropy coding. WebP also supports alpha transparency in both modes — lossy WebP with transparency is unique among common web formats, offering semi-transparent images at much smaller sizes than PNG. The format supports animated sequences as well, providing a modern alternative to GIF with full-color support and dramatically better compression. One advantage is substantial file size reduction — lossy WebP produces images 25-35% smaller than JPEG at equivalent visual quality, and lossless WebP is typically 26% smaller than PNG, directly improving web page loading speed and reducing bandwidth costs. Universal browser support provides another key strength: Chrome, Firefox, Safari, Edge, and all mobile browsers now render WebP natively, achieving the broad adoption threshold needed for practical deployment. Google's core web infrastructure (Search, YouTube thumbnails, Gmail) uses WebP extensively, and the format is supported by major CDN platforms, CMS systems, and image processing services. WebP has established itself as the primary modern alternative to JPEG and PNG for web content.
Developer: Google
Initial release: September 30, 2010

Frequently Asked Questions

Why convert WMZ to WEBP?

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

How do I open WEBP files?

Chrome, Firefox, Edge, Safari, and modern image viewers will handle WEBP files without issues. The format is well-supported across platforms.

Can I convert multiple WMZ files at once?

Batch conversion is supported — upload several WMZ files and each will be independently converted to WEBP format.

What happens to my file after conversion?

Your uploaded WMZ file and the resulting WEBP output are automatically deleted from the server within 24 hours to protect your data.

What quality can I expect from WEBP output?

Expect solid results — WEBP delivers superior compression for web delivery, and the converter maximizes output fidelity.

Does the conversion happen on my device?

No — conversion runs on Convertio servers. Your device handles only the upload and download, not the processing.