WMF to SK1 Converter

WMF to SK1 — sK1 vector format, free conversion

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Cross-Platform Vectors

Move from Windows-only WMF to SK1 — editable in the cross-platform sK1 illustration application.

Instant Access

No account needed. Visit the page and convert WMF to SK1 immediately — no login, no verification.

Auto-Delete Protection

WMF files are deleted right after conversion. SK1 output is removed from Convertio servers within 24 hours.

How to convert WMF to SK1

1

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

2

Choose sk1 or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your sk1 file right afterwards

About formats

WMF (Windows Metafile) is a vector graphics format created by Microsoft, introduced with Windows 3.0 in May 1990 as the platform's native format for recording and replaying graphical operations. A WMF file captures a sequence of GDI (Graphics Device Interface) drawing commands — lines, rectangles, ellipses, polygons, text, and bitmap blits — in the order they were issued, serializing screen or printer output into a replayable file. The format uses a 16-bit coordinate space and organizes records as a linear stream of function calls with their parameters, preceded by a header specifying the bounding rectangle and resolution. WMF became deeply integrated into the Windows ecosystem as the default format for clip art collections, Office document graphics, and clipboard vector interchange during the 1990s — Microsoft Office shipped with thousands of WMF clip art images that defined a visual era of desktop publishing. One advantage is pervasive compatibility: virtually every Windows application from the past three decades can render WMF content, making it one of the most widely supported vector formats in existence. The lightweight recording model is another strength — WMF files are compact and render quickly because they replay native system drawing calls rather than interpreting a complex graphics language. While 16-bit limitations and lack of transparency and Bezier curves led Microsoft to develop EMF as a 32-bit replacement, WMF files remain ubiquitous in legacy documents and across current Windows software.
Developer: Microsoft
Initial release: May 22, 1990
SK1 is the native file format of the sK1 project, an open-source vector graphics editor and conversion engine started by Igor Novikov in 2003 as a successor to Bernhard Herzog's Skencil. The format evolved from the original SK format, extending its capabilities while maintaining the text-based, Python-readable syntax for describing vector documents. SK1 files encode complete document structures including multiple pages, layers, guidelines, and a full hierarchy of graphic objects — Bezier paths, rectangles, circles, polygons, text blocks, and embedded raster images — with attributes for fills (solid, gradient, pattern, hatching), strokes, and transformations. The sK1 project distinguished itself by focusing on prepress and professional print production features, adding CMYK color management, ICC color profiles, spot color support, and PDF/PostScript output — capabilities unusual in open-source vector editors. One advantage is professional color handling — sK1's CMYK workflows and color management make it one of the few open-source tools suitable for print-ready vector production. The project's companion tool, UniConvertor, leverages the SK1 format as an intermediate representation for converting between numerous vector formats (CDR, CMX, WMF, EMF, SVG, and others), giving SK1 significance beyond the editor itself as a universal interchange format. The text-based file structure preserves the readability and scriptability advantages inherited from Skencil's original SK format.
Initial release: 2003

Frequently Asked Questions

Why convert WMF to SK1?

SK1 is the format used by sK1, an open-source illustration editor. Converting WMF to SK1 lets you edit legacy vector graphics in this cross-platform tool.

What program opens SK1 files?

The sK1 illustration application is the primary tool. UniConvertor and some other open-source vector utilities also handle SK1.

Is the vector data preserved?

Convertio translates WMF vector paths and shapes into SK1 format, preserving the geometric structure of your artwork.

Does this work without registration?

No registration needed. Open the page, upload your WMF file, and download the SK1 result immediately.

Is WMF to SK1 conversion free?

Free for standard use. Upgraded plans extend capacity for professional-volume workflows.

Can I use this on mobile?

Yes — Convertio is fully responsive and works in any mobile browser without needing an app.