Windows Metafile (WMF) is a vector and raster graphics format used by Microsoft Office for clip art and simple illustrations.
JPEG Network Graphics (JNG) is a hybrid format using JPEG-compressed image data with optional PNG-compressed alpha channel.
Reach for WMF when your priority is office documents, legacy vector graphics — its uncompromising quality ensures every detail is preserved.
Reach for JNG when your priority is legacy web animation, lossy image sequences — its efficient compression makes sharing fast and storage minimal.
Learn more about WMF and JNG formats in our detailed guide.
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WMF (WMF vectors) - Windows Metafile, vector format for Microsoft Office clip art. Best for office documents, legacy vector graphics.
JNG (JNG images) - JPEG Network Graphics, JPEG-based lossy animation format. Ideal for legacy web animation, lossy image sequences.
Yes, GoConvertFile offers free conversion of WMF to JNG for files up to 100MB. No registration required.
Most WMF to JNG conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
JNG is ideal for legacy web animation, lossy image sequences. JPEG Network Graphics, JPEG-based lossy animation format
Yes, converting WMF to JNG uses lossy compression, which reduces file size by discarding some visual data. Set quality to 85-95% for a good balance of quality and file size.
JNG files are typically 50-80% smaller than WMF files because JNG uses efficient lossy compression. The exact reduction depends on quality settings.
No, JNG does not support transparency. Any transparent areas in your WMF will be filled with a solid color (usually white) during conversion. Use PNG or WebP if transparency is needed.