Free online SDA to WEBP converter

Older StarOffice Draw files may need conversion when a website or image viewer accepts WEBP but cannot open SDA. Converting the drawing to WEBP makes it easier to share as an image, but the result is rasterized rather than editable as a vector drawing.

What the SDA format is

SDA is the legacy StarDraw drawing format used by StarOffice Draw, a vector drawing application. You may encounter SDA files in archives created with older StarOffice versions; LibreOffice Draw can open many such files.

What the WEBP format is

WEBP is an image format for web use. It supports lossy and lossless compression and can preserve transparency. Unlike an SDA drawing, a WEBP file stores a raster image, so its shapes and text are no longer independently editable.

How to convert SDA to WEBP

Online on 101convert.com

1. Upload the SDA file on the converter page. Multiple files can be added for batch conversion; the page shows the per-file size limit.
2. Before converting, adjust any needed options: pages, resolution, quality, image size, max width, max height, auto orient, or strip metadata.
3. Start the conversion and download the WEBP file or files.

The conversion runs on the server with LibreOffice, then ImageMagick.

Offline with desktop software

LibreOffice Draw, available for Windows, macOS, and Linux, can open the SDA drawing and export it to PDF. Open the file, then choose File → Export As → Export as PDF. For a command-line PDF export, run soffice --headless --convert-to pdf --outdir . drawing.sda.

Use ImageMagick to render the PDF page to WEBP. For example, to render the first page at 150 dpi with lossy quality set to 85, run magick -density 150 "drawing.pdf[0]" -quality 85 drawing.webp. PDF reading may require Ghostscript, and ImageMagick's security policy may block PDF input; enable PDF processing only if permitted by your system administrator.

Quality and compatibility

Resolution controls the pixel dimensions and sharpness of the rasterized drawing; increase it for fine lines or text, then set a maximum width or height if the image must fit a display. WEBP quality affects lossy output, while a lossless setting avoids additional compression loss but can produce larger files. Keep the SDA or an exported PDF if you need to edit the original drawing later.