CGM viewer online

Safe & Secure Platform to read CGM Files

🔒 Your data stays safe on your device, and previews happen in your web browser

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Multi-Platform Support

platforms

You can use our reader on all major operating systems with a stable internet connection.

Why choose our Free Online CGM Viewer?

No installation, no hassle

View .CGM (Computer Graphics Metafile) drawings directly in your browser — no CAD apps, no plugins, no software setup. Upload your CGM file and preview it instantly, without installing specialized engineering tools.

Works everywhere

Whether you're on Windows, macOS, Linux, or using a Chromebook — if your device has a modern browser, it can display CGM files. Access and review technical drawings even from mobile devices without any CAD software installed.

Instant engineering graphics preview

Drag & drop your CGM graphic and get a clean, scalable preview within seconds. Our viewer renders diagrams, technical illustrations, and aerospace/industrial drawings with precision — right in your browser.

Simple, even for non-technical users

No CAD expertise required. Just upload — preview — view. Perfect for engineers, managers, QA staff, documentation teams, and anyone who needs to review CGM graphics quickly and easily without learning complex tools.

High-quality rendering & export options

Enjoy accurate linework, text, and vector graphics without distortion. Need to share or archive? Convert CGM to PDF or image formats and download your result for easy viewing, printing, or documentation workflows.

FAQ ▼

What is a CGM file?

A CGM (Computer Graphics Metafile) is a vector and raster graphics format used in technical docs, CAD/CAE, aerospace, and manuals. It can store lines, fills, text, and images with precise geometry. Variants include WebCGM and industry profiles (e.g., ATA GREXCHANGE). CGM is built for interchange and print fidelity rather than casual editing.

How do I open a CGM file online?

Go to the Coolutils online CGM viewer, upload your CGM, and click "View." You’ll get an instant preview in your browser—no plugins or CAD software required. Works on Windows, macOS, Linux, and mobile. Large technical drawings render with zoom and pan so you can inspect fine details without installing anything.

Can I convert CGM to PDF or images?

Yes. With Coolutils you can convert CGM to PDF, SVG, PNG, or TIFF for sharing or publishing. Upload the CGM, choose the output, set options like DPI, page size, background color, or scaling, and download the result. Converting to PDF preserves layout; SVG keeps vector data for crisp zooming on the web.

Is Coolutils CGM Viewer secure?

Yes. Files are transferred via HTTPS and processed only for your session; uploads are automatically deleted within 24 hours. We never share your documents with third parties. For highly sensitive content, Coolutils also offers offline converters so you can process CGM files entirely on your own machines.

Convert from CGM

Using CoolUtils, it is possible to convert CGM files to a variety of other formats:

CGM to PDF

CGM to JPG

CGM to HPGL