View and export
CAD drawings on Windows
CAD Explorer adds native DWG and DXF support to Windows Explorer — thumbnails and previews — plus a dedicated app for viewing, zooming, inspecting document properties, and exporting your drawings to images, PDF, and SVG.
Installation
CAD Explorer is distributed through the Microsoft Store as a single package that installs both the desktop app and the Windows Explorer shell extensions.
No configuration needed. After installation, DWG and DXF thumbnails and the preview pane work automatically in Windows Explorer. Just navigate to a folder containing CAD files.
What gets installed
CAD Explorer App
A desktop app for opening, viewing, and exporting DWG and DXF files. Accessible from the Start menu.
Shell Extensions
Background components that power thumbnails and the preview pane in Windows Explorer. These run automatically — no action needed.
The Interface
CAD Explorer has a simple left-hand navigation. You can open a drawing by clicking Open a CAD file, dragging a file onto the window, or launching it from Windows Explorer.
Opening a file is required before the CAD document, Properties, and Export pages become usable. The Home page always offers an Open a CAD file button to get started.
Opening a file
There are three ways to open a drawing in the app:
- Click Open a CAD file on the Home or CAD document page and pick a
.dwgor.dxffile from the browser dialog. - Drag and drop a CAD file from Windows Explorer directly onto the CAD Explorer window.
- In Windows Explorer, right-click a DWG or DXF file and choose Open with → CAD Explorer. The app opens and goes straight to the CAD document page.
Single instance: CAD Explorer runs as a single window. If you open it from Explorer while it's already open, the existing window is brought to the front and the new drawing is loaded — you won't get a second window.
Windows Explorer Integration
Once CAD Explorer is installed, Windows Explorer gains two new capabilities for DWG and DXF files — no extra steps required.
Thumbnails
DWG and DXF files display their actual drawing content as a thumbnail in Explorer's icon view, so you can recognise a drawing without opening it.
Preview Pane
Select a CAD file and press Alt+P (or use View → Preview Pane) to see a live, zoomable preview directly inside Explorer — no app launch needed.
Reset Thumbnails
If thumbnails ever look stale after changing settings, a single button in Settings refreshes Explorer's thumbnail cache.
Using the Preview Pane
The preview pane renders your drawing at full quality. Here's what you can do inside it:
| Action | How |
|---|---|
| Zoom in / out | Hold Ctrl and scroll the mouse wheel |
| Scroll the drawing | Use the scroll bar or scroll the mouse wheel |
| Fit the whole drawing | Right-click the preview and choose Zoom to Extents |
| Change background | Right-click the preview for a list of background colours |
Model space opens framed on the drawing's saved view, the area and zoom it was last saved showing, so it looks the way you left it rather than zoomed all the way out. Use Zoom to Extents from the right-click menu to see the whole drawing instead.
Layouts & preview image in the pane
When a drawing has more than one layout, the preview pane shows them as tabs across the top. A drawing with many layouts collapses those tabs into a compact dropdown so the names stay readable. Click it to pick a layout.
If the drawing carries an embedded preview image, a Preview tab is added at the end that shows it, the same as in the app. For a 3D drawing whose layout renders blank, the pane falls back to that saved image automatically, so the preview isn't empty.
How thumbnails are produced
You control how DWG and DXF thumbnails are generated in Settings. Many DWG files contain an embedded thumbnail saved by the authoring application — using it is much faster than rendering the drawing, so the default mode prefers it and falls back to rendering when none is present.
Faster browsing of large folders: if you mostly care about speed, set the DWG thumbnail mode to Only get thumbnail if available. For the most accurate previews, choose Render default layout instead.
Viewing Drawings
The CAD document page is CAD Explorer's main viewer. It renders your drawing with high-fidelity vector graphics and lets you zoom and inspect it in detail. By default a drawing opens framed on its saved view, the area and zoom it was last saved showing.
Zoom & fit
Use the Zoom dropdown at the top of the page to jump to a preset zoom level, or type a custom percentage. While looking at the drawing, hold Ctrl and scroll the mouse wheel to zoom smoothly — a small indicator shows the current zoom level.
A Saved view toggle and three fit buttons at the top of the page frame the drawing instantly:
| Button | What it does |
|---|---|
| Saved view | Frames model space on the view the drawing was saved showing (the default). Turn it off to fit to extents. See below. |
| Fit | Scales the whole drawing to fit inside the window |
| Fit width | Scales so the drawing's width fills the window |
| Fit height | Scales so the drawing's height fills the window |
Saved view
Every drawing remembers the view it was last saved showing — the exact area and zoom. CAD Explorer frames model space on that saved view by default, so a drawing opens looking the way you left it, the same as it would in AutoCAD. This also avoids the "zoomed all the way out" look a drawing can get when a stray object sits far from everything else, which would otherwise pull a fit-to-window view very wide.
The Saved view toggle sits with the fit buttons. Turn it off, or click any fit button, to frame the whole drawing instead. It applies to model space only, and is available only when the drawing carries a saved view — paper-space layouts always fit their sheet, and drawings without a saved view fit to the window.
Whether new drawings open on their saved view or fit to the window is controlled in Settings.
Layouts
A CAD drawing can contain a model space plus one or more paper-space layouts. CAD Explorer lists the available layouts so you can switch between them — handy for drawings with several sheets. A minimal DXF that only contains model-space geometry shows a single Model entry.
Preview image tab
Many drawings carry an embedded preview image, the picture the authoring application saved with the file. When one is present, CAD Explorer adds a Preview tab next to the layouts that shows it. This is especially handy for 3D drawings whose layouts render little or nothing (see Limitations), so you can still see what the drawing looks like. The Preview tab zooms and pans with the same fit, zoom, and scroll controls as a layout.
Background & transparency
Use the Transparency colour control to set the background shown behind the drawing, including a fully transparent option. Your choice is remembered the next time you open the app and is also used as the fill when you export to a format that doesn't keep transparency.
CAD drawings are vector data, so you can zoom to any level without quality loss. If a layout contains nothing CAD Explorer can draw, the viewer shows a "No renderable 2D geometry to display" message — try another layout (see Limitations).
Document Properties
The Properties page inside the app shows information about the open drawing — both file facts and the metadata stored inside the CAD file.
| Property | Description |
|---|---|
| Name | The drawing's file name |
| Format | DWG or DXF (and the detected version where available) |
| Folder | Where the file is stored |
| Size | File size on disk |
| File modified | Last time the file changed on disk |
Drawings authored in AutoCAD-compatible tools often carry summary information such as title, author, subject, and keywords. CAD Explorer reads these and shows them on this page, and can carry them through to your exports — see Include metadata. (This information is shown inside the app; it isn't added to Windows Explorer's own Details pane.)
Exporting
CAD Explorer can convert your drawing into raster images, PDF, or SVG. There are three dedicated export pages — Export as images, Export as PDF, and Export as SVG — that share the same workflow. You can export several sizes, and one file per layout, in a single click.
Images
Raster output (PNG, JPEG, and more). Each size becomes its own pixel-perfect file.
Vector PDF that stays sharp at any zoom. Optionally embeds the drawing's document metadata.
SVG
Vector SVG for the web and editors such as Inkscape. Optionally embeds Dublin Core metadata.
Export settings
| Setting | Description |
|---|---|
| Output folder | Where exported files are saved. Click Browse to pick a folder, or Open to view the current destination in Explorer. The folder is created if it doesn't exist. |
| File name template | Controls how exported files are named, using tokens like {name}, {layout}, and {size} — see the token reference. A live sample shows what the file name will look like. |
| Image format | (Images page only) the output format: PNG, JPEG, BMP, TIFF, and others registered on your system. See the full list. |
| Overwrite | When on, existing files with the same name are overwritten. When off, existing files are skipped with a warning. |
| Preserve transparency | When on, transparent areas are kept. When off, they're filled with the background colour set on the CAD document page. Available for formats that support an alpha channel, and always for PDF and SVG. |
| Include metadata | (PDF and SVG) embeds the drawing's title, author, subject, keywords, and dates into the exported file's metadata. |
Export sizes
Each row in the size list produces one output file. The number is a pixel size: the drawing's longest side is scaled to that many pixels and the other dimension scales proportionally. Default sizes are 256, 512, 1024, and 2048 pixels.
Add output size
Adds the next standard size (256 → 512 → 1024 → 2048). Once all standard sizes are present, it doubles the largest existing size.
Clear all / Remove
Click Clear all to remove every size, or Remove next to a single row to delete just that one.
You can also edit a size number directly in any row. Sizes are always sorted smallest to largest.
Exporting layouts
When the drawing has multiple layouts, CAD Explorer can export each selected layout to its own file. Because several files would otherwise collide, the {layout} token becomes required in the file name template whenever more than one layout is exported. You can choose whether exports default to the model layout only or all layouts in Settings.
Running an export
- Open a drawing on the CAD document page first.
- Go to Export as images, Export as PDF, or Export as SVG.
- Set your output folder, format (images), sizes, and any options.
- Click the blue Export button. A notification confirms how many files were saved.
The Export button is disabled if the output folder is invalid, the file name template is missing {size} (or {layout} when exporting multiple layouts), no sizes are listed, or no format is selected. A red message explains what needs fixing.
Recent Files
The Recent files page keeps a list of drawings you've opened before, so you can jump back to them quickly.
| Action | Description |
|---|---|
| Click a file link | Opens that drawing in the viewer. |
| Clear recent files | Removes all entries from the history. You'll be asked to confirm if the list isn't empty. |
| Remove missing files | Scans the list and removes entries for files that have been deleted or moved. |
You can turn recent-file history off entirely in Settings if you prefer not to track recently opened drawings.
Settings
The Settings page groups the app's options. Most viewing and export choices are made in context (zoom and background on the CAD document page, options on each export page).
Appearance & behavior
| Setting | Options | Description |
|---|---|---|
| App theme | Light Dark System | Controls the app's colour scheme. Use system setting follows your Windows light/dark mode. |
| Layout choice for exports | Model All | What layouts are selected by default when you open an export page. |
| Save recent files history | On / Off | When off, CAD Explorer stops recording recently opened drawings. If you turn it off with entries present, you're asked whether to clear or keep them. |
| Open drawings on their saved view | On / Off | When on, model space opens framed on the drawing's saved view instead of fitting to the window. Drawings without a saved view always fit to the window. You can still switch per drawing from the toolbar. |
Explorer thumbnails integration
| Setting | Options | Description |
|---|---|---|
| DWG files | Thumbnail then render Thumbnail only Render Disable | How thumbnails are produced for DWG files. Using the embedded thumbnail (when present) is fastest; rendering is most accurate. |
| DXF files | Render Disable | Whether DXF files get rendered thumbnails (DXF files don't carry an embedded thumbnail). |
| Reset Explorer thumbnails | Button | Forces Windows Explorer to refresh all thumbnails so thumbnail-setting changes take effect. |
The About section shows the app version and a link to display detailed System Information — useful when reporting an issue. Your last-used export folder, file name template, image format, sizes, transparency, and background colour are remembered automatically between sessions.
Supported Formats
Input
CAD Explorer reads AutoCAD DWG and DXF drawings across common versions.
Export
Raster exports cover all image formats registered on your Windows system; the most common are shown below. PDF and SVG are vector formats that stay sharp at any size. A green dot marks formats that support transparency; a blue dot marks vector formats.
* HEIC/HEIF requires the HEIF Image Extensions package from the Microsoft Store, or another codec that registers HEIC/HEIF support. If it's not installed, the format won't appear in the list.
Best for sharing a drawing: use PDF or SVG — both are vector, so the recipient can zoom in without it turning blocky. For raster previews and thumbnails, PNG with Preserve transparency is the safest all-round choice.
File Name Tokens
Customise how exported files are named using these tokens in the File name template field. Tokens are case-insensitive. Write {{ if you need a literal brace.
Example template: {name}_{layout}_{size} produces files like floorplan_Sheet 1_1024.png and floorplan_Model_2048.png. The {size} token is always required; add {layout} whenever you export more than one layout.
Keyboard Shortcuts
Quick actions available in the CAD Explorer app and in the Windows Explorer preview pane.
In the CAD Explorer app
In the Windows Explorer preview pane
Window & navigation
Limitations
CAD Explorer is a fast, accurate viewer and exporter — not a CAD editor. Knowing what it focuses on helps set expectations.
2D rendering
CAD Explorer renders the 2D content of a drawing — the geometry you see in a layout. It is not a 3D viewer: 3D solids and surfaces are not rendered as 3D, and drawings built primarily as 3D models may show little or nothing in a given layout. For 3D work, use a full CAD application. When such a drawing carries an embedded preview image, CAD Explorer still shows it on a Preview tab, and the Explorer preview pane falls back to that saved image automatically, so you can see what the drawing looks like even when its layouts render blank.
View & export only
You can open, inspect, and export drawings, but you cannot edit them or save changes back to DWG/DXF. CAD Explorer never modifies your original files.
Fonts & external content
Text is drawn with the fonts available on your system, so unusual or proprietary CAD fonts may be substituted and look slightly different. Content that lives outside the file — external references (xrefs) and externally-linked images — may not appear unless it's embedded or available alongside the drawing. Very new, unusual, or damaged files, and certain custom or proxy object types, may not open or render completely.
High-DPI & scaling: the viewer, preview, and exports use resolution-independent vector rendering, so drawings stay crisp at any zoom and on high-DPI / scaled displays (125%, 150%, 200%, and beyond). Thumbnails and previews are produced at the exact resolution Windows Explorer requests, and exports are pixel-exact at the size you choose.
Tips & Tricks
Exporting every sheet at once
- Open a multi-layout drawing and go to an export page.
- In Settings, set Layout choice for exports to All so every layout is selected.
- Make sure your template includes
{layout}, e.g.{name}_{layout}_{size}. - Click Export — you get one file per layout per size in a single run.
Carrying drawing info into your exports
When exporting to PDF or SVG, turn on Include metadata to embed the drawing's title, author, subject, keywords, and dates. The PDF stores them in standard document properties (visible in Adobe Acrobat and others), and the SVG stores them as Dublin Core metadata (visible in editors such as Inkscape).
Speeding up a folder full of DWGs
If Explorer feels slow generating thumbnails, set the DWG thumbnail mode to Only get thumbnail if available in Settings — it skips rendering and uses each file's embedded preview.
Thumbnails look out of date?
After changing thumbnail settings, click Reset Thumbnails in Settings to make Windows Explorer rebuild its thumbnail cache. You can also clear it with Windows' built-in Disk Cleanup tool: press Win+R, run cleanmgr, tick Thumbnails, and click OK.
Thumbnails or previews don't show (another app is the default)
Windows lets only one app provide thumbnails and the preview pane for a given file type: the app currently set as the default for that type. If another installed program also handles DWG or DXF drawings and is set as the default, Windows uses its thumbnails and preview instead, so CAD Explorer's may not appear.
- Open Windows Settings → Apps → Default apps.
- Find and click CAD Explorer in the list (type its name in the search box if needed).
- For each drawing extension (
.dwgand.dxf), click the file type and choose CAD Explorer as the default.
Thumbnails and previews always follow the file type's default app, so this works in reverse too: if you prefer another app for one of the formats, leave it set to that. After changing the default, run Settings → Reset Thumbnails if Explorer still shows old cached thumbnails.
Preview stays blank for files downloaded from the internet
Starting with Windows 11 25H2, Microsoft blocks the File Explorer preview pane for files that carry the "Mark of the Web" — files downloaded from the internet, or coming from a location Windows considers unsecured. This affects every file type, not just DWG/DXF drawings, and it is a Windows security decision: there is nothing CAD Explorer can do at its level to override it.
How to restore the preview: right-click the file → Properties, tick Unblock at the bottom of the General tab, then click OK. To clear many files at once, PowerShell's Unblock-File cmdlet does the same in bulk.
Microsoft has acknowledged this behaviour. For the full explanation and more ways to re-enable previews, see this Windows Latest article — in particular its "How to unblock previews in File Explorer" chapter.
Dark mode
CAD Explorer follows your Windows theme by default. For a fixed look, choose Light or Dark explicitly in Settings.
If CAD Explorer has earned a spot in your workflow, a quick rating on the Microsoft Store helps other people discover it, and it means a lot to our small team. It takes less than a minute.
★ Rate CAD Explorer on the Microsoft Store