Preview Celtra ad creatives in standard IAB sizes with device simulation and publisher context. Select a device type, size, position, and preview mode. The tool generates the sandbox URL.
How It Works
1. Enter a Creative ID
Paste the 8-character hex Creative ID (e.g. 81e89b8a) from Celtra into the input field. The tool immediately generates a preview URL and loads it in the iframe.
2. Choose a Device Type
| Device | Behaviour |
|---|---|
| Phone | Constrained iframe width matching real device viewports (320–428px) |
| Tablet | Constrained iframe width for tablet viewports (600–800px) |
| Desktop | Full-width iframe with simulated webpage frame |
3. Select Device Size
Phone sizes:
| Label | Width | Comparable Devices |
|---|---|---|
| XS | 320px | iPhone 5 |
| S | 375px | iPhone 13 Mini, Galaxy S21 |
| M | 390px | iPhone 14, Galaxy S21 Plus |
| L | 428px | iPhone 14 Plus, Galaxy S21 Ultra |
Tablet sizes:
| Label | Width | Comparable Devices |
|---|---|---|
| S | 600px | 7" Galaxy Tab 7 |
| M | 768px | 9" iPad, Nexus 7 |
| L | 800px | 10" Galaxy Tab 10 |
4. Configure Preview Options
| Option | Values | Description |
|---|---|---|
| Preview Mode | Inline, Sticky Top, Sticky Bottom, Fullscreen | Controls how the creative is positioned on the simulated page |
| Fold Position | Above the fold, Below the fold | Where the creative appears relative to the fold |
| Creative Position | Top, Sidebar Left, Sidebar Right | Desktop only. Controls creative placement on the page |
5. Publisher Overlay
Select a publisher from the dropdown to overlay a simulated navigation bar on the preview. This helps visualise how the ad creative appears within a publisher's site context.
URL Sharing
The tool's URL updates with hash parameters as you change settings. Copy and share the full URL to let others open the same preview configuration.
Example: index.html#id=81e89b8a&device=Phone&phoneSize=390&fold=below
Mobile Behaviour
On mobile devices, the tool redirects directly to Celtra's native preview URL instead of showing the sidebar UI. The shareable hash URL still works. Opening it on desktop shows the full tool interface.
Generated URL Format
The tool generates Celtra sandbox URLs in this format:
https://preview-sandbox.celtra.com/preview/{creativeID}/frame?{params}
Use the Copy URL button to copy the generated URL, or Open to launch the preview in a new tab.