Put it into practice
- Open the exported file outside the editor.
- Confirm its dimensions, format and expected watermark state.
- Inspect text, crop and transparency at normal scale.
What this looks like
A designer catches a JPEG white background before placing the image on a colored website.
A detail to keep clear
A successful download confirms file creation, not that the asset meets every destination requirement.
Using MockupX
MockupX exports PNG and JPEG, with WebP and 2× output available to Pro accounts. Export requires sign-in, and free exports carry a watermark. A transparent background remains transparent only in a format that supports it. Inspect the downloaded file, not only the editor preview.
Check the result
Keep the original screenshot, then review the exported file at the size where people will see it. Check the message, the visible interface and the final crop separately. For a handoff, record the destination and the approved file so another person can distinguish the final version from a draft.
References and further reading
Use the official references for format behavior and current destination requirements. The composition advice above is a practical design approach, not a promise of platform approval.
MDN image formats ↗