Quick UI mockup online

Before a polished design, a rough UI mockup can help you decide layout, navigation, and page priority. PlainCanvas is useful for this early sketching stage.

Sketch the screen hierarchy

Start with the main content areas: navigation, hero, cards, form, table, sidebar, or footer. Use labels to name the blocks. Do not spend too much time on pixel-perfect spacing during the first pass.

Mark the important action

Use one accent color to show the main button or decision point. A quick mockup becomes more useful when it clearly shows what the user should do next.

Share the rough idea

Export the mockup as a PNG and attach it to a message, design brief, or issue. A rough image can clarify a conversation faster than a long paragraph.