Ad Corrector

About Ad Corrector

Ad Corrector is a free browser tool that reviews billboard and outdoor ad designs before they go live. It is built for designers, agencies, brand teams and out-of-home media owners who want clearer creative decisions before production or launch.

You upload an artwork file, choose the billboard format, traffic speed and viewing distance, then confirm the headline and supporting copy. The tool scores clarity, contrast, layout and copy length, shows a heatmap and a speed preview, and produces a letter grade with prioritized next steps and a downloadable one-page report. No signup is required.

The site stresses that its results are directional estimates based on rule-based checks, not predictions of recall, action or campaign performance, and not a substitute for live testing. Its focus is how quickly a driver can understand a message at driving speed.