How does Ad Corrector work?

Ad Corrector evaluates billboard and outdoor ad designs using automated visual checks such as text extraction, readability guidance, contrast analysis, speed-view simulation, color palette review, layout signals, and CTA checks. It returns performance signals and recommended fixes.

Is Ad Corrector free to use?

Yes. Ad Corrector is free to use. You can upload a design, view the analysis, and download a report with no signup required.

Are uploads stored or used for training?

No. Ad Corrector does not store user-uploaded designs or use them for training. Files are processed only to generate the analysis for the user.

Ad Corrector

Free Billboard Testing for Real-World Visibility

Upload your billboard or outdoor ad design to test clarity, contrast, layout, and message visibility in seconds. Rule-based scoring. Same input, same result.

Test Your Ad Now

Spot Visibility Issues

Detect low contrast, crowded layouts, and weak hierarchy using objective visibility checks before deployment.

Test Real-World Readability

Evaluate clarity and structure using constraints modeled for outdoor viewing distance and speed.

Deterministic Scoring

Receive a grade (A–F), detailed score breakdowns, heatmap, speed view simulation, and improvements.

Most outdoor ads lose attention in seconds

Fix Design Issues Before They Cost You

Ad Corrector reveals readability issues and layout problems before you print or launch.

Analysis

Performance

Check readability.

Heatmap

View attention areas.

Speed View

Drive-by visibility.

Grade (A–F)

Score in seconds.

Outputs

Improvements

Clear next steps.

Report Download

One-page summary.

Emotional Signal

See how it feels.

Viewer Reaction

Predicted response.

Results Preview

See what you receive after running your outdoor ad test.

Grade and Scores

Attention Heatmap

Speed View

View tested examples

→ Curious how real billboards perform? View tested examples

Run My Billboard Test

No signup required. Results delivered in seconds.

About Ad Corrector

Ad Corrector evaluates billboard and outdoor ad designs for clarity and readability by analyzing text proportion, contrast, layout structure, and overall message visibility. Ad Corrector was built for designers, agencies, and brand teams who need clarity before launch.

Run a Free Billboard Check

How Ad Corrector reviews your ad

A clarity checkup for real-world outdoor ad viewing

Ad Corrector focuses on how easily drivers can understand your message at driving speeds, not on campaign performance. Each test looks at clarity signals and provides practical recommendations.

✓

Clarity Score

Ad Corrector evaluates readability, contrast, and message visibility using a 0–100 scale. This shows where clarity is strong and where it may fall short.

✓

Speed View

A speed preview shows how your design reads at driving speeds and which elements stay legible or fade when viewed in motion.

✓

Improvement Guidance

Each test ends with practical suggestions to improve clarity or visibility, so you leave with directional next steps instead of a vague score.

Billboard Testing Knowledge Base

How Billboard Testing Actually Works

Many billboard ads fail before launch not because of creativity, but because they are never evaluated under real-world viewing conditions. If you want the underlying logic behind Ad Corrector, start here.

Reference Explore the OOH Core Knowledge Series →

Outdoor ads are often judged after launch using recall, lift, or attribution. Those metrics can be useful, but they do not prevent a message from being unreadable at speed.

True pre-flight testing asks a simpler question. Can someone read, understand, and remember the message in the seconds they actually have. That is the difference between delivery and comprehension.

Category Definition

What Are Billboard Testing Tools

A clear definition of the category, what exists today, what does not, and why most “testing” happens too late.

Read the definition

Billboard Testing Methods

Common Methods Used to Test Billboard Ads

A practical breakdown of how billboard ads are reviewed before production, and what each method can and can’t tell you.

See the methods

Design View / Speed View

See how your billboard may read at driving speed. This demo shows one of several clarity checks built into Ad Corrector.

Example demo. Upload to see your design below.

Not sure how this works? Watch a short demo

How Ad Corrector Works

1

Upload your outdoor ad design

2

Review and confirm the text

3

Click Analyze Billboard

4

Results include

Grade
6 Scores
Speed View
Attention heatmap
Improvements
Report

Step 1 · Technical review

Ad Corrector

Professional billboard analysis

Upload Your Billboard Design

Drag and drop or click to upload (JPG, PNG, max 10MB)

Secure & confidential - your design stays private

Design Details

⚠ Photo Detected: This appears to be a photo or screenshot. Results may be less accurate. For best results, please upload the flat outdoor ad artwork file.

Board Type

Board Height (feet)

Viewing Speed (mph)

Viewing Distance (feet)

For best results: Enter copy exactly as it appears on the ad. Headline, CTA, and body are evaluated separately.

CTA scoring note: Leaving the CTA field blank will score the ad as having no CTA.

Headline Text

Call-to-Action (CTA)

Body/Supporting Text (Optional)

Analysis Results

Simulates how your audience sees your creative
65 mph • 600 ft

High Cognitive Effort

Moderate Cognitive Effort

Low Cognitive Effort

Red means the brain must work harder to decode. Green means it is understood instantly at speed and distance.

A

Visibility summary will appear here after analysis.

🔧 Improvements

✅ What's Working

Results are guidance based on OOH visibility principles. Not a performance guarantee.

Step 2 · Emotional analysis Derived from Step 1 results

Shows how viewers will feel in the first 1-2 seconds, based on visibility and clarity from Step 1.

What this shows

Quick emotional snapshot: how your ad registers in 1-2 seconds of exposure at speed.

Status: Waiting for Step 1

Run visibility analysis first. This section updates automatically when complete.

Persuasion score – / 100

Pending analysis

Top strength: – Main risk: –

Grabs attention

– / 10

Clear next step

– / 10

Easy to process

– / 10

Higher scores = stronger emotional response. All metrics use a 0-10 scale.

Emotional impact (summary)

If you change one thing, improve the weakest signal first.

Likely viewer reaction

Waiting for Step 1 analysis to complete.

Fix first (highest impact)

—

What's working

Strengths will show here once analysis completes.

What to fix next

Risks and quick fixes will show here once analysis completes.

Industry research from Nielsen has shown creative to be a major driver of ad effectiveness.

Built for how OOH is actually seen.

People don’t stand around studying outdoor ads. They glance. They move. They’re gone.

Ad Corrector looks at the creative file, the text, the layout, then quickly checks what comes through in real life. Your results are delivered on demand. Analyze your outdoor ad →

Something is off if reviewing one ad takes meetings, decks, or weeks to explain whether your OOH ad is readable. Ad Corrector exists because clear creative should not be complicated.

FAQs

FAQs Continued

These questions cover more technical or advanced topics.

Upload My Design

No signup required. Results delivered in seconds.

OOH Educational Articles

Clear thinking for outdoor advertising.

The Decisions That Determine Whether OOH Works

Pre-flight decisions, real-world viewability, and why post-campaign metrics can’t fix unclear outdoor ad creative once a campaign is live.

OOH Needs Viewable Creative, Not Just Impressions

Digital evolved from impressions to viewable impressions. OOH still counts traffic without checking if creative can actually be seen or understood.

Post-Launch Measurement in Outdoor Advertising Is Too Late

Outdoor ads are fixed at launch. Learn why post-launch measurement comes too late to fix creative issues and how late decisions create OOH waste.

Pre-Flight Testing in Outdoor Advertising Explained

Learn what pre-flight testing means for outdoor advertising and why evaluating creative before launch reduces risk, waste, and costly mistakes.

Why Billboard Ads That Look Fine Still Fail | OOH Creative Clarity

Many billboard ads look acceptable but fail once posted. Learn how small creative decisions affect clarity, hierarchy, and fast message understanding.

Most OOH Advertising Gets This Wrong | Creative Decisions Matter

Most outdoor ads fail before launch from flawed creative decisions. Learn what goes wrong and how to fix it before spending ad money.

What OOH Can and Cannot Do | Limits of Outdoor Advertising

Understand what out-of-home advertising does well, where it breaks down, and why realistic expectations matter before creative and media decisions are made.

OOH Creative Decisions: Opinion vs Data in Outdoor Advertising

Many OOH creative decisions rely on opinion instead of evidence. Learn why this happens and how data-driven clarity checks improve outdoor advertising outcomes.

Why OOH Creative Decisions Must Happen Before Launch

Outdoor advertising can’t be fixed after launch. Learn why OOH creative decisions must happen early and how teams avoid clarity issues before media runs.

Why OOH Advertising Works Differently Than Other Media

Out-of-home advertising is seen at speed and distance, not up close. Learn why OOH works differently than other media and how that affects creative decisions.

OOH Creative QA: The Missing Step Before Media Spend

Learn why a pre-flight OOH creative QA step helps catch clarity, hierarchy, and readability issues before media dollars are committed.

How to Test OOH Creative Before You Spend Media Dollars

Learn how to evaluate OOH creative for clarity, hierarchy, and readability before committing media budget. A clear framework for billboards and outdoor ads.

OOH Advertising Formats Explained

A clear guide to major OOH advertising formats, including billboards, transit shelters, posters, and digital displays, with creative considerations for each.

How to Evaluate OOH Creative Before Going Live

Learn how to assess OOH creative for clarity, hierarchy, and readability before launch, so media spend amplifies the message instead of exposing flaws.

OOH Doesn’t Fail. The Creative Does.

Most OOH campaigns fail before launch due to creative clarity issues. Learn how to catch common mistakes before media dollars are spent.

What Is OOH Advertising? 2026 Outdoor Advertising Guide

OOH advertising includes billboards, transit, posters, and digital screens seen outside the home. A clear 2026 guide to how outdoor advertising works.

Billboard Creative Testing vs Digital Ad Testing

Billboard creative testing is not the same as digital ad testing. Learn how outdoor ads must be evaluated for clarity, speed, and real-world viewing conditions.

OOH Ad Testing & Billboard Ad Testing Guide

Learn how OOH and billboard ad testing really works, what matters most for creative clarity, and how to test outdoor ads quickly without wasting time or budget.

Billboard Readability: Designing for Real Drivers

Learn the real reasons most billboards fail and how to fix issues with clarity, visibility, contrast, and readability using practical, real-world strategies.

Why Most Billboards Fail and How to Fix Them

Learn the real reasons most billboards fail and how to fix issues with clarity, visibility, contrast, and readability using practical, real-world strategies.

Design Billboards That Convert: The 6-Second Rule Explained

Learn how to design effective billboards drivers can read in 6 seconds. Includes video tutorial, design tips, and free testing tool.

OOH Pre-Flight Creative Checklist

A practical reference for reviewing outdoor advertising creative before launch, focused on clarity, legibility, and fast message comprehension in real-world viewing conditions.

Download PDF →

Opens in a new tab. Print-ready.

OOH EDUCATION

The 10-Foot Walkback Test Is a Billboard Visibility Myth

Why the hallway test creates false confidence for readability.

Read the article → See the Physics-Informed Standard →

Explains why common tests fail and how to standardize your pre-flight.

Data Tested Series

Billboard Creative, Tested

Popular creative evaluated using objective clarity metrics. Real billboards analyzed for readability, message density, and visibility at highway speeds.

Data vs Opinion

Creative Analysis

Visual Viability & Creative Engineering in OOH

Published: January 31, 2026

How distance, speed, hierarchy, and contrast determine whether creative survives real-world viewing, and why “rule-breaking” sometimes still works.

Speed View

Attention Modeling

Creative Viability

Data vs Opinion

OOH Example Set

5 Billboard Examples Tested Against Ego and Reality

Published: January 16, 2026

Five publicly visible billboards tested using the same Ad Corrector analysis flow: grade, scores, attention heatmap, speed view, plus what’s working and top fixes.

5 full breakdowns

Heatmap + Speed View

Scores + Fixes

Featured by AiDigital

OOH Creative Test

Absolut Billboard: Opinion vs Data

Tested on: December 4, 2025

AiDigital featured this Absolut Juice billboard. We tested readability and clarity using Ad Corrector. See how it performs at driving speeds.

Readability: 53%

Contrast: 97%

Clarity: 71%

CTA Strength: 70%

OOH Reality Check

Unskippable Does Not Mean Effective

Published: December 18, 2025

OOH can’t be skipped, but it can be ignored. Why “unskippable” is not a performance guarantee, with a real transit shelter case study.

Why OOH Ad Testing Matters

Outdoor creative has one job: get your message seen and understood in seconds. Most designs fail because text does not hold up at distance or speed, contrast is weak, or layout pulls attention in the wrong direction.

Ad Corrector gives you a simple way to test before you print or launch so readability issues are caught early.

Use the OOH education hub for the why and the how. Then run a free outdoor ad test when you are ready.