OG Image Testing & Validation: Platform Tools and QA Checklist

Testing your OG images before publishing is essential. Here’s how to validate across all major platforms.

Platform Validation Tools

Facebook Sharing Debugger

URL: developers.facebook.com/tools/debug/sharing/

Paste your URL and click “Debug” to see exactly how Facebook parses your OG tags and renders your image. This tool also lets you scrape updated content after changes.

Twitter Card Validator

URL: cards-dev.twitter.com/validator

Shows preview of how your Twitter/X card will appear. Note that Twitter caches aggressively—changes may take up to 24 hours to appear without manual cache clearing.

LinkedIn Post Inspector

URL: linkedin.com/post-inspector/

Validates OG tags and shows LinkedIn’s rendering. Pay attention to the 1200×628px dimension requirement (628, not 630).

Visual QA Checklist

Test every OG image before publishing:

Here’s an example that passes all visual QA tests - readable at any size, proper contrast, and clean typography:

Centered long text

Clean centered SaaS landing page with domain and tagline

Platform Open Graph

Layout Centered Long

Background #8B5CF6

Text title, subtitle, domain

Images logo

Try this example →

• Image displays correctly on all target platforms (Facebook, Twitter/X, LinkedIn)
• Text is readable at 50% scale (mobile size)
• Contrast meets 4.5:1 minimum (test with WebAIM Contrast Checker)
• Logo is visible and properly positioned
• No critical content is cropped at edges
• File format is correct (JPG/PNG)
• Image is properly balanced (not visually lopsided)
• Image quality is sharp (no pixelation or compression artifacts)
• Image loads quickly (<2 seconds on 3G)

Browser and Device Testing

Test on actual devices when possible:

Desktop Browsers

• Chrome (latest version)
• Safari (latest version)
• Firefox (latest version)

Mobile Devices

• Safari on iOS
• Chrome on Android

Testing Process

1. Generate image
2. Upload to production
3. Clear cache
4. Share on platform
5. Verify rendering
6. Test on multiple browsers/devices

Image Optimization Tools

Use these tools to optimize file size without sacrificing quality:

• TinyPNG - Excellent PNG compression
• ImageOptim (Mac) - Batch optimization
• ImageMagick (CLI) - Programmatic optimization

Target: JPG at 85% quality for photos, optimized PNG for graphics/text.

Common Testing Issues

Image Not Updating

Platforms cache OG images aggressively. Solutions:

1. Use the platform’s debugger to force re-scrape
2. Add a cache-busting query parameter temporarily (e.g., ?v=2)
3. Wait 24-48 hours for natural cache expiration

Wrong Image Displayed

Check that:

1. og:image URL is absolute (starts with https://)
2. Image URL is publicly accessible
3. Image dimensions are at least 1200×630px
4. No redirect on the image URL

Text Looks Blurry

Possible causes:

1. Image dimensions too small (use 1200×630px minimum)
2. Heavy compression (increase quality to 85%+)
3. Wrong format (use PNG for text-heavy images)

Ready to test your OG images? Create them first with FrameIt—built with validation best practices in mind.