What is the optimal image size for og:image?

The recommended dimensions are 1200 × 630 pixels (an aspect ratio of 1.91:1). Images should be under 5 MB and served over HTTPS to ensure full-width card rendering across all platforms.

What is the difference between summary and summary_large_image on Twitter?

"summary" renders a small square thumbnail next to the headline. "summary_large_image" creates a prominent, full-width photo banner with higher click-through rates.

Can I test staging or password-protected websites?

Yes! Switch to the "Paste HTML Source" tab and paste your page’s HTML. Because parsing runs 100% locally in your browser, you can inspect private and localhost pages with complete privacy.

What is the optimal image size for og:image?

The recommended dimensions are 1200 × 630 pixels (an aspect ratio of 1.91:1). Images should be under 5 MB and served over HTTPS to ensure full-width card rendering across all platforms.

What is the difference between summary and summary_large_image on Twitter?

"summary" renders a small square thumbnail next to the headline. "summary_large_image" creates a prominent, full-width photo banner with higher click-through rates.

Can I test staging or password-protected websites?

Yes! Switch to the "Paste HTML Source" tab and paste your page’s HTML. Because parsing runs 100% locally in your browser, you can inspect private and localhost pages with complete privacy.

Social Media Preview & Meta Tag Validator

Open Graph & Twitter Card Tester

Test and preview how your website appears when shared on Facebook, X / Twitter, LinkedIn, and WhatsApp. Validate og:image, dimensions, titles, and generate ready-to-paste tags.

Website URL (e.g. https://yourdomain.com)

Social Feed Card Preview

toolstack.tools

ToolStack — Free Online Developer & Business Tools

Over 50+ privacy-first, client-side tools for developers, SEO specialists, marketers, and entrepreneurs.

Social Tag Audit4/4 passed

og:title:og:title is optimal (50 chars).

Will display cleanly across major feeds.

og:image:og:image is configured with HTTPS.

Recommended resolution: 1200 x 630 px (1.91:1).

og:description:og:description present (104 chars).

Good length for social cards.

twitter:card:twitter:card ist "summary_large_image".

Full-bleed image card enabled on X.

Ready-to-Paste HTML Code

<!-- Open Graph / Facebook / LinkedIn -->
<meta property="og:type" content="website" />
<meta property="og:url" content="https://toolstack.tools" />
<meta property="og:title" content="ToolStack — Free Online Developer & Business Tools" />
<meta property="og:description" content="Over 50+ privacy-first, client-side tools for developers, SEO specialists, marketers, and entrepreneurs." />
<meta property="og:image" content="https://images.unsplash.com/photo-1460925895917-afdab827c52f?auto=format&fit=crop&w=1200&h=630&q=80" />

<!-- Twitter / X -->
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="ToolStack — Free Online Developer & Business Tools" />
<meta name="twitter:description" content="Over 50+ privacy-first, client-side tools for developers, SEO specialists, marketers, and entrepreneurs." />
<meta name="twitter:image" content="https://images.unsplash.com/photo-1460925895917-afdab827c52f?auto=format&fit=crop&w=1200&h=630&q=80" />

The Complete Guide to Open Graph & Social Optimization

1. Optimal Image Dimensions (1200 x 630 px)

Social platforms strongly favor 1.91:1 ratio images at 1200 × 630 pixels. Anything smaller than 600 × 315 pixels will be downgraded by social feeds to an unappealing square thumbnail.

2. Twitter Card Fallback Hierarchy

While X automatically falls back to standard Open Graph tags, explicitly setting <meta name="twitter:card" content="summary_large_image" /> is essential to ensure full-bleed image card rendering instead of a truncated compact snippet.

Frequently Asked Questions

Clear, concise answers to common questions about Base64 decoding, encoding, and specifications.

An Open Graph Tester inspects and previews the meta tags (og:title, og:description, og:image, og:url, and twitter:card) that dictate how your web links display when shared on Facebook, X / Twitter, LinkedIn, and messaging apps.

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