Social Preview Tester
See exactly how your link looks on every social platform. Test, edit and perfect your previews in real time, with AI-powered fixes and copy-paste HTML.
- 100% free
- No sign-up
- 10+ platforms
- Copy-paste HTML
Paste a URL above to see how it appears on every social platform.
Why this preview tester is different
Other tools show you 3 platforms with generic thumbnails. This one shows 10+ with real app-style cards, a live editor and AI-powered fix suggestions.
10+ platforms, real app UIs
Facebook, X, LinkedIn, Discord, Slack, iMessage, WhatsApp, Telegram, Pinterest and Google, each card styled like the actual app.
Live editor mode
Edit og:title, og:description and og:image in the sidebar: all 10 previews update instantly. No need to redeploy your site.
AI-powered fix suggestions
Claude scores your tags 0-100 and gives specific, actionable fixes, not generic advice.
Test custom images first
Upload a new og:image and see how it looks across every platform before you publish it.
Mobile + dark mode toggle
See how your card renders on mobile versus desktop, and in light versus dark UIs, where most people actually see it.
One-click optimised HTML
When you're happy, copy the optimised <meta> tags, ready to paste straight into your site's <head>.
How to use it: 3 steps, 30 seconds
Paste your URL
Drop in any web page: your blog post, product page or homepage.
See & edit
See how it appears on 10+ platforms instantly. Edit any field in the sidebar: previews update in real time.
Copy the HTML
When it looks perfect, copy the optimised meta tags and paste them into your site's <head>.
Why social previews matter
A great social preview can lift your click-through rate by 40% or more.
When someone shares your link on LinkedIn, Slack or WhatsApp, the preview card is the entire first impression. A blurry image, truncated title or missing description means people scroll past. Get it right and every share turns into traffic.
Frequently Asked Questions
What is Open Graph?
Open Graph (OG) is a set of HTML <meta> tags that tell social platforms how to display your link. They control the title, description and image that appear when someone shares your URL. Without them, platforms fall back to scraping whatever content they can find on your page, which usually looks poor.
Why does my image not show on Facebook?
The most common causes: the image is smaller than 600×315px, the image URL is relative rather than absolute, or Facebook has cached an old version. Verify your og:image tag here, then use Facebook's Sharing Debugger to force-refresh their cache.
What's the perfect image size?
1200×630 pixels is the safe universal size that works on Facebook, LinkedIn, X, Slack, Discord and iMessage. Pinterest is the exception: it prefers 1000×1500 (portrait). Use a JPEG or PNG under 5MB.
Why does X (Twitter) truncate my title?
X truncates titles at roughly 70 characters in the card view. This tool shows the exact length and flags overruns. Facebook is more generous at ~100 characters, LinkedIn at ~200.
Do I need separate Twitter and OG tags?
No. X falls back to OG tags when the Twitter-specific ones are missing. You only need both if you want different content on X versus other platforms, which is rare.
Is this tool really free?
Yes, completely free, no signup. The previews and validation have no limits. The AI Score has a generous hourly limit to keep costs sustainable. Built and maintained by SEO First Web.
Other Free SEO Tools
Advanced Schema Builder
173 schema types, smart dependencies, validation and rich-snippet previews.
Open tool →SERP Preview
See exactly how your title and meta description render in Google search results.
Open tool →SEO Audit
Full-site SEO audit in 30 seconds: Lighthouse scores, security grade and on-page checks.
Open tool →Want help optimising your whole SEO strategy?
Send us your website address on WhatsApp and we will tell you what is worth fixing first, free and with no obligation. Or pick the service that fits.
-
Find what to fix
£295
SEO Audit: a full review of your site, a prioritised fix list and a 30-minute call to walk you through it.
See SEO services -
Build you a new website
From £900
Fast, mobile-friendly websites with SEO set up from launch. Fixed prices from £900, no VAT to add.
See web design packages -
Grow your traffic every month
From £250 a month
on the 6-month plan, £1,500 paid upfront
Monthly SEO: technical, local and content work with plain-English reporting. No long contracts: SEO plans run for 1, 3 or 6 months, paid upfront, and nothing renews automatically.
See Monthly SEO
Or call 020 8050 4108.