Post Preview Generator
Generate accurate, pixel-perfect previews of your social media posts before publishing. Supports LinkedIn, Instagram, Facebook, and Twitter/X — with real-time updates as you type.
Generate previews, compare A/B variants, and export for approvals — completely free.
Live Post Preview Generator
Enter your content below and generate a live preview. Switch between platforms to see how your post renders on each network.
Live Preview
username Your caption will appear here...
Type something to see the preview
The Most Complete Post Preview Generator
From live rendering to AI copy generation and engagement prediction — everything you need to generate the perfect post preview.
Instant Preview Generation
Type your post and see a live preview update in real time — no submit button, no page reload. As you write, the generated preview mirrors exactly what your audience will see on the live platform.
Multi-Platform Output
Generate previews for LinkedIn, Instagram, Facebook, and Twitter/X from a single content input. Switch platforms instantly to see how the same message renders differently across each network's UI.
A/B Variation Generator
Generate multiple versions of the same post with different hooks, CTAs, or hashtag strategies. Compare them side by side to identify which variation will drive higher engagement before committing to one.
AI-Powered Copy Generator
Describe your goal and let the AI generate platform-optimized post copy for you. Each generated variant is scored for predicted reach, engagement rate, and click-through likelihood on the selected platform.
Mobile Preview Generation
Generate accurate mobile previews alongside desktop views. Mobile feeds render text differently — Instagram captions truncate at fewer characters on small screens. Always check the mobile-generated preview before posting.
Shareable Preview Export
Export your generated preview as a high-resolution PNG, shareable PDF, or embeddable link. Use it in client presentations, Slack approvals, or content calendar tools — no platform account required to view.
AIPostMockup vs Generating Previews Elsewhere
See why dedicated post preview generation beats native platform drafts and generic design tools.
| Feature | AIPostMockup | Native App Draft | Canva / Figma |
|---|---|---|---|
| Live real-time preview | ✕ | ✕ | |
| All 4 platforms in one tool | ✕ | ||
| Mobile + desktop view toggle | limited | ✕ | |
| AI copy generation | ✕ | basic | |
| Engagement prediction score | ✕ | ✕ | |
| Export as PNG / PDF | ✕ | ||
| No account required | ✕ | ✕ | |
| Team sharing link | ✕ |
Post Preview Generator: Common Questions
Everything you need to know about generating social media post previews.
What does a post preview generator do?
A post preview generator creates a visual replica of how your social media post will appear on a specific platform — including the exact fonts, colors, character truncation points, UI chrome (reaction bars, share buttons, follower counts), and image layout — before you publish. It eliminates the need to draft a post inside each platform's native composer just to see how it looks, saving time and preventing formatting errors from reaching your audience.
How is a post preview generator different from just drafting in the app?
Platform native drafts have several limitations: you need to be logged in to the specific account, you can't easily share the draft with stakeholders who don't have access to that account, you can't compare two versions side by side, and the preview is often only visible on one device. A dedicated post preview generator like AIPostMockup lets you instantly generate previews without any account, share them as images or links, compare A/B variants, and see both mobile and desktop views simultaneously.
Which platforms does the post preview generator support?
Our post preview generator supports LinkedIn (personal and company page posts up to 3,000 characters, document posts, polls), Instagram (feed posts up to 2,200 characters, Stories, Reels captions, hashtag rendering), Facebook (News Feed posts, link card previews, reaction simulation), and Twitter/X (tweets up to 280 characters, thread previews, media card generation). Each preview is generated to match the current UI of the live platform.
Can I generate previews for LinkedIn company page posts?
Yes. When generating a LinkedIn preview, you can switch between personal profile mode (showing your name and headline) and company page mode (showing your company name, logo, and follower count). The generated preview matches the exact layout LinkedIn uses for company page posts — including the "Follow" button placement, logo size, and engagement action bar — which is slightly different from personal post rendering.
How do I generate an Instagram post preview with hashtags?
In the Instagram preview generator, type your caption as you would in the Instagram app — including hashtags either in the caption body or separated by dots. The generated preview renders hashtags in Instagram blue, shows the "more" truncation at 125 characters, and displays how your first line (the hook) appears above the fold. You can also generate a preview of the hashtag-in-first-comment strategy to decide which placement looks cleaner for your brand.
Can I generate a Twitter/X thread preview?
Yes. In Twitter/X mode, you can generate a preview of individual tweets or full threads. Write each tweet in a separate input field and the generator renders the full thread with reply indicators, engagement counters, and the visual thread line connecting each tweet. This lets you see how your thread flows, whether any tweet runs over the character limit, and how the opening tweet looks as a standalone post if someone only sees the first tweet in their feed.
Is the post preview generator free to use?
Yes. The core post preview generator — including real-time preview for all 4 platforms, mobile/desktop toggle, and standard PNG export — is free with no account required. Create a free account to unlock 5 AI credits for copy generation. Paid plans starting at $9/month unlock unlimited AI generation, engagement prediction scoring, A/B variant comparison, watermark-free bulk export, and team collaboration features.
Can I use the generated previews for client presentations?
Yes — this is one of the most common use cases. Social media managers, agencies, and freelancers use the generated previews as visual assets in pitch decks, content approval flows, and monthly reporting. Export your generated previews as high-resolution PNGs or combine multiple platform previews into a single PDF. Clients can immediately see what they're approving instead of trying to imagine how a text brief will look in a live feed.
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Generate previewGenerate Your Post Preview in Seconds
Free, instant, and accurate across all major social media platforms. No account needed to start.