What Is Social Post Mockup?
Social Post Mockup generates realistic previews of how your content will look as a post on Twitter/X, Instagram, Facebook, and LinkedIn. It’s useful for client presentations, content calendars, A/B testing captions, and planning campaigns before publishing.
How to Use This Tool
Select a platform, enter your post text, upload a profile picture and post image, and set engagement numbers (likes, shares, comments). The tool renders a pixel-accurate mockup of the post as it would appear on the platform. Download the mockup as an image. Everything runs in your browser.
Why Use Social Post Mockup?
Screenshotting real posts for mockups is messy and often contains real user data. This tool generates clean, customizable mockups with dummy metrics — perfect for presentations, pitch decks, and social media strategy docs. No signup, no watermarks, fully private. For a detailed walkthrough, see our step-by-step guide.
Frequently Asked Questions
Why mockup a post before publishing?+
Every platform wraps your content in its own chrome — avatar circle size, handle color, timestamp placement, image aspect crop, link card height, character truncation point. What looks tight in your drafting tool often breaks in the wild: a line that fits in Notes gets truncated on Twitter after 280 characters; a square image looks fine on Instagram but crops ugly on LinkedIn's 1.91:1 aspect; a thread preview on Threads hides content after two lines. A mockup shows the truth before you hit Post. It's also useful for screenshotting hypothetical posts for pitch decks, Twitter threads about Twitter, design critiques, and product mocks where you need a plausible-looking social card without creating a real post.
Are the mockups pixel-accurate?+
The card chrome — avatar shape, name weight, handle color, timestamp format, icon row, padding, border radius — is reproduced from each platform's current post card design as of April 2026. X uses 15px body text with a 40px avatar; Instagram uses a 32px avatar above a square image; LinkedIn uses a 48px avatar with role line and timestamp with globe icon; Threads mimics X chrome with Meta's typography; Facebook uses a 40px avatar with 'shared a post' language. We update the mockups when platforms ship visible redesigns. Fonts use web-safe stacks that match each platform's system fonts (SF Pro on Apple systems, Segoe UI on Windows, Roboto on Android) — so the rendering on your machine is the rendering someone browsing from the same OS will see.
Does it export as a real image file?+
Yes. The Export PNG button renders the platform card to an HTML5 canvas using html2canvas (loaded on-demand from cdnjs) and downloads a PNG file at native retina resolution (2x pixel density). The exported image has the exact same visible pixels as what you see on screen — suitable for decks, client presentations, Twitter threads, design reviews. There's also a Copy to Clipboard option that writes the PNG directly to your clipboard so you can paste into Slack, Figma, Keynote, or a chat without saving a file first.
Is my avatar uploaded anywhere?+
No. Avatars are read into a browser File API object and rendered directly onto the mockup card. Nothing uploads to a server, nothing logs, nothing persists after you close the tab. This is deliberate: mockups often involve real team photos, client logos, prototype brand marks, or unreleased product imagery — transmitting that to a third-party service would be a leak risk. Everything — avatar, handle, post text, attached image, exported PNG — stays on your machine. You can verify with DevTools Network tab: zero requests leave your browser after initial page load.
What platforms are supported and which ones aren't?+
Supported: X (Twitter), Instagram (feed post with single image), LinkedIn (personal post), Threads (text + optional image), Facebook (personal post). Not yet supported: TikTok (short-form video platform — a static mockup misses the point), YouTube Shorts (same reason), Pinterest (product-card design is meaningfully different), Mastodon / Bluesky (chrome varies by client/instance, so a canonical mockup is ambiguous), Discord (private channels not public posts). We cover the five platforms that marketers and designers most commonly pitch posts for; for video platforms, screenshot mockups aren't the right tool.
Can I use real celebrity avatars or brand logos?+
The tool allows any image upload — but uploading a brand logo or a real person's photo and publishing the resulting mockup can raise right-of-publicity, trademark, or defamation issues depending on context. For design comps, internal decks, and private critique, it's generally fine. For public posts — especially ones that attribute statements or opinions to a real person or brand — be cautious. A satirical mockup clearly labeled as satire is usually protected; a realistic mockup that a viewer could mistake for a genuine post is riskier. We don't police the tool's content, but we do recommend considering how the exported image will be used before publishing.
Can I mock up a post that includes my actual profile photo and handle?+
Yes. The mockup form has fields for username, handle, avatar image (uploaded), and post content (text plus optional image). The result renders as a pixel-accurate copy of the platform default theme, ready to screenshot or export as PNG. Twitter, Instagram, LinkedIn, and Threads themes are supported. The mockup is for presentation and design preview use only; never use it to fake real posts from real people.
Do the mockups update when platforms change their UI?+
The mockup themes track each platform default desktop UI as of the last quarterly review. Platforms occasionally roll out design changes (Twitter to X rebrand, Instagram nav restructure) that take a release cycle to mirror. If a current design feature is missing from your output, the version dropdown lets you select the most recent supported design for each platform.
Built by Derek Giordano · Part of Ultimate Design Tools
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