A social media post mockup renders your draft text and images exactly as they'll appear on Instagram, Twitter/X, Facebook, or LinkedIn — so you spot truncated headlines, awkward image crops, or unflattering previews before publishing.
This guide covers what to check, platform-specific preview rules, and how to use mockups in client approval workflows.
Mockup Social Media Posts — Free
See your post on Instagram, Twitter, FB, LinkedIn before publishing.
Why Mockups Matter
- Image cropping varies — Instagram crops square, Twitter to 16:9, LinkedIn to 1.91:1.
- Text truncation — Twitter shows ~230 chars before "show more"; LinkedIn ~140; Instagram captions show 125 in feed.
- Hashtag placement — End vs inline reads differently per platform.
- Link previews — Some platforms generate them, others don't.
- Profile context — Verified badge, handle, time stamp affect first impression.
Platform Display Rules
| Platform | Image crop | Visible text | Hashtag norm |
|---|---|---|---|
| Instagram feed | 1:1 default | ~125 chars | End or first comment |
| Instagram Story | 9:16 vertical | Sticker-only | Inline minimal |
| Twitter / X | 16:9 (linked image) | ~230 chars before "show more" | 1-2 inline |
| Facebook feed | 1.91:1 (link), 1:1 (post) | ~250 chars | Rare/optional |
| 1.91:1 | ~140 chars then "see more" | 3-5 end of post | |
| Threads | 1:1 or carousel | 500 char total | Inline minimal |
What to Check in a Mockup
- First-line hook — Will it pull readers past "show more"?
- Image crop — Critical content visible after platform crop?
- Link preview — OG image and title look right?
- Tags — Mentioned accounts visible and tagged correctly?
- Mobile vs desktop — Most users see mobile; check that view first.
- CTA visibility — Is your action prompt above the truncation line?
- Brand consistency — Colors, fonts, voice match your other posts?
Use Cases
- Client approval — Show mockups instead of just copy in a doc.
- Team review — Faster feedback when everyone sees the actual rendering.
- A/B comparison — Mock 2-3 versions side by side.
- Pitch decks — Show what social posts will look like for a campaign.
- Portfolio — Demonstrate social media work without exposing real accounts.
Common Mistakes Mockups Catch
- Headline cut off mid-word at "show more".
- CTA below the fold — invisible without expanding.
- Logo cropped out of square Instagram preview.
- Text overlay illegible on dark/busy image.
- Link preview shows old OG image (cache issue).
- Hashtag count mismatched to platform norms.
How to Use the Tool (Step by Step)
- 1
Pick Platform
Instagram, Twitter, Facebook, LinkedIn.
- 2
Add Profile Info
Avatar, name, handle, verified badge.
- 3
Paste Post Text
See truncation indicators.
- 4
Upload Image
Preview platform-specific crop.
- 5
Export Preview
PNG to share with team or client.
Frequently Asked Questions
Can I post directly from the mockup?+−
No — mockups are visual previews only. You still publish through the platform or your scheduler.
Does it preview Stories and Reels?+−
Most modern mockup tools cover feed, Story, and Reel formats.
Can I show my mockup as a real Twitter screenshot?+−
Yes — export PNG. Just don't use it to fake real posts (bad practice).
Will it match the actual rendering 100%?+−
Very close, but platforms tweak fonts and spacing. Mockups get you 95% of the way.
Is mockup data saved?+−
Most tools are session-only — close the tab and the draft is gone.
Mockup Social Media Posts — Free
See your post on Instagram, Twitter, FB, LinkedIn before publishing.
Open Post Mockup ->Related Guides
Banner & Poster Maker
From web ads to print posters — master dimensions, design principles and export formats for every platform
Social Media Image Resizer Guide
How to resize images for Instagram, Facebook, Twitter, LinkedIn, YouTube — auto-crop, ratios, and multi-platform export.
Thumbnail Maker
Design stunning thumbnails that boost your CTR across YouTube, Facebook, LinkedIn and beyond