Free tool
Social media post preview generator
Paste your caption, upload your image, and see exactly how the post will render on Instagram, X, Threads, LinkedIn, or Facebook — before you publish.
175 / 2,200
Everything is rendered locally in your browser. No image or caption is uploaded to our servers. Screenshot the preview for client approvals.
your_brand
···Upload or paste an image URL
1.2K likes
your_brandBuilt in public and shipped today 🚀
Three things made the difference:
— tight feedback loop
— one shared calendar
— scheduling with @postlinkapp
#buildinpublic #socialmedia
Next step
Preview ready? Publish the real thing with PostLink.
Connect accounts and schedule this exact post across every platform — one upload, one dashboard.
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FAQ
Post preview generator — common questions
What is a social media post preview generator?+
A post preview generator shows you how your caption, image, and formatting will render inside the real social media app before you actually publish it. PostLink supports Instagram, X (Twitter), Threads, LinkedIn, and Facebook mockups.
Is this Instagram post generator free?+
Yes. PostLink Post Preview Generator is 100% free, runs entirely in your browser, and requires no sign-up. We built it as a companion to our social media scheduler.
Are my images uploaded to your servers?+
No. All previews are rendered locally in your browser. Captions, images, and handles never leave your device.
Can I download the preview as an image?+
Right now, take a screenshot of the preview card — it's pixel-perfect for client approvals and social ads. A direct PNG export is on the roadmap.
Does the preview match the real Instagram app?+
Yes. Hashtags, @mentions, line breaks, and the caption "more" truncation all render the way they do in the live feed. Use this to spot problems (broken hashtag chains, bad line breaks, over-long captions) before your post goes live.
Why is the caption character count important?+
Each platform has a hard character limit — Instagram 2,200, TikTok 2,200, X 280, Threads 500, LinkedIn 3,000, Facebook 63,206. The counter turns red if your caption exceeds the platform's limit so you can trim before posting.
Can I use this preview for client approvals?+
Yes — screenshotting the preview is one of the most common use cases. Agencies use social post mockup tools to get sign-off from clients without waiting for a full social media management tool login.
What is the difference between this and a social media scheduler?+
A preview generator only renders a mockup. A scheduler (like PostLink) actually publishes your post automatically at a time you pick. Use the preview to validate, then schedule with PostLink.