YB
Sharing some thoughts on the future of social media…
Page title
example.com
💬 42
🔁 18
❤️ 128
$ previewer run threads-post
Threads Post Preview Tool
Write your post, add an image or link, and see exactly how it renders on Threads — character limit, link preview, and dark mode included. Free, no login.
500 characters left
Click or drop an image here
Click or drop an image for the link card
// text saves to this browser only — images are never uploaded anywhere
// why this matters
Small things that break a Threads post.
The 500-character wall
Threads caps posts at 500 characters. The live ring counter shows exactly how much room you have left as you type.
Image crop and fit
Threads displays images in a feed-friendly format. Upload yours here to see how it will be displayed before you post.
Light vs. dark mode
Many users browse Threads in dark mode. Toggle the preview to make sure your image and text still read well on dark backgrounds.
// what's inside
Everything you need to check before you post.
Live character ring
A real-time 500-character counter, so you always know your limit as you type.
Image upload preview
Attach an image and see it rendered inside the mockup at the same size and position as a real Threads post.
Link preview
Fill in URL, title, and upload an image to preview the link card as it would appear in your feed.
Light / dark mode
Switch instantly between Threads' light and dark display modes without leaving the page.
Download the mockup
Export your preview as a PNG to share with a client or teammate for approval.
No login, no posting
Nothing here connects to Threads. It's a private, local mockup — nothing is ever published for you.
// how it works
Three steps, one polished post.
$ write-your-post // watch the character ring as you go
$ add-an-image-or-link // optional, drag and drop or click
$ check-light-and-dark // then copy it into Threads
$ ▍
// writing tips
Posts that get engagement.
Hook in the first line
The first line is what shows in the feed preview. Put the most compelling statement right at the start.
One clear idea per post
Threads works best for focused, single-idea posts. Use the preview to check that your message isn't getting lost.
Check image readability
If you're posting text on an image, make sure it's readable in both light and dark modes. Use the toggle to verify.
Keep links clean
The link preview shows title and image. Make sure both match your message before you post.
// faq
Questions, answered plainly.
What is the character limit for a Threads post?
Threads posts are limited to 500 characters. This tool counts characters live and warns you when you go over the limit.
Can I preview an image with my Threads post?
Yes. Upload an image and it will appear inside the mockup exactly where it would in a real Threads post, so you can check the crop and composition.
Can I preview a link on Threads?
Yes. Toggle to link mode and fill in the URL, title, and upload an image to see how the link preview will render in the feed.
Does this tool post to Threads for me?
No. This is a preview-only tool. It never connects to your Threads account and never publishes anything on your behalf.
Can I see how my post looks in dark mode?
Yes. Use the light/dark toggle above the preview to check how your post renders in both of Threads' display modes.
Is my post text or image stored anywhere?
Your draft text is saved only in your own browser's local storage so it survives a refresh. Uploaded images are not saved and nothing is sent to a server.