Preview your Mastodon post
See how your toot will appear on Mastodon. Test your text and images before posting to the fediverse.
Enter your Mastodon post text and optionally add an image to preview how your toot will look.
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Frequently Asked Questions
What is the Mastodon character limit?
Is this free to use?
Can I preview with images?
Does it support custom instances?
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Free Mastodon Post Preview and Toot Mockup Tool
Use this Mastodon post preview to test a toot with profile details, text, media and sample interactions before publishing. Review the layout in a Mastodon-style card, prepare the canvas and download a mockup without signing in to an instance.
Preview your Mastodon toot before posting
Write or paste the post and the Mastodon preview updates in real time. Add the display name, handle, profile image, verification, optional media and sample engagement to create a useful fediverse mockup. It can be used for individual posts, community announcements and campaign approval.
- Enter the Mastodon post or toot you want to review.
- Add the account details and optional image.
- Check the copy, line breaks and media inside the feed card.
- Choose the canvas style and download the preview.
Review a fediverse post for different readers
Mastodon is decentralized, and instances or clients may use different limits and presentation details. A standard preview still helps you check whether the post gives enough context, paragraphs are readable and media supports the message. Plan any content warning and image description separately before publishing the real post.
- Instance context
- Write the post so readers from another server can understand the subject without local assumptions.
- Content warnings
- Decide whether the real post needs a clear content warning, even though this mockup does not add one.
- Image descriptions
- Prepare useful alt text for each image before uploading it to your Mastodon instance.
- Line breaks
- Use paragraphs to support reading without making a short post feel fragmented.
Choose a canvas for the Mastodon mockup
Keep the post on a transparent canvas or add a color or gradient behind it. Select square, horizontal, portrait or vertical story dimensions, then adjust corner and shadow styles for the document where the preview will appear. These settings are useful for community guides, presentations and content plans.
Download a Mastodon post preview
Export the Mastodon post mockup as a PNG for an announcement review, moderation guide, campaign plan or client presentation. The tool works without an account and never connects to your home instance. It cannot publish, federate or edit a real post.
Limits of a Mastodon post preview
This generator shows a standard static card. It cannot reproduce every Mastodon client, instance setting, custom emoji, poll, content warning or federated interaction. Use it to review copy and visual presentation, then confirm the final character limit, accessibility fields and layout on the instance where you will publish.