Free social media tools

Preview posts, count characters, write captions with AI, and create threads — all free, no signup required.

Tools tagged “mastodon”

Preview your Mastodon posts before publishing.

Compose Mastodon threads with live preview.

Count characters for Mastodon posts (toots).

Add invisible characters so Mastodon preserves your toot line breaks.

Convert text to Unicode bold, italic, bold italic, and underline for Mastodon toots.

Check if your images meet Mastodon's size requirements.

Check if your image meets the Mastodon profile photo size requirement (400x400).

Check if your image meets the Mastodon header size requirement (1500x500).

Check if your image meets the Mastodon post image size requirement (1920x1080).

Check if your image meets the Mastodon post image (square) size requirement (1080x1080).

Check if your image meets the Mastodon post image (portrait) size requirement (1080x1350).

Check whether a Mastodon username is taken.

Drop in one picture and get every Mastodon size back, cropped to fit.

Find the best times to toot on Mastodon.

Generate fancy fonts for Mastodon — bold, italic, script, small caps, and 14 more styles you can copy straight into your bio or caption.

Turn a one-line brief into ready-to-post Mastodon copy, written to the platform’s length and tone.

Write a Mastodon bio that fits the character limit and actually says something.

Get relevant Mastodon hashtags generated from your actual caption, in the count Mastodon rewards.

Draft Mastodon replies that sound like a person — for FAQs, objections, and polite disagreement.

Paste a Mastodon caption and get it back sharper — same meaning, better wording, written to how Mastodon actually reads.

Ten Mastodon username ideas, generated inside Mastodon’s real handle rules rather than a generic name list.

Turn one idea into a Mastodon thread of 5 to 8 numbered posts, each inside the per-post character limit and each able to stand on its own.