Free tools to write social posts that get read

Every network has its own rules. X stops at 280 characters for standard accounts, Bluesky at 300, LinkedIn at 3,000, Instagram captions at 2,200. Feeds then fold long posts behind a "see more" link after a few lines, so the part people actually read is much shorter than the limit. Most posts that underperform do not break a rule, they just bury the point below the fold.

These tools answer those questions in seconds. The character counter checks your text against all 12 networks ProPost publishes to at once. The post preview shows roughly where the fold falls on a phone and on a desktop. The hook generator suggests opening lines when yours feels flat, and the hashtag generator proposes specific tags instead of generic ones. The formatter adds bold or italic where networks offer none, with a clear note about the trade-offs. The engagement rate calculator explains its formulas so you can compare posts fairly.

The counter, formatter, preview and calculator run entirely in your browser: what you type is not sent anywhere. The hashtag and hook generators send your text to ProPost to produce suggestions and are limited to a few uses per day per visitor so they stay free for everyone. Signing in gives you a higher daily allowance.

Where a number is an estimate, the page says so. Networks do not publish exactly where they fold a post, and the cut moves with screen size and line breaks, so the preview is a guide, not a promise.