Free social media tools
Counters, previews, and builders that run in your browser. No signup needed.
UTM builder
Paste a URL, fill in source, medium, and campaign, and this UTM builder returns a tagged link you can copy into a post. It lowercases values, swaps spaces for hyphens, and keeps any query string the page already had, so the numbers in your analytics tool line up with the posts that produced them. Nothing you type leaves your browser.
Read moreX character counter
Type or paste a post and this counter shows how X will measure it, not how a word processor would. Links count as 23 characters, emoji and Chinese, Japanese, or Korean characters count as 2, and the bar turns red past 280. Use it to trim a post or a thread item before you schedule it, so it never fails at publish time.
Read moreLinkedIn post preview
Paste a draft and this LinkedIn post preview shows it the way the feed does: your name, the first lines, and the point where LinkedIn folds the rest behind see more. Switch between desktop and mobile widths to check that your hook survives both. Line breaks, emoji, and blank lines render as they will on LinkedIn.
Read moreSocial media image sizes
Pick a network and a format and this guide gives you the recommended pixel size and aspect ratio, with a crop preview so you can see what the feed will cut. It covers X, LinkedIn, Bluesky, Mastodon, Threads, Instagram, Facebook, and YouTube thumbnails, and it notes file size limits where they trip people up.
Read moreBluesky character counter
Paste a post and this counter measures it the way Bluesky does: in graphemes, the characters a reader sees. A family emoji built from 7 code points counts as 1, and so does an accented letter. The counter turns red past 300 and shows how much of the post is taken up by links, so you can trim before you publish or schedule.
Read moreLinkedIn bold text generator
LinkedIn posts have no bold or italic button. This generator converts the words you type into look-alike Unicode letters in bold, italic, or bold italic, which you can copy and paste into a LinkedIn post or comment. Read the caveats below before you use it: screen readers and LinkedIn search do not treat these letters as normal text.
Read moreLinkedIn character counter
Pick the field you are writing for, paste the text, and this counter checks it against the LinkedIn character limit for that field: 3,000 for a post, 1,250 for a comment, 220 for a headline, 2,600 for the About section. For posts it also marks the part readers see before see more, so you can judge length and hook at once.
Read moreCross-post length checker
Write one post and see at a glance whether it fits X, LinkedIn, Bluesky, Mastodon, and Threads. Each network counts differently: X weighs links and emoji, Bluesky counts graphemes, Mastodon counts any link as 23. This checker applies each rule side by side, so you know which version needs trimming before you cross-post.
Read moreThread splitter
Paste a long draft, pick a network, and this thread splitter breaks it into posts that each fit the limit. It splits at paragraph and sentence boundaries first, falls back to word boundaries only when a sentence is too long, and can add 1/n numbering. Copy each post, or copy the whole thread, when it reads the way you want.
Read moreMCP config generator
Enter a server name, then either a command with arguments (stdio) or a URL with a bearer token (streamable HTTP), and this generator writes the MCP config JSON for your client. It uses the right top-level key for each client, shows the file path for your operating system, and escapes paths and quotes so the file parses the first time.
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