Post Formatter
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LinkedIn Post Formatter
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LinkedIn Post Formatter
Post Formatter is a free browser extension and set of online tools for adding text formatting to social platforms that only accept plain text. It converts text into Unicode characters that render as bold, italic, strikethrough, underline, and 20+ font styles, so the formatting displays correctly on LinkedIn, X (Twitter), Facebook, Threads, Bluesky, YouTube, and Pinterest.
The extension formats text inline as you write, with keyboard shortcuts, a live post preview, Smart Paste from Google Docs / Word / Notion, draft management, a character counter, and optional AI proofreading and auto-styling (with your own OpenRouter API key).
PostTruncate is a free, browser-based social media character limit checker and post preview simulator for creators, marketers, and social media managers.
Write your post once and see exactly how it renders across LinkedIn, X, Instagram, Facebook, Threads, and TikTok — with live fold lines, character counts, and truncation markers updating as you type. No more publishing and hoping for the best.
Features include live post previews for 6 platforms, X thread splitting, SMS segment calculator with GSM-7 vs Unicode detection, ad safe zone previews for Facebook, Instagram, TikTok and Google Ads, Google SERP preview, emoji counter, invisible character detector, AI tone rewriting, and additional counters for YouTube, Pinterest, Reddit, Bluesky, Discord and WhatsApp.
Everything runs entirely in your browser. No login, no account, no data ever leaves your device. Available in 10 languages. Built by a solo developer from Assam, India.
Completely free. No signup. Works instantly at posttruncate.com.
Post Formatter PostTruncatePost Formatter's answer
You format inline instead of copy-pasting, it works across seven platforms (not just LinkedIn), and it adds 20+ font styles. AI proofreading and auto-styling run on your own OpenRouter API key, so you control both cost and data.
PostTruncate's answer:
PostTruncate is the only free tool that combines live fold-line previews, character counting, SMS segment math, and ad safe zone checking in one browser-based workspace. No account needed, no install, no subscription. Competitors either charge for these features, require signup, or only handle one platform at a time. PostTruncate does all platforms simultaneously, free, forever.
Post Formatter's answer
LinkedIn creators, founders, marketers, recruiters, job seekers and social-selling professionals who want their posts to stand out in the feed - anyone who writes regularly on LinkedIn or other text-only social platforms and wants bold headlines, cleaner structure, and a quick preview before publishing
PostTruncate's answer:
Content creators, social media managers, marketers, and founders who write posts across multiple platforms daily and need to know exactly how their content renders before publishing. Also useful for developers working with SMS systems who need accurate segment math and encoding detection.
Post Formatter's answer
A Chrome Extension (Manifest V3) written in TypeScript and React, with its UI rendered in a Shadow DOM so it doesn't clash with host-page styles. Text styling uses Unicode Mathematical Alphanumeric Symbols rather than HTML/CSS. Optional AI features call the OpenRouter API. The companion site (postformatter.com) is built with Astro, React and Tailwind CSS, hosted on Cloudflare Pages.
PostTruncate's answer:
PostTruncate is built with Astro as the core framework, with vanilla JavaScript handling all character counting, fold detection, and preview rendering client-side. No backend processing for the main tool — everything runs in the browser. The optional AI tone rewriting feature uses the Anthropic API. Available in 10 languages with built-in i18n support.
Post Formatter's answer
Post Formatter styles text inline, directly inside the LinkedIn, X, Facebook, Threads and Bluesky post box - you select your text and format it without copy-pasting from a separate website. It uses real Unicode characters (from the Mathematical Alphanumeric Symbols block), so bold, italic and 20+ other styles display correctly for every reader on any device. It also bundles the whole workflow in one place: live post preview, Smart Paste from Google Docs, a character counter, drafts, and optional AI proofreading
PostTruncate's answer:
Most character counters give you a number. PostTruncate gives you a visual preview — showing exactly where LinkedIn, X, Instagram, Facebook, Threads, and TikTok fold your post behind "…see more", live as you type. It also handles edge cases most tools ignore: SMS GSM-7 vs Unicode detection, X thread splitting, ad safe zone overlays, and invisible character detection. Everything runs client-side — no login, no data leaves your browser.
Post Formatter's answer
LinkedIn's post composer only accepts plain text, so there's no built-in way to bold a headline or italicize a key phrase. Post Formatter was built to close that gap in a single free tool - inline Unicode formatting plus the surrounding workflow (preview, drafts, character counting) that creators were otherwise piecing together from several separate sites.
PostTruncate's answer:
PostTruncate was built by Anirudha Kalita, a solo developer from Assam, India. After spending time crafting a LinkedIn post only to watch it collapse behind "…see more" at the worst possible moment, he went looking for a tool that showed fold lines visually before publishing. Finding nothing that worked the way he needed, he built one. What started as a LinkedIn fold checker grew into a full post preview simulator supporting 6 platforms, 10 languages, ad safe zones, SMS segment math, and AI tone rewriting — all free, all client-side.
PostTruncate's answer:
PostTruncate is a free tool used by individual creators, freelance social media managers and marketing professionals worldwide. As a solo-built, pre-revenue product, it does not have enterprise customers yet — but it serves anyone who writes content across LinkedIn, X, Instagram, Facebook, Threads, and TikTok needs to know exactly where their post gets cut off before publishing.
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