Paste your X post to check the 280-character limit and count hashtags and mentions before you publish.
X limits
Character counts update as you type
X posts move fast, so every character has to earn its place. The 280-character limit rewards concise hooks, clear opinions, compact announcements, and short calls to action that can be understood without extra context.
Use this X caption length checker to tighten copy before publishing a launch post, product update, founder note, or campaign teaser. It helps you account for hashtags, mentions, links, spaces, and punctuation while keeping the post easy to read in the timeline.
Lumafly's Free X Character Counter helps you publish with confidence. Use this free X character counter to check X (Twitter) post character limits before you publish. Count characters, hashtags, and mentions against the 280-character standard post limit.
X
280 characters per standard post
Full post shown in timeline
Add your X caption including hashtags and mentions.
Character, word, hashtag, and mention counts update as you type.
See whether your post fits X's 280-character limit with live remaining character counts.
Use this free x character counter for organic posts, paid social ads, creator briefs, launch captions, giveaways, product drops, and short-form video descriptions. It helps you keep the hook visible, confirm your character count, and avoid last-minute edits inside the publishing flow.
Character limits are only one part of a strong post. Put the key message early, keep hashtags intentional, and check the preview before scheduling so the first line still makes sense when the platform truncates the caption.
The best captions usually combine one clear idea with enough context for a viewer to act. If your caption is long, structure it with a strong first sentence, useful details in the middle, and a direct CTA near the end. If it is short, make sure the hook still explains why the post is worth watching, saving, or clicking.
The first line should communicate the idea, benefit, or tension fast. Do not save the most important context for the hidden part of the caption.
Hashtags can add context, but too many tags can make a caption harder to read. Prioritize relevance over volume.
Mentions, hashtags, links, emojis, punctuation, and spaces all affect readability and may count toward character limits.
A caption for comments should ask a clear question. A caption for clicks should make the CTA obvious. A caption for saves should promise useful value.
Everything you need to know about X post limits
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