Social Media Character Counter

What this character counter does

This free social media character counter tells you, in real time, how long your text is and whether it fits the platform you are writing for. As you type or paste a caption, bio, tweet, or description, it tracks the character count, word count, sentence count, and line count, then compares your text against the character limit of every major network. When you go over a limit the row turns red and shows exactly how many characters you need to trim, so there is no guessing before you hit publish.

Character limits for every platform

Each network enforces its own maximum length, and they vary wildly. Here are the current limits this tool checks against, from the tightest to the most generous:

• TikTok bio: 80 characters
• YouTube title: 100 characters
• Instagram bio: 150 characters
• X / Twitter post: 280 characters
• Bluesky post: 300 characters
• Pinterest pin description: 500 characters
• Threads post: 500 characters
• Instagram caption: 2,200 characters
• TikTok caption: 2,200 characters
• LinkedIn post: 3,000 characters
• YouTube description: 5,000 characters
• Facebook post: 63,206 characters

These numbers are the hard caps, meaning the platform will not let you post beyond them. In practice you almost never want to write to the ceiling. Feeds truncate long text behind a "see more" link, and shorter, punchier copy tends to hold attention better anyway.

How to use the tool

Type or paste your text into the box at the top. The five summary tiles update instantly with characters, characters without spaces, words, sentences, and lines. Below them, every platform shows a used-versus-limit count, the number of characters you have remaining, and a small progress bar that fills as you write. When a bar goes amber you are within ten percent of the cap, and when it goes red you have exceeded it. Use the copy button to grab your finished text and the clear button to start over.

Why character limits matter

Hitting a character limit at the wrong moment is a small disaster. A tweet that runs one character too long will not send, and a YouTube title that exceeds 100 characters gets chopped mid-word in search results. Even when you are safely under the limit, the visible preview length matters more than the maximum. Instagram only shows about the first 125 characters of a caption before the "more" link, and Facebook trims a post at roughly 480 characters. That means the opening line of every post carries most of the weight. Writing within the visible window, not just the hard cap, is what keeps your hook, your offer, and your call to action in front of people who never tap to expand.

Tips for writing concise captions

Lead with the most important idea. Front-load your hook and any call to action into the first line so they survive truncation. Cut filler words like "just," "really," and "very," and turn long sentences into two short ones for easier reading on mobile. Move hashtags to the end or into the first comment so they do not eat into the readable part of your caption. If you are repurposing one message across platforms, write the long version first for Instagram or LinkedIn, then use this counter to trim a tight variant that fits inside 280 characters for X and 300 for Bluesky. Keeping a small buffer below each limit also protects you when a platform counts emojis or links as more than one character.