Character Counter
Count characters instantly, with live platform limits for SMS, Twitter/X, SEO titles and more. Pro Mode adds an SMS segment calculator, multibyte language support, regex filtering, CSV bulk processing and a side-by-side comparison workspace.
How to Use the Character Counter
From a blank box to a checked, limit-safe piece of text — no signup, nothing ever leaves your browser.
Everything above runs entirely in your browser — your text is never uploaded to a server, so it stays completely private from start to finish.
Character Counter — Free Online Tool with Platform Limits
A character counter tells you exactly how many characters are in a piece of text — instantly, as you type, checked against the real limits of wherever that text is going. This one runs entirely in your browser, tracks live limits for SMS, Twitter/X, SEO titles and more, and never uploads anything you type to a server.
Most character-limit problems only become obvious after the fact — a text message that silently splits into two, a meta title that gets truncated with an ellipsis in Google's results, a bio that gets rejected at the last character. This tool exists to make the limit visible before that happens, whether the count that matters is a SMS character counter (160 for standard messages), a title tag character counter for SEO, or a character counter for Instagram captions. Pro Mode extends the same live counting into an SMS segment calculator, multibyte support for Chinese and Korean text, a regex-based text filter, and CSV bulk processing for checking many entries at once.
1Simple vs Pro — What Each Mode Includes
| Feature | Simple Mode | Pro Mode (Free) |
|---|---|---|
| Live character, word, sentence & paragraph count | ✓ | ✓ |
| Platform limit tracking (SMS, X, SEO, Instagram, etc.) | ✓ | ✓ |
| Language mode (Standard, Chinese, Korean, Arabic, Japanese) | ✓ | ✓ |
| Visual vs Raw counting mode, word frequency | ✓ | ✓ |
| Case conversion & text cleanup tools | ✓ | ✓ |
| SMS segment calculator (GSM-7 / UCS-2) | — | ✓ |
| Multibyte breakdown (characters, words, UTF-8 bytes) | — | ✓ |
| Regex filter & extract | — | ✓ |
| CSV / bulk text processing (via Upload File) | — | ✓ |
2Common Reasons People Count Characters
Character limits usually exist for a technical reason, not an arbitrary one — SMS limits trace back to the 140-byte payload of the original GSM signaling channel, and SEO title truncation comes from a fixed pixel-width budget in the search results page, not a round character number. Understanding the actual mechanic behind a limit — not just the number — is what lets you write close to it with confidence instead of guessing and checking after publishing.
3SMS Character Limits Explained
| Encoding | Single Message | Per Segment (Multi-part) | Triggered By |
|---|---|---|---|
| GSM-7 | 160 characters | 153 characters | Standard Latin letters, numbers, basic punctuation |
| UCS-2 (Unicode) | 70 characters | 67 characters | Any emoji, curly quote, or non-Latin character |
The switch between the two encodings is all-or-nothing: if even a single character in the message falls outside the GSM-7 set — one emoji, one auto-corrected "smart" quote — the entire message switches to UCS-2, not just that character. That's why a message that looks like it should fit comfortably in 160 characters can silently split into two or three billed segments the moment a stray emoji gets added.
4Why Character Counts Can Differ Between Tools
Not every character counter counts the same way, and the difference isn't a bug — it's a choice about what actually gets measured. Visual mode uses grapheme clusters, meaning it counts what a person actually sees as one character: an Arabic letter with its diacritic mark counts as one, and a multi-part flag or family emoji counts as one, matching how Microsoft Word and Google Docs report length. Raw units mode counts individual Unicode code units instead — the number that SMS billing and most database character-limit fields actually check against. Neither number is "wrong"; they answer different questions, which is why this tool keeps both available as a toggle rather than picking one silently.
Every count, platform check, and Pro feature — including CSV bulk file processing — runs entirely in your browser using JavaScript. Nothing you type or upload is ever sent to a server.
5Frequently Asked Questions
Grounded in official sources, not blog-post folklore — SMS segmentation figures come from Twilio's official SMS documentation, SEO title truncation follows Google Search Central's own guidance on title links, and Visual mode's grapheme-cluster counting uses the same Intl.Segmenter API documented on MDN.
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