Headline Checker

Audit social media headlines for Twitter, LinkedIn, Facebook, or Instagram with instant length checks and readability tips.

Input

We analyze characters, words, emoji, and punctuation instantly.

Applies the correct character limits and heuristics for each social network.

Warn me when emoji volume might hurt professional channels.

Use this free Headline Checker to check your headlines for social media optimization.

About the Headline Checker

The Headline Checker helps social managers, copywriters, and lifecycle marketers keep headlines, ad variations, and newsletter subject lines within each platform's sweet spot. It mirrors how feeds truncate text, counts emoji and punctuation, surfaces all-caps or low-energy copy, and warns when adding a branded domain will push you past the limit.

How the headline checker works

The checker trims your headline, then counts characters with Array.from, so an emoji or astral character counts once instead of as two UTF-16 units. Words come from splitting on whitespace runs; emoji are matched with the Unicode \p{Extended_Pictographic} property. Scoring starts at 100 and subtracts against the chosen platform's profile: 20 below the ideal minimum, 15 above the ideal maximum, 35 past the hard cap (280 on X, 220 LinkedIn, 150 Instagram, 100 Facebook), 10 for excess words, and 5 each for heavy emoji, repeated ! or ?, and ASCII uppercase above 60%. Previews truncate every platform at its cap with a trailing ellipsis.

Key Features

Channel-aware scoring keeps you inside each network's ideal range and warns if the copy would be truncated.
Emoji, punctuation, and all-caps detection ensures headlines stay readable and on-brand.
Preview string mirrors what audiences will see, including any branded domain you typed in.
Runs entirely in your browser, so embargoed campaigns and experiments stay private.

How to Use the Headline Checker

1

Paste your latest headline, subject line, or ad variation — include the branded domain, CTA, or coupon code so the count matches what will appear live.

2

Select the platform you plan to publish on (X/Twitter, LinkedIn, Facebook, or Instagram) so the checker applies the right character and truncation rules.

3

Toggle Flag heavy emoji usage if you want warnings for professional feeds, then click Run Tool to analyze instantly.

4

Review the counts, score, preview, and recommendations, then tighten or extend the headline until the verdict turns green.

Common Mistakes to Avoid

Pasting full paragraphs or multiple headlines at once — analyze one variation at a time for accurate scoring.
Leaving out the brand domain or CTA, then discovering the live version breaks the limit when you add it later.
Forgetting to switch the platform selector when bouncing between Twitter, LinkedIn, and Instagram results.

Example Scenarios

Shorten a Product Hunt announcement headline that mentions https://brand.com before publishing on X and LinkedIn.
Test three paid social ad variations to see which one stays within Facebook's 60-character sweet spot.
QA newsletter subject lines that include emoji and promo codes before loading them into your ESP.

See also

  • Tweet Length Checker — Once the headline is tight, check the full post body against the 280-character limit on X.
  • Meta Title Checker — Reuse the same headline as a page title and see whether it survives truncation in search results.

FAQ

Does it check multiple platforms at once?

Pick a platform, run the audit, then switch platforms to compare. Each run applies the exact limits for that network.

How accurate are the character counts with emoji?

We count Unicode code points, so emoji, accented characters, and multibyte glyphs match what social feeds measure.

Can I keep emoji-heavy Instagram headlines?

Yes. The warning toggle simply flags when emoji volume might hurt LinkedIn or Twitter performance; you stay in control.

Is any data stored?

No. Everything stays in your browser for on-device privacy.