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Capital Letter Counter

Count uppercase letters and find where the shouting is.

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uppercase letters

Words written entirely in capitals

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Quick Tool Overview

The Capital Letter Counter reports how many uppercase letters a text contains, what share of all letters that is, and which words are written entirely in capitals. It is the check to run on a subject line or a headline before a spam filter or an ad platform runs it for you.

What it does
Counts uppercase letters and finds all-caps words
You give it
A subject line, headline, advert or document
You get back
The capital count, its percentage, and every all-caps word
Best for
Email subject lines, ad copy and style-guide compliance
Text Tools Free, unlimited use No sign-up Runs in your browser

About the Capital Letter Counter

Capitals carry weight, and too many of them is a real problem in places you get graded on. Email spam filters score a subject line with a high proportion of capitals. Ad platforms reject headlines in all caps. Style guides cap the number of capitalised words in a headline. This tool measures what you actually have.

You get the number of uppercase letters, the number of lowercase letters, the percentage of letters that are capitals, and a list of every word written entirely in capitals. That last list is the useful one for a marketer: it separates the deliberate acronyms from the words that were shouted by accident.

Key features of the Capital Letter Counter

Percentage, not just a count

The share of letters that are capitals is the figure spam filters and style guides actually react to.

All-caps words listed

Every fully capitalised word is pulled out, which separates deliberate acronyms from accidental shouting.

Lowercase shown alongside

Both halves of the case balance are reported, so you can see the whole picture in one pass.

Works beyond English

Accented Latin, Greek and Cyrillic capitals are all recognised, so É and Ж count as capitals.

Spam-risk guidance

The result is compared against the thresholds email filters commonly use, so the number means something.

How to use the Capital Letter Counter

  1. 1

    Paste your text

    A subject line, a headline, an ad or a whole document.

  2. 2

    Read the capital count

    The total number of uppercase letters and their share of all letters.

  3. 3

    Scan the all-caps words

    Every word written entirely in capitals is listed, so acronyms and accidental shouting are easy to tell apart.

  4. 4

    Fix what needs fixing

    Use the Lowercase Converter or Sentence Case Converter on anything you want to tone down.

Frequently asked questions

For an email subject line, spam filters start reacting above roughly thirty per cent capitals or at any subject that is entirely uppercase. For body copy, ordinary English sits between two and five per cent.

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