7 Things Wrong With Most Online Case Converters (And What to Use Instead)

'of']); const titleCase = str => str.toLowerCase().split(' ').map((word, i) => i === 0 || !SMALL_WORDS.has(word) ? word[0].toUpperCase() + word.slice(1) : word ).join(' '); // "How to Write a Blog Post for the Web" ✅

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## [](#flaw-2-sentence-case-destroys-proper-nouns)Flaw 2: Sentence Case Destroys Proper Nouns

// WRONG — basic regex approach const sentenceCaseBasic = str => str.toLowerCase().replace(/(^\s*\w|[.!?]\s*\w)/g, c => c.toUpperCase()); // "steve jobs founded apple" — all proper nouns gone ❌

// BETTER — preserve already-capitalized words const sentenceCaseSmart = str => { const words = str.split(' '); return words.map((word, i) => { if (i === 0) return word.charAt(0).toUpperCase() + word.slice(1).toLowerCase(); // Preserve words that were intentionally capitalized (proper nouns) if (word === word.toUpperCase() && word.length > 1) return word; // abbreviations if (/^[A-Z]/.test(word) && i > 0) return word; // already capitalized return word.toLowerCase(); }).join(' '); };

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## [](#flaw-3-no-companion-tools)Flaw 3: No Companion Tools

Every blogger needs: case converter + slug generator + space remover — in the same workflow. Switching between three tools wastes time.  

// All three in one utility const textTools = { titleCase: (str) => { /* ... / }, sentenceCase: (str) => { / ... */ }, slugify: (str) => str.toLowerCase().trim() .replace(/[^\w\s-]/g, '') .replace(/[\s_]+/g, '-') .replace(/--+/g, '-'), removeSpaces: (str) => str.replace(/ +/g, ' ').trim() };

// One input, multiple outputs const title = "What Is a URL Slug? How to Create SEO-Friendly Slugs!"; console.log(textTools.titleCase(title)); // "What Is a URL Slug? How to Create SEO-Friendly Slugs!" console.log(textTools.slugify(title)); // "what-is-a-url-slug-how-to-create-seo-friendly-slugs"

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