English Case Converter with Spell Check — Tutorial

Convert English text into five common case formats. When you click a convert button, a local Hunspell dictionary checks spelling and underlines likely misspellings in red. Everything runs in your browser—nothing is uploaded.

Features

• Five modes: Title Case, Sentence case, UPPERCASE, lowercase, Capitalize Words.
• Space cleanup: Merges consecutive spaces and trims before conversion.
• Spell check: Loads nspell (MIT) + dictionary-en on first convert; red underlines for misspellings; conversion still runs.
• Auto-copy: Shows the result below and tries to copy it to the clipboard.
• Local-only: Text and dictionary stay in the browser.

Use Cases

• Headlines: Turn hello world from our team into Title Case Hello World From Our Team.
• Body copy: Sentence-case emails and docs; standalone i becomes I.
• Proofread before paste: Spot Helo or recieve while converting, fix, then copy.

How to Use

1. Open the English Case tool and paste or type English in the short input (at least one letter required).
2. Click a convert button:

• Title Case: Capitalizes first/last words and major words; keeps middle prepositions/articles (the, of, and, …) lowercase.
• Sentence case: Capitalizes the first letter of each sentence (also after .!?); standalone i → I.
• UPPERCASE / lowercase: Affects Latin letters only.
• Capitalize Words: Capitalizes the first letter of each word (digit-led tokens like 1st unchanged).

1. If spell check finds issues, red underlines appear in an overlay on the input—click the overlay to edit again. Conversion and copy still proceed.
2. Review the result below (auto-copy attempted). Click Reset to clear input, spell overlay, and output.

Spell Check Notes

• The first convert downloads ~550KB of local dictionary data (dictionary-en), then caches it in the browser.
• Only English-letter words are checked; tokens with digits, CJK, and punctuation are skipped.
• Results are indicative (US word list); proper nouns, acronyms, and neologisms may be flagged—use your judgment.

Notes

• Digits-only, CJK-only, or punctuation-only input cannot convert—you’ll see “Nothing to convert”.
• Recommended max 500 characters per input.
• Review output when numbers, acronyms, or non-Latin characters are mixed in.
• Refreshing the page clears input and results.

Related Keywords

English case converter, Title Case, Sentence case, spell check, transcribe, Hunspell, Sanye Hub, online tools