Spell Checker

The Spell Checker compares English-looking words in your text with a browser-loaded common-word dictionary and highlights entries it does not find. For a flagged word, it may show close candidates from that same dictionary.

This is a limited spelling aid, not a comprehensive dictionary, grammar system, language assessment, or authoritative editor. Correct names, specialist terms, dialect forms, newer words, and uncommon vocabulary may be flagged. A word appearing in the dictionary also does not prove it is the right word for the sentence.

Misspellings can distract readers and make names, instructions, search terms, or professional messages harder to use. A quick local pass can catch common typing errors before publication.

Dictionary comparison is only one part of proofreading. It cannot reliably detect correctly spelled substitutions such as “form” for “from,” judge grammar, verify proper nouns, or resolve regional and house-style preferences. Important content still needs contextual review.

• Find words absent from a common English list
• Review a few close spelling candidates
• Optionally ignore likely mid-sentence names
• Perform a private first proofreading pass

On first use, the component fetches /data/en-words.txt, lowercases its nonblank entries, and adds a small set of common web and technology terms. The checker scans sequences of ASCII letters and apostrophes, ignores one-character tokens, strips apostrophes at token edges, and compares lowercase forms with the Set.

With the default option enabled, a capitalized word after the beginning of the text may be skipped unless the preceding character is a period, exclamation point, question mark, or newline. Repeated instances of one letter are also skipped. These rules reduce some noise but can also hide actual errors.

• Wait for the local dictionary to load
• Paste or type the draft
• Choose whether to ignore mid-sentence capitals
• Review each word and suggestion in context

A flagged word means its lowercase form was not found in the loaded list after limited token cleanup. It does not mean the word is definitively misspelled. If no suggestions appear, the dictionary simply had no qualifying close candidate.

Suggestions must begin with the same first letter, differ in length by no more than two characters, and have an edit distance of one or two. They are sorted by distance and then alphabetically, with up to five returned. This ranking does not consider sentence meaning or word frequency.

A spelling pass can reduce avoidable errors, especially when paired with reading aloud and checking names against trusted sources. Local processing also keeps drafts out of a server-side proofreading service.

Spelling conventions vary across American English, other English varieties, professions, communities, and individual names. This tool must not be used to judge intelligence, language proficiency, disability, education level, or the legitimacy of a dialect.

Suggestions use standard character edit distance: the minimum number of single-character insertions, deletions, or substitutions needed to change one word into another. Only dictionary candidates with distance one or two are eligible.

The implementation filters candidates by matching first letter and a maximum length difference of two before calculating distance. It does not assign a correctness probability, grammar score, reading level, or educational evaluation.

edit distance

Minimum insertions, deletions, or substitutions between two strings

candidate

A dictionary word passing the first-letter and length filters

Use the Spell Checker to surface possible errors, then confirm every decision with context and trusted references. Its compact dictionary and mechanical suggestions are useful aids, not authoritative language judgments.