Spell Checker
Check text for common spelling errors and get suggestions.
Check text for common spelling errors and get suggestions.
This free Spell Checker from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the Spell Checker
- Paste your text into the input box above.
- Pick any options the tool offers (case, format, separator).
- Click the action button - the result appears instantly.
- Copy the cleaned-up text to your clipboard, or download it as .txt.
What you can do with the Spell Checker
- Prepare copy for blog posts, emails and social media.
- Edit student assignments before submission.
- Hit the word or character limit for ads, meta tags or microcopy.
- Clean up messy text pasted from PDFs or web pages.
Why use KX Toolkit's Spell Checker
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
Paste plain text rather than rich-text from Word - it avoids hidden formatting characters that throw off counts.
Related Text Analysis Tools
If you find this tool useful, explore the full Text Analysis Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
How does the spell checker know whether a word is correct?
It compares each word against a dictionary, ignoring proper nouns and capitalised acronyms. Words not in the dictionary get flagged. Suggestions come from edit-distance algorithms that find dictionary words a few keystrokes away from yours, ranked by frequency. Modern spell checkers also use context to choose between homophones like there, their, and they're.
Will it flag correctly spelled but wrong words?
Pure spell checkers will not - if you typed form when you meant from, both are dictionary words and the spell checker passes both. Grammar and context-aware checkers can catch some of these, but not reliably. Slow proofreading remains the only sure way to catch real-word errors. Reading the text aloud helps because the ear catches what the eye misses.
How do I add custom words to the dictionary?
Most spell checkers let you add a word to a personal dictionary, which then stops triggering errors for that word in future checks. This is useful for proper names, brand terms, technical jargon, and slang specific to your domain. Avoid adding misspelled words by accident - once added, the checker will never flag that exact string again.
Does it check non-English text?
Multi-language spell checkers maintain separate dictionaries per language, and you can usually switch the active language with a dropdown. Mixed-language documents - say English with French quotes - confuse most checkers because they assume a single language at a time. For mixed content, run the checker once per language or use a tool that supports per-paragraph language hints.
How are technical or scientific terms handled?
Domain dictionaries vary. Medical, legal, and scientific spellcheck packs exist as add-ons and cover terminology not in the general dictionary. Without those packs you get many false positives on terms like azithromycin or jurisprudence. If you write in a specialty field regularly, install the appropriate dictionary or maintain a personal word list.
What is the difference between spell-check and autocorrect?
Spell-check flags errors and waits for you to choose a correction. Autocorrect replaces a flagged word automatically with what it thinks you meant, sometimes without warning. Autocorrect is faster but causes embarrassing edits when it guesses wrong, especially with names or domain terms. Most professional writing tools default to spell-check and leave autocorrect off.
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