Free Spell Checker
Check spelling online without a dictionary-matcher mangling your terminology. Paste up to 250 words of academic or scientific writing: misspellings and typos get fixed and listed, your text is identified as American or British English, and mixed spelling conventions are made consistent, while author names and technical terms are deliberately left untouched.
Sent to our server only to run this tool; we keep no copy of your text.
0 / 250 words
Trusted by researchers publishing in
How to check your spelling online in three steps
Paste your text
Up to 250 words per check, from any academic document: an abstract, a paragraph of your thesis, a scholarship essay or an email to a supervisor.
Typos fixed, terminology respected
The spelling check fixes misspellings and real-word typos it can verify from context, reports your detected spelling convention, and refuses to touch names and technical terms it does not recognize.
Review the list and copy the result
Every fix is listed beside your original spelling with a short note. Scan the list, confirm nothing field-specific was touched, and copy the corrected text.
Why researchers use this spelling checker
Safe for terminology
Unfamiliar technical terms, species names, drug names and author names are left exactly as written. No more heteroskedasticity being corrected into something else.
American or British, detected
The checker names the spelling convention your text uses and aligns any stray minority spellings to it. Consistent text is never converted.
Real-word typos caught
Dictionary checkers accept form for from because both are words. This checker reads the sentence, so context typos surface too, fixed only when the intended word is unambiguous.
Every fix listed
Corrections appear beside your original wording with a one-line note, so you can verify each one instead of trusting a silently cleaned text.
Spell checking academic writing is its own problem
Generic spell check was solved decades ago; academic spell check was not. The difference is vocabulary. A research document is full of words that no consumer dictionary contains: method names, taxa, compounds, statistical terms, surnames from every language on earth. A dictionary-based checker responds to these in one of two bad ways: it buries you in false flags until you stop reading them, or it autocorrects a term you spelled correctly into a common word you did not write. Both failure modes are worse than the typos it catches.
The checker on this page inverts the priorities. It reads your sentences in context, which lets it catch the typos dictionaries cannot see, the real-word errors like form for from and there for their, while treating unfamiliar terminology as sacrosanct rather than suspicious. Every correction it does make is listed beside your original spelling, so the final authority on every word stays where it belongs, with you.
The second academic-specific problem is spelling conventions. Journals require consistent American or British English, and documents assembled over months from notes, quotes and collaborators' comments almost always drift. The checker detects your majority convention and aligns the strays to it. When a journal requires the convention you did not write in, the US UK English converter switches the whole text in one pass. And because spelling is only one layer of mechanics, the grammar checker covers agreement, articles and sentence construction, while the punctuation checker handles the commas and apostrophes.
For a complete manuscript, checking 250 words at a time stops being the right tool. The ProofreaderPro editor proofreads whole documents, spelling included, with tracked changes you accept or reject, and the same respect for your terminology that this free checker demonstrates.
Spell checker FAQs
What does this spell checker fix, and what does it leave alone?
How does the American versus British English detection work?
What is the difference between a spell check and a grammar check?
Can it convert my whole text between American and British spelling?
Spelling clean. Now check everything else.
Typos are the visible errors; agreement, articles and phrasing are the ones reviewers actually judge. The ProofreaderPro editor proofreads your complete document with tracked changes, terminology respected, every edit yours to approve. Free to try.
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