Check Vietnamese spelling, grammar and punctuation free. Every issue underlined where it happens, with the reason attached.
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Paste Vietnamese and every issue is underlined where it happens, labelled spelling, grammar, punctuation or style, with the reason attached. Vietnamese is written in the Latin alphabet, and six tones, the two-part diacritics, classifiers, no inflection are what a checker has to get right in it. This one shows the rule each time, not just the change, so you can accept the fix, ignore it, or learn from it.
Three steps. The third is the one most checkers leave out.
Type, paste or drop in a document. Vietnamese is already selected as the language on this page; the menu above the editor also offers the variants described below. If the text turns out to be something else, the detector says so and you can change it.
Every flag is underlined in the text and listed beside it. Spelling and grammar flags are errors; punctuation and style flags are judgements, and the label tells you which is which before you decide.
Click a flag to see the fix and the rule behind it, then accept it or ignore it. Vietnamese has rules that speech does not reveal, and the reason is there so the same error is not made twice.
The parts of Vietnamese grammar and spelling where a checker has to know the language, not just the words.
Five errors Vietnamese readers notice at once, and what the checker does with each.
Việt is not Viet; hỏi and ngã (the dipping and the broken tone) are separate marks. Text typed without marks is not Vietnamese, and a wrong mark is a different word.
Sẻ (to share) against sẽ (will), nghỉ (to rest) against nghĩ (to think). Southern and central speakers merge them; the writing does not.
Trả (to return) against chả, sương (dew) against xương (bone), da (skin), gia (family), ra (to go out). Northern speech merges each set; the spelling is fixed by the word.
In a diphthong the newer school convention puts the mark on the main vowel (hoà, thuý) and older typography on the first vowel (hòa, thúy). Both are accepted; a text should keep one, and the mark must never move to a consonant or a different syllable.
Một con chó, một cái bàn, một quyển sách, một chiếc xe: the classifier belongs to the noun, and dropping it after a numeral is a grammar error.
Vietnamese has no neutral you: the kinship terms (anh, chị, em, ông, bà, cô, chú) mark relative age and status for both speaker and listener, and the choice is grammar, not politeness. A message that picks the wrong pair, or mixes them, is wrong in a way the reader feels immediately.
The checker flags a mixed register as style rather than as an error, so the decision stays yours. If a whole text needs to move from one register to the other, the tone changer rewrites it in one pass.
Students in Vietnam and Vietnamese students abroad, where tone marks and the hỏi/ngã rule are marked.
Companies writing to Vietnamese customers, where the wrong kinship term lands harder than a typo.
The diaspora who speak Vietnamese and type it without the marks.
Yes. Check Vietnamese without an account, within the per-check and daily word allowances shown beside the editor. Signing in raises them, and Pro removes the guest limits and the ads. The pricing page lists what each plan includes.
The checker targets the standard written language, which is the same across the country; the northern, central and southern accents lead to different spelling errors (the northern merger of tr/ch and s/x, the southern merger of the hỏi and ngã tones), and the checker knows all of them. Vietnamese is preselected on this page; change the language menu above the editor if the text is a different variant.
Yes, and in Vietnamese the two overlap. The errors met most are tone marks dropped or placed on the wrong vowel of a diphthong (hoà against hòa, both accepted with different conventions; but hóa against hoá is a placement question the checker resolves consistently), the hỏi/ngã confusion in the south, tr/ch, s/x and d/gi/r in the north, and i against y at the end of a syllable (lí/lý). Each of these is underlined where it happens, labelled spelling or grammar, with the standard form and the rule beside it.
Not unless you ask it to. A check corrects what is wrong and leaves your sentences as you wrote them; every change is a separate flag you accept or ignore. The Improve and Rewrite passes, which do change wording, are separate buttons, and the paraphraser is a separate tool.
Yes. Paste the text or drop in a .docx, .pdf or .txt file; the document is checked paragraph by paragraph and the corrected version can be copied or exported. Long documents are checked within the per-check allowance and continue as you scroll.
That is where the reason attached to each flag earns its keep. Vietnamese has no gender, no case, no plural marking on the noun and no agreement. A learner sees which rule was broken, not just the corrected word, and can accept the fix or read why it was raised before deciding.
Translate the corrected Vietnamese, change its tone, or shorten it. One plan covers every tool.
Each page opens the checker with that language already selected and explains what it looks for in it. The picker above the editor covers more than seventy languages in all.
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