Check Polish spelling, grammar and punctuation free. Every issue underlined where it happens, with the reason attached.
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Polish grammar checker
Polish grammar checked with the reason attached
Paste Polish and every issue is underlined where it happens, labelled spelling, grammar, punctuation or style, with the reason attached. Polish is written in the Latin alphabet, and seven cases, ż/rz and u/ó, commas before że and który 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.
How to check Polish grammar
Three steps. The third is the one most checkers leave out.
1
Paste or upload the Polish
Type, paste or drop in a document. Polish is already selected as the language on this page. If the text turns out to be something else, the detector says so and you can change it.
2
Read the flags
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.
3
Accept, ignore or read why
Click a flag to see the fix and the rule behind it, then accept it or ignore it. Polish has rules that speech does not reveal, and the reason is there so the same error is not made twice.
What the checker looks at in Polish
The parts of Polish grammar and spelling where a checker has to know the language, not just the words.
AgreementPolish has seven cases and three genders, and adjectives, pronouns and past-tense verbs agree with the noun: dobry student, dobra studentka, dobrzy studenci. The masculine-personal plural (ci panowie byli) against the other plural (te panie były) is the agreement rule even natives check.
VerbsPast-tense verbs agree in gender and number (zrobiłem, zrobiłam, zrobiliśmy, zrobiłyśmy), and aspect pairs (robić/zrobić) decide whether an action is complete. The endings -em, -eś, -śmy can attach to another word in the sentence, which fluent writers do without noticing.
Spelling and diacriticsą, ć, ę, ł, ń, ó, ś, ź and ż are separate letters; dropping the diacritics (writing zle for źle) is a spelling error, and ó against u, rz against ż, ch against h are the sound-alike pairs that decide most Polish spelling tests.
PunctuationA comma is compulsory before że, który, ponieważ, aby and every other subordinate clause, and is not placed before i or oraz in a plain list. Quotation marks open low and close high („tak”). Decimals take a comma.
Capital lettersDays, months, languages and nationality adjectives are lower case (poniedziałek, styczeń, polski) but the nationality noun is capitalised (Polak, Polka). Pan, Pani and the pronouns Ty, Wy are capitalised in letters as a courtesy.
Common mistakes in Polish writing
Five errors Polish readers notice at once, and what the checker does with each.
nie written together or apart
Together with nouns, adjectives and adverbs (nieprawda, niemiły, niedaleko); apart from verbs and participles used as verbs (nie wiem, nie zrobiono).
Missing comma before że and który
Wiem, że przyjdzie; człowiek, który tu mieszka. The comma before a subordinate clause is not optional in Polish.
ó or u, rz or ż
Góra but kura, morze (sea) but może (maybe). The pairs sound identical; the spelling is fixed by etymology and has to be learned or checked.
Masculine-personal plural agreement
Studenci byli, but studentki były; ci ludzie, but te dzieci. The past tense and the demonstrative both change with this one distinction.
The wrong case after a preposition or a negated verb
Nie mam czasu (genitive after a negated verb), not nie mam czas; with numbers five and above the noun goes to the genitive plural (pięć książek).
Formal and informal Polish
Pan and Pani with the third-person verb (czy Pan może?) are the formal you; ty takes the second person. In email to a stranger, a customer or an official, Pan/Pani is expected and the capital letter is a mark of politeness.
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.
Who checks Polish here
1
Students in Poland and Polish speakers abroad who write Polish less than they read it.
2
Companies writing to Polish customers and authorities, where Pan/Pani and the comma before że are read as competence.
3
Learners at B1 and above who want the case explained rather than swapped.
Polish grammar checker FAQs
Is the Polish grammar checker free?
Yes. Check Polish 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.
Which Polish does it check?
Standard written Polish, spelled as the current standard has it. The rz/ż, u/ó, ch/h and the nasal ą/ę pairs, plus nie written together with adjectives and adverbs (niedobry, niedaleko) but separately from verbs (nie wiem), account for most errors in written Polish. Polish is preselected on this page; the language menu above the editor changes it if the text turns out to be something else.
Does it correct Polish spelling as well as grammar?
Yes, and in Polish the two overlap. The rz/ż, u/ó, ch/h and the nasal ą/ę pairs, plus nie written together with adjectives and adverbs (niedobry, niedaleko) but separately from verbs (nie wiem), account for most errors in written Polish. Each of these is underlined where it happens, labelled spelling or grammar, with the standard form and the rule beside it.
Will it rewrite my Polish?
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.
Can I check a whole Polish document?
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.
Is it useful if I am learning Polish?
That is where the reason attached to each flag earns its keep. Polish has seven cases and three genders, and adjectives, pronouns and past-tense verbs agree with the noun: dobry student, dobra studentka, dobrzy studenci. 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.
After the check
Translate the corrected Polish, 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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