Corrector App

Corrector App

Corrector App is a free online grammar, spelling and punctuation checker that works in English, Tagalog and more than 25 other languages, with no account or download required.

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ai-grammar-checkerai-proofreadingai-spell-checkai-writing
Last Updated Nov 10, 2026
Corrector App screenshot

About

Corrector App is a free web-based writing tool that checks text for grammatical, spelling and punctuation mistakes. It addresses a common problem for writers: producing polished articles, emails, essays and other documents without errors that undermine credibility, particularly when writing in a language that is not one's first.

Users paste text of up to 15,000 characters into the online editor, select a language or regional variant, and the tool highlights errors along with suggested fixes. Clicking a suggestion applies the correction, and the tool also explains each mistake so writers can learn from it. The service is operated by a small team led by CEO Carla Falzoni, is built on LanguageTool technology, and is available in English, Tagalog and more than 25 other languages.

Key Features

Grammar checking: Detects grammatical issues such as incorrect verbs, prepositions and adverbs, and suggests sentence restructuring so text reads correctly.
Spelling correction: Identifies misspelled words and offers a list of alternatives, letting the writer pick the right term for the context.
Punctuation review: Flags punctuation problems so sentences are formatted properly.
Word suggestions: Provides alternative word choices that improve how a sentence flows.
Explanations of mistakes: Each correction comes with an explanation of the underlying error, which helps writers improve rather than just accept changes blindly.
Multilingual support: Works in English (with US, UK, Australian, Canadian, South African and New Zealand variants), Tagalog, Spanish, French, German, Italian, Portuguese, Russian, Chinese, Japanese, Arabic and many other languages.
No account or download needed: Runs entirely in the browser, so users can check text without installing software.

Pricing & Fees

  • Pricing: The grammar checker is presented as free on the official site; no paid plans are described on the pages reviewed.
  • Character limit: Each check accepts up to 15,000 characters of text.
  • Accessibility: Available online in more than 150 countries, with mobile-friendly use on iPhone and Android browsers.
  • Technology credit: The site acknowledges that its checking engine is powered by LanguageTool.

Who It's For

Corrector App suits students and academics proofreading essays, non-native English speakers who want a second check on their writing, and professionals preparing emails, letters or reports. It is also a practical choice for Tagalog writers, since dedicated Tagalog grammar checking is uncommon, and for anyone working across the many supported languages. Bloggers and content creators can use it as a final review step before publishing articles or social media posts.

FAQ

What is Corrector App?Corrector App is a free online grammar, spelling and punctuation checker that works in English, Tagalog and more than 25 other languages without requiring an account or download.

Is Corrector App free to use?Yes, the tool is offered free of charge on its official site, with no registration required; the pages reviewed do not list any paid plans.

Which platforms does Corrector App work on?It runs in a web browser on desktop as well as on iPhone and Android devices, with no installation needed.

How much text can Corrector App check at once?Each check handles up to 15,000 characters, so longer documents need to be split into sections.

What technology powers Corrector App?The site credits LanguageTool as the underlying engine for its grammar and spell checking.