Corrector.app

Corrector.app is a free writing checker for spelling, grammar and punctuation, with wording suggestions and a separate AI-generated-content detector. It is a sensible fit for students and professionals checking ordinary passages without opening an account. The 15,000-character ceiling and privacy limitations make it less suitable for long or confidential documents.

Overview

Corrector.app combines conventional proofreading with suggestions for alternative words that may better match a sentence and its intended message. Support for more than 27 languages gives it broader reach than a single-language checker, while the separate free AI content detector adds a useful screening task for writers and educators. No registration is required for the grammar checker, so a quick check does not require creating or maintaining a profile.

Grammar Buddies LTD operates the service from 23 New Drum Street, London, England, E1 7AY. The company says Google AdSense and Ezoic advertising fund site operations, development, localization, search optimization and technical support. Its privacy policy says it collects usage data and uses cookies and similar tracking technologies, and does not guarantee absolute security for data transmitted or stored electronically. That is a meaningful drawback when the text contains confidential, personal or commercially sensitive material.

Key features

Proofreading and phrasing help

The checker identifies spelling, grammar and punctuation errors and proposes corrections. Alternative-word suggestions can improve diction after the mechanical errors are fixed, making the service more useful for revision than a spelling-only tool. Results are constrained by the displayed 15,000-character input limit; longer essays, reports or manuscripts must be divided into multiple checks.

Language coverage and AI detection

The maker says more than 27 languages are supported, which suits multilingual students and professionals who work across languages. A free AI content detector is offered alongside the checker, so users can screen text for signs of AI generation without paying for a separate service. The checker itself does not require an account.

Browser access and support

Chrome, Firefox and Edge extensions are linked from the download page. iOS and Android apps are also linked, and the checker can be used in a mobile browser. The download page does not identify other product integrations. Support contacts include general and developer email addresses, with a stated response time of within 24 hours.

Pricing

Plan	Price	What you get
Free	free	Free grammar and spelling checks, no account registration, and a displayed 15,000-character input limit

There is no paid tier or free trial. The free plan is therefore the only choice, and its lack of registration is convenient for occasional checks. Users who need larger single submissions, stronger confidentiality assurances or paid workflow controls will need a different service.

Platforms

Corrector.app is offered on the web, Android and iOS, with browser extensions for Chrome, Firefox and Edge. Although mobile apps are linked, the checker also works through a mobile browser. No desktop-native application or additional integration is identified.

Who it's for

Students and professionals are the stated audience, particularly those who want quick multilingual proofreading, wording alternatives and occasional AI-text screening at no cost. It works best for short or segmented passages and users comfortable with an advertising-funded service. It is a poor match for lengthy drafts that should be processed in one piece or for sensitive writing where the privacy policy's security caveat is unacceptable.

Pros and cons

• Pros: spelling, grammar and punctuation checks are combined with alternative-word suggestions, so revision goes beyond error removal.
• Pros: support for more than 27 languages broadens its usefulness for multilingual work.
• Pros: the checker requires no account, and browser extensions plus mobile apps cover common access points.
• Pros: a free AI content detector adds a second practical use.
• Cons: the 15,000-character limit forces users to split longer documents.
• Cons: usage tracking, cookies and the absence of an absolute security guarantee argue against submitting confidential text.
• Cons: advertising supports the service, and no other integrations are identified.

Alternatives

For a wider comparison of proofreading tools, see Grammar checkers. If AI-text screening is the priority, browse AI Content Detection Software.

• TrustOriginality.ai is a freemium web, Android, iOS and API option with one free text analysis per month and paid multimodal verification, better suited when verification quotas and API access matter.
• Trinka is a freemium checker spanning web, extensions, Windows, macOS, API and self-hosting, worth considering when broader deployment options are important.
• Ahrefs is a freemium web/API SEO platform, so choose it for site data and audits rather than general proofreading.
• SlopTotal is a free detector with no account, credit card or scan limits, making it preferable when unrestricted AI-text scanning is the main need.
• AI Detect is a free local-use detector with no API key or usage limits.
• GPTZero offers freemium AI detection with a 10,000-word monthly free allowance and browser/API access, useful when a defined monthly quota is acceptable.
• AI or Not combines free AI-text and image checks with API access, fitting users who also need image analysis.
• Hive AI-Generated Content Detection provides developer access to multiple Hive models through credits and pay-as-you-go limits.

Verdict

Choose Corrector.app for free, accountless proofreading of short passages, especially when multilingual checks and wording alternatives are useful. Look elsewhere if you routinely handle long drafts, require stronger privacy assurances or need integrations beyond browser extensions and mobile apps.