1Checker

1Checker is a free AI grammar and spelling checker with Chinese-English support, offering proofreading and writing enhancement in the browser.

Overview

1Checker provides grammar, spelling and style checking aimed heavily at Chinese users writing English. It detects common interlanguage errors such as article misuse, tense inconsistency and awkward collocations, and offers one-click corrections with explanations. The tool also scores text for readability and provides vocabulary enrichment suggestions. Available on web, desktop and Word plugins, it is one of the longest-running free proofreading tools for the Chinese market.

How It Works

Paste your English text into the web editor or write directly in the Word plugin and run the check. Review the flagged issues with their explanations, apply one-click corrections and note recurring mistakes to improve over time.

Key Features

• Grammar and spelling checking tuned for Chinese-English writers
• One-click corrections with grammar explanations
• Readability scoring and text quality analysis
• Vocabulary enrichment and collocation suggestions
• Web, desktop and Microsoft Word plugin availability
• Free core proofreading with no subscription required

Pricing

1Checker is freemium: core proofreading is free, with premium plans unlocking longer documents, advanced style suggestions and ad-free use.

Who Is It For

Chinese students, English learners and office users who need free English grammar checking and writing improvement tools.

Common Use Cases

• Checking English essays and homework
• Proofreading work emails before sending
• Learning from grammar explanations

FAQ

Is 1Checker free to use?

Yes. 1Checker’s core grammar and spelling checking is free; longer documents and advanced polishing are included in membership plans.

Does 1Checker offer an API?

1Checker is delivered via web, desktop and Word plugin experiences and does not publish a general API.

How does 1Checker compare to alternatives?

Compared with Grammarly, 1Checker is free and specifically tuned for Chinese-English interlanguage errors, which makes it a practical entry tool for English learners.

What should I know before adopting 1Checker?

1Checker covers everyday proofreading well but lacks the polished rewriting of paid tools. It is best for learners and casual use where free access matters more than advanced style guidance.

How accurate is 1Checker’s checking?

It reliably catches common grammar and spelling errors, especially typical Chinese-English interlanguage problems like article misuse and tense inconsistency. Feedback on complex syntax and academic phrasing is shallower than paid tools, so combine its one-click corrections with human review for important documents like journal submissions.

Can I use it inside Word?

Yes. 1Checker offers a Microsoft Word plugin for in-document checking and one-click fixes, avoiding copy-paste between windows.