Local AI Grammar Checker

Q: Is my writing uploaded?

No. Proofreading runs with the shared local model in your browser, saved text stays in local storage, and content is excluded from analytics.

Q: What does grammar-only mode change?

It is instructed to make only necessary grammar, spelling, and punctuation corrections while preserving wording and meaning wherever possible.

Q: Does academic mode verify citations?

No. It may improve surface academic style, but it cannot verify sources, evidence, attribution, or field-specific correctness.

Q: Does refreshing download the model again?

Normally no. Verified weights are cached by immutable version and reused after refresh; the runtime instance is rebuilt from the cached model.

Proofread pasted text, TXT, or Markdown locally for grammar, spelling, punctuation, and optional style improvements. Compare the original and corrected text and review only change excerpts that exist in the source.

Saved sessions

155 / 1000000

Grammar, spelling & punctuation only

155 characters

1 source segments

Grammar-only mode makes necessary spelling, punctuation, and grammar changes. Other modes may improve style but must preserve facts, names, numbers, commitments, citations, and meaning.

Local AI runtime

Checking this device

BackendWASM

Device profile—

Adaptive limits—

Writing model

Qwen 0.5B · standard

Transcription model

Whisper Tiny · fast

Files, prompts, and results stay in this browser. Browser storage can still be cleared by you, private mode, or browser cleanup.

Private local proofreading

Source text, prompts, corrections, change explanations, sessions, and exports stay in your browser. The content is not uploaded or included in analytics.

Current limitations

Local models can miss errors or over-correct deliberate style; compare every revision with the complete original.
Academic and business modes improve surface style but do not verify facts, citations, terminology, or compliance.
Long text is proofread in bounded segments, so document-wide consistency may still require manual review.
Verified model weights normally remain cached across refreshes, but clearing site data, private browsing, or browser eviction can require another download.

How the local grammar checker works

Paste or import text

The source is saved locally and long text is divided at stable boundaries for the current device.

Apply a proofreading contract

The global local model corrects bounded segments while preserving facts and returning structured change explanations.

Compare and export

Only changes linked to actual source excerpts appear in the table; review the complete correction before copying or exporting.

Local grammar checker FAQ

Is my writing uploaded?

What does grammar-only mode change?

Does academic mode verify citations?

Does refreshing download the model again?

Rewrite text and change tone Generate a structured report

How the local grammar checker works

Paste or import text

The source is saved locally and long text is divided at stable boundaries for the current device.

Apply a proofreading contract

The global local model corrects bounded segments while preserving facts and returning structured change explanations.

Compare and export

Only changes linked to actual source excerpts appear in the table; review the complete correction before copying or exporting.

How the local grammar checker works

Paste or import text

Apply a proofreading contract

Compare and export

Local grammar checker FAQ

Related writing tools

How the local grammar checker works

Paste or import text

Apply a proofreading contract

Compare and export

Local grammar checker FAQ

Related writing tools