Find and fix the wrong proofing language in Office documents.

Inspect stored proofing languages, review likely mismatches and download a repaired copy. Documents stay in your browser, and the source code is public.

Select document Review mismatches Download repaired copy

Choose a supported document

Local processing · no upload

Choose a file or drop it here Word, PowerPoint, OpenDocument and RTF · 17 supported formats

No file selected.

Processed locally · Nothing uploaded

Try a sample file or inspect your own document above

Supported formats

Word: DOCX, DOCM, DOTX, DOTM

PowerPoint: PPTX, PPTM, POTX, POTM, PPSX, PPSM

OpenDocument: ODT, OTT, ODP, OTP, ODS, OTS

Rich Text: RTF

What does it change?

Only the proofing-language metadata you explicitly repair. Language Doctor does not rewrite your document text. Smart Fix preselects only high-confidence safe suggestions.

Privacy

Document contents, filenames and file bytes stay on your device. There is no upload endpoint, account system or server-side document processing.

Stored proofing languages

These are the proofing-language tags stored in the document for actual text fragments. They are not the detected language of the text.

0 Text fragments

0 Reliable languages

0 Likely mismatches

0 No language

Set all stored language tags to

Stored language	Tag	Text fragments	Change to

Text language audit

Experimental

Review reliable mismatches individually. Short or non-linguistic fragments are left unchanged. Catalan and Valencian require an explicit variant choice.

Text	Stored	Detected	Status	Fix