スタンプ・日付消去

ドキュメントや証明書から、透かしスタンプ、認証日、スキャン時の不要な映り込みをローカルで消去します。

Exam Guidelines Compliance

Clean Scanner Stamps and Dates from Certificates

Scanned marksheets, certificates, and older documents sometimes feature digital watermarks, scanner stamps, or date-stamps that clutter the document page. If a portal requires clean document uploads, these markings can cause submission errors. Our local eraser tool lets you mask unwanted stamps and dates from scanned documents using inpainting technology, ensuring clean documents client-side.

How to Use スタンプ・日付消去

Follow these simple steps to optimize and prepare your files client-side:

Select Scanned Document

Upload the image of the document or certificate you wish to clean.

Brush Over Watermark

Use the brush tool to cover the stamps, dates, or artifacts you want to remove.

Erase and Export

The local inpainting engine will restore the background pixels. Export the cleaned document.

Frequently Asked Questions

Common questions regarding file security, dimensions, and portal regulations:

Is it legal to remove stamps or watermarks?

This tool is intended for personal document cleanup, such as removing scanner artifacts, date markers, or personal scan watermarks before portal submissions. Do not use it to alter official verification stamps.

Does this tool support PDF documents?

This tool processes image formats (JPG, PNG). If your document is a PDF, convert it to an image first, clean the artifacts, and save it back to PDF.

How does the pixel restoration work?

Our browser-based pixel restorer analyzes surrounding document texture to fill in the brushed area, leaving the document looking clean and seamless.

Suggested Next Steps / Related Tools

PDF圧縮

画質を保ったままPDFファイルを指定の容量以下に圧縮します。スキャン文書や証明書の最適化に最適です。

JPGからPDF

JPG、JPEG、PNG画像をPDFに変換します。ページの自動縮小と容量調整が可能です。

PDF結合

複数のPDFファイルや証明書を1つのドキュメントに結合します。ページの並び替えや容量最適化もサポート。