透かし追加
各ページに斜めの文字を入れます。
ここにファイルをドロップ
または
対応形式: PDF
無料 · 登録不要 · ほとんどのツールでファイルは端末から出ません
このツールは完全にブラウザ内で動作します。ファイルがアップロードされることはありません。
使い方
1
アップロード
2
設定
3
ダウンロード
よくある質問
Is 透かし追加 free?
Yes. 透かし追加 is completely free with no sign-up, no watermark and no daily limit. There is no paid tier — every tool on iAdorePDF is free to use as often as you like.
Is 透かし追加 safe and private?
Yes. 透かし追加 runs entirely inside your browser, so your file is never uploaded to any server. Nothing leaves your device, which makes it safe for confidential documents.
Do I need to install any software?
No. 透かし追加 works in any modern browser — Chrome, Safari, Firefox or Edge. There is nothing to download and no account to create.
Does 透かし追加 work on a phone?
Yes. 透かし追加 is built mobile-first and works on iPhone and Android exactly as it does on a computer, straight from the browser.
Can I control how the watermark looks?
Yes. Set your own text, then adjust size, opacity, rotation and position so the mark is visible without hiding the content underneath. It is applied to every page at once.
How do I use 透かし追加?
Open the page, drop your file into the upload box (or tap Select file), choose your options, then press the start button. Your result downloads straight to your device.
Is there a file size limit?
There is no server limit because the work happens on your own device. The practical ceiling is your device memory; files up to about 100 MB are comfortable on most phones and much larger on a computer.