PDF署名
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対応形式: PDF
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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。
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よくある質問
Is PDF署名 free?
Yes. PDF署名 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 PDF署名 safe and private?
Yes. PDF署名 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. PDF署名 works in any modern browser — Chrome, Safari, Firefox or Edge. There is nothing to download and no account to create.
Does PDF署名 work on a phone?
Yes. PDF署名 is built mobile-first and works on iPhone and Android exactly as it does on a computer, straight from the browser.
Is an electronic signature made here legally valid?
A drawn signature placed on a PDF is widely accepted for everyday agreements in many countries, but rules differ by jurisdiction and document type. For contracts with strict legal requirements, check what your local law demands.
How do I use PDF署名?
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.