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image-watermarker

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画像を選択またはドラッグ＆ドロップ

PNG, JPG, SVG up to 10MB

画像をアップロードして開始

処理されたファイルの詳細はここに表示されます。

Free Online Image Watermarker: Protect Photos with Text & Logo Watermarks

Protect your creative work, commercial graphics, and digital photography from unauthorized copying with the free Image Watermarker on ImageProBox. Easily add custom text watermarks, copyright notices, or high-resolution PNG logos directly onto your images inside your web browser.

Our client-side watermarking tool offers complete control over font styling, text color, opacity levels, rotation angles, and placement coordinates (including full grid tiling). Enjoy 100% private processing where your source files never leave your device.

主なメリット

  • Custom Text & Logo Support: Overlay crisp text copyright notices or upload transparent PNG logos and watermarks.
  • Flexible Positioning & Tile Grid: Place watermarks in any corner, center, or repeat across a full tiled grid overlay.
  • Opacity & Rotation Precision: Fine-tune transparency, font size, and rotation angles with live real-time canvas preview.
  • 100% In-Browser Privacy: All rendering happens in client-side RAM—no server uploads, no data storage.
  • Universal Format Support: Seamlessly watermark JPG, PNG, WebP, and SVG images for online distribution.

使い方

  1. Upload Main Image: Drag and drop your photo or graphic into the Watermarker workspace.
  2. Choose Watermark Mode: Select 'Text' to type a copyright string or 'Logo' to upload your PNG mark.
  3. Customize Placement & Style: Adjust font size, text color, opacity slider, rotation angle, and position grid.
  4. Apply & Download: Click 'Apply Watermark' to render the canvas and save your protected image instantly.

よくある質問

Is my original image overwritten or modified on a server?

No. The watermarked image is rendered locally in your browser memory. Your original file remains untouched on your device.

Can I create a repeated pattern watermark across the entire image?

Yes! Select the 'Tile Grid' position option to automatically repeat your text or logo watermark across the entire image canvas.

エキスパートのヒント：サイトの速度を向上させましょう！🚀: 画像の最適化は始まりにすぎません。最速の読み込み時間のために、高性能なクラウドホスティングをお勧めします。

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