什么是水印平铺添加器？
水印平铺添加器是一款在线图片水印工具，可以在图片上批量添加半透明文字或 Logo 水印，水印以倾斜方式满屏平铺，有效防止图片被盗用或未授权传播。所有处理在浏览器本地完成，图片不会上传服务器。
核心功能：
- 文字水印：输入任意文字（如"仅供内部使用""仅用于办理XX业务"），文字将斜铺满整个图片
- Logo 水印：上传公司 Logo 或印章图片，作为水印平铺到整张图上
- 丰富参数：可调整字号、颜色、透明度、倾斜角度、水平/垂直间距
- 描边增强：可选文字描边，让水印在任何背景色上都清晰可辨
- 一键下载：生成后直接下载带水印的 PNG 图片，保持原图分辨率
典型使用场景：
- 摄影师/画师防盗图：发布样图前添加半透明满屏水印，防止原图被盗用
- 证件复印件保护：在身份证、护照复印件上添加"仅用于XX用途"水印，防止被挪作他用
- 企业文件保护：在合同、方案、设计稿上添加公司 Logo 水印，标记文件归属
- 社交媒体预览图：发预览图时加水印，保护原创作品
技术原理：使用 Canvas API 在原图上方绘制旋转后的水印图层，水印位置通过间距参数控制，确保覆盖整张图片且不重叠过多，最终输出与原图同分辨率的 PNG。
What is the Watermark Tiling Tool?
The Watermark Tiling Tool is an online image watermarking utility that adds semi-transparent text or logo watermarks across your entire image in a diagonal tiled pattern, effectively preventing unauthorized use or distribution. All processing runs locally in your browser — your images never leave your device.
Core features:
- Text Watermark: Enter any text (e.g. "Internal Use Only", "For XX purpose only") and it will tile diagonally across the entire image
- Logo Watermark: Upload a company logo or stamp image to tile across the image
- Rich Parameters: Adjust font size, color, opacity, rotation angle, and horizontal/vertical spacing
- Stroke Outline: Optional text outline for readability on any background color
- One-Click Download: Download the watermarked PNG at the original image resolution
Common use cases:
- Photographer/Artist Protection: Add semi-transparent tiled watermarks to previews before publishing, preventing theft of original work
- ID Document Protection: Add "For XX purpose only" watermarks to copies of ID cards or passports to prevent misuse
- Corporate Document Marking: Add company logo watermarks to contracts, proposals, and design drafts to indicate ownership
- Social Media Previews: Watermark preview images to protect original creations
Technical approach: Uses the Canvas API to draw a rotated watermark layer on top of the original image. Watermark positions are controlled by spacing parameters to ensure full coverage without excessive overlap. Output is a PNG at the original resolution.