Add Watermark to Image Online
Add custom text or image logos to your photos online for free. Adjust fonts, outlines, shadow backdrops, composite blend modes, and apply repeating tiling grids. 100% client-side batch processing with absolute privacy.
Drag & drop images here
or browse files
What is the Watermark Image?
Overview and core technical concepts
The Watermark Image is a professional, client-side utility designed to streamline watermark image tasks with instant processing, privacy guarantees, and customizable options.
Why Use the Watermark Image?
Key advantages, developer speedups, and security benefits
Speed & Reliability
Execute calculations and transformations instantly in your local browser memory.
Enterprise Data Privacy
Your data stays on your local device, meeting strict data compliance requirements.
When to Consider Alternatives?
Anti-patterns, limitations, and when to choose an alternative approach
This tool is optimized for modern web browsers supporting Web Cryptography & WebAssembly standards.
Watermark Image Example
Sample inputs, expected outputs, and code patterns
Sample Usage Output
Generated result using Watermark Image parameters.Common Watermark Image Mistakes
Frequent errors, security risks, and how to fix them
Frequently Asked Questions
No. Our Add Watermark to Image tool operates 100% client-side inside your browser sandbox. We use HTML5 Canvas, OffscreenCanvas, and Web Workers to process your images locally. Your files are never uploaded or transmitted to our servers, assuring total privacy and security.
Yes. You can customize either a text watermark (with custom fonts, colors, borders, shadows, backgrounds, padding, and corner radius) or upload a logo file (PNG, WebP, SVG) as an image watermark, adjusting layout transforms like rotation, scaling, flips, and composite blending modes.
Yes. You can upload multiple files at once. The tool applies the same watermark placement, sizing, and styling rules to every image in the batch using Web Workers in the background, keeping the browser UI fully responsive. You can download the completed files individually or as a single ZIP package.
Yes. By toggling the 'Tiled Watermark' setting, you can repeat your text or image watermark in a repeating grid pattern across the entire canvas. You can customize grid rotation, opacity, and horizontal/vertical spacing values.
We support JPG, JPEG, PNG, WEBP, AVIF, BMP, GIF (first frame), and SVG (auto-rasterized) as input images. You can save your watermarked images as PNG, JPEG, or WebP.
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