Image Watermark
Add text, logo, or tiled watermarks to your images — free, instant, browser-based
Watermark Settings
Watermark Type
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Free Online Image Watermark Tool — Add Text, Logo & Tiled Watermarks to Photos
A watermark is a visible overlay added to an image to identify who created it or owns it. Photographers use watermarks to stop others from using their photos without permission. Businesses use them to brand images before sharing on social media. Designers add "DRAFT" or "CONFIDENTIAL" text watermarks to documents before client review. The OmniWebKit Image Watermark tool lets you do all of this directly in your browser — no account required, no file upload to a server, completely free.
Upload any image, choose your watermark type (text, logo, or tiled pattern), customise every setting — font size, opacity, position, rotation, colour — and download the watermarked image as a PNG file in seconds. All processing runs client-side using the HTML5 Canvas API. Your original images remain private.
Three watermark modes cover every use case: a single text label at any of nine positions for simple branding, a logo overlay for professional watermarks with your own image/icon, and a tiled repeating pattern for maximum copyright protection. Each mode has full controls for opacity, rotation, and positioning.
Three Watermark Types — What Each One Does
🔤Text Watermark — Simple Branding+
A text watermark places a single line of custom text on your image at a position of your choice. You set the text (your name, website URL, copyright notice, or any label), the font size, the text colour, the background fill colour, the opacity, and the rotation angle. Position it in any of nine spots: all four corners, all four edge centres, or the middle of the image. Text watermarks are the most common type. They are quick to apply, easy to read, and effective for everyday content protection.
✓ Best for: Photographers branding portfolio images, social media posts, website images, content creators adding their handle
🏷️Logo Watermark — Professional Branding+
A logo watermark uses your own image file — typically a logo, icon, signature, or brand mark — as the watermark overlay. Upload your logo (PNG with transparency works best so the background is invisible), set the size as a percentage of the original image width, control the opacity, set a rotation if needed, and position it on the image. Logo watermarks look more professional than text because they use your actual brand identity rather than plain text. They are commonly used by commercial photographers, marketing agencies, and businesses.
✓ Best for: Commercial photography, brand asset protection, product photos, professional portfolios, agency watermarks
🔲Tiled Pattern Watermark — Maximum Protection+
A tiled watermark repeats your text in a diagonal grid pattern across the entire image. This is the most effective type for copyright protection because it is much harder to crop or remove than a corner watermark — every part of the image has the watermark visible. The tiled pattern is used with a low opacity (typically 5–15%) so it doesn't obscure the image content but is clearly visible. The rotation, spacing, font size, and opacity are all adjustable. Common applications include "CONFIDENTIAL" notices on documents, "SAMPLE" watermarks on product previews, and full-coverage copyright protection on photography.
✓ Best for: Document watermarking, sample previews sent to clients, legal document protection, stock photo watermarking
Watermark Settings Explained
Opacity
Controls how transparent the watermark is. 100% is fully opaque (solid, not see-through). 10–20% is very subtle — the watermark is visible but does not strongly interfere with the image. Most photographers use 50–80% for visible-but-not-distracting text watermarks.
Position
Nine positions are available: all four corners, all four edge centres, and the exact centre of the image. Bottom-right is the most common position for copyright watermarks. Centre is often used for sample/draft watermarks.
Rotation
Rotates the watermark text or logo by the specified angle (−90° to +90°). A slight diagonal (10–20°) makes watermarks harder to crop out. The tiled mode uses rotation to create the diagonal repeating pattern.
Font Size
Controls the size of text in pixels. Larger text is more visible and harder to remove. Smaller text is more subtle. For a 3000px wide photo, a font size of 60–80px is typically visible without being distracting.
Logo Size
For logo watermarks, the size is expressed as a percentage of the original image width. 20% means the logo will be 20% as wide as the image. Adjust based on the complexity of your logo — simple icons work at smaller sizes, detailed logos may need 25–35%.
Tile Spacing
For tiled watermarks, spacing controls the distance between each repetition of the text. Smaller spacing = more instances of the watermark = denser coverage. Larger spacing = fewer, more spread out. 150–250px works well for most images.