Can someone remove the watermark later?

Technically possible using AI, but combining tile mode and proper opacity makes removal extremely difficult and time-consuming.

What is the best logo format and size?

A transparent PNG is highly recommended. The tool automatically scales it, but starting with a logo around 10-20% of the image width yields the best visual results.

Is there a limit to batch processing?

To ensure browser stability, you can securely process up to 20 images at once. Extra large images (20MB+) may take a few seconds to process locally.

Will the original image quality decrease?

If you select 'Original' format and set quality to 100%, degradation is minimal. Alternatively, exporting to PNG provides lossless output.

Are my images sent to your server?

No. All canvas rendering and watermarking processes are handled locally on your device within your browser. No files are ever uploaded.

💧

image watermark,

Image Watermark Tool

Batch insert text or logo watermarks into images.
Freely customize position, opacity, and angle. Processed entirely in-browser.

✍️

Text & Logo

Add a text or logo watermark

📦

Batch Processing

Watermark multiple images at once

⚙️

Fully Configurable

9-point grid and tile positioning

🔒 Fully browser-based — Images are never sent to a server

🖼️

Drag & Drop Images
Or Click to Select

JPEG, PNG, WebP supported (Max 20 images)

* Secure browser processing

about,

About

A fast, browser-based tool to batch insert text or logo watermarks into your images. You can customize the positioning, opacity, size, and rotation angle with a live preview.

Perfect for protecting photographer portfolios, adding store logos to e-commerce images, or preventing theft of SNS posts.

how to use,

How to Use

STEP 1

Upload Images

Drag & drop or select multiple images at once.

STEP 2

Configure Watermark

Choose text or logo, adjust opacity, position, and rotation via the preview.

STEP 3

Download

Download images individually or bundled in a ZIP file.

glossary,

Glossary

Watermark: A text or logo superimposed over an image to show copyright or origin. Effective for visual theft prevention.
Opacity: A setting controlling the visibility of the watermark from 0 to 100%. Lower values make it more transparent.
Tile Mode: Drawing the watermark repeatedly in a grid pattern. Covers the whole image to highly deter theft.
Copyright: The exclusive legal right of the creator. Usually marked with the © symbol like "© Year Name".
Creative Commons: A licensing framework offering standard permissions for image sharing.
Canvas API: A standard web API used to render and mix graphics directly inside your browser.

faq,

FAQ

Q.Can someone remove the watermark later?: Technically possible using AI, but combining tile mode and proper opacity makes removal extremely difficult and time-consuming.
Q.What is the best logo format and size?: A transparent PNG is highly recommended. The tool automatically scales it, but starting with a logo around 10-20% of the image width yields the best visual results.
Q.Is there a limit to batch processing?: To ensure browser stability, you can securely process up to 20 images at once. Extra large images (20MB+) may take a few seconds to process locally.
Q.Will the original image quality decrease?: If you select 'Original' format and set quality to 100%, degradation is minimal. Alternatively, exporting to PNG provides lossless output.
Q.Are my images sent to your server?: No. All canvas rendering and watermarking processes are handled locally on your device within your browser. No files are ever uploaded.