Free Image Watermark Online - Watermark Generator

Supports text watermark, logo watermark, batch processing, anti-theft watermark, protect your image copyright

Click or Drag to Upload Images

Supports JPG, PNG, WebP, GIF, BMP formats, max 10MB per image, up to 50 images

Support Ctrl+V to paste clipboard images, all operations done locally, privacy protected

Text Watermark Settings

50%
0°

Logo Watermark Settings

Click to Upload Logo Image

Supports PNG transparent background images

100%
80%
0°

Anti-theft Watermark

50px
45°

Export Settings

90%

Why Choose Our Image Watermark Tool?

📷

Multi-format Support

Supports JPG, PNG, WebP, GIF, BMP, preserves alpha channel

✏️

Text Watermark

Custom text, font, color, opacity, supports 9 fixed positions

🖼️

Logo Watermark

Upload PNG transparent logo, supports scaling, rotation, shadow and stroke

🛡️

Anti-theft Watermark

Grid tile, diagonal tile, invisible watermark, multiple watermark overlay

📦

Batch Processing

Supports batch upload of 50 images, uniform or differentiated processing

👁️

Real-time Preview

Real-time preview effect, original/result comparison, watermark template saving

Image Watermark Tutorial, 4 Easy Steps

1

Upload Images

Click or drag to upload single or multiple images, supports Ctrl+V to paste clipboard images

2

Select Watermark Type

Choose text watermark, logo watermark or anti-theft watermark, set style parameters

3

Adjust Layout

Select fixed position or custom position, adjust size and opacity

4

Preview & Export

Real-time preview effect, click to download single or batch package download

Image Watermark Application Scenarios

📱

Social Media Content

Add copyright watermarks to article images for social media platforms

🛒

E-commerce Product Images

Add store logo and brand information to product images

🎨

Design Asset Protection

Add anti-theft watermarks to designer works to prevent unauthorized use

💼

Business Documents

Add company watermarks to document images for contracts and reports

📸

Social Media Sharing

Add personalized watermarks to shared photos on social platforms

📚

Educational Materials

Add school or teacher information watermarks to teaching PPT images

Image Watermark Knowledge Base

What is EXIF Information?

EXIF (Exchangeable Image File Format) is a metadata format for images that contains information about the shooting device, capture time, GPS location, image orientation, and more. Many photos taken with mobile phones contain rotation information, which can cause incorrect display orientation on computers.

Example: Photos taken vertically on a phone may appear horizontal on a computer. This tool automatically detects and corrects this.

What is Alpha Channel?

The alpha channel is the channel in an image that stores transparency information. PNG format supports alpha channel, which enables background transparency effects. When adding watermarks, if the original image has a transparent background, exporting to PNG format preserves the transparency.

Example: Logo images typically use PNG format so they can be placed on any background without a white border.

How to Choose Watermark Intensity?

Watermark intensity depends on opacity and font size. Lower opacity (smaller value) makes the watermark lighter, suitable for situations where it shouldn't affect the main image content; higher opacity makes the watermark more visible with better anti-theft effect. Generally, it's recommended to set opacity between 30%-60%.

Example: Use 30%-40% opacity for daily shared images, and 50%-60% opacity for important copyright images.

Common Image Watermark Errors and Solutions

❌ Uploaded images appear inverted
Cause: Photos taken with mobile phones contain EXIF rotation information that some browsers don't parse correctly
Solution: This tool automatically detects EXIF rotation information and corrects image orientation
❌ Watermark text is partially hidden
Cause: Font size too large or watermark position exceeds canvas boundary
Solution: Reduce font size or adjust watermark position within the canvas
❌ PNG images have white background after export
Cause: Export format was set to JPG, which doesn't support transparent background
Solution: Select PNG format when exporting to preserve the alpha channel
❌ Some images fail during batch processing
Cause: Some file formats are not supported or files are corrupted
Solution: Check file formats and ensure they are JPG, PNG, WebP, GIF, or BMP format

Image Watermark FAQ

Q1: What image formats are supported?
A1: Supports JPG, PNG, WebP, GIF, BMP formats. Export supports JPG, PNG, WebP formats.
Q2: How many images can I upload in batch?
A2: Up to 50 images per batch, max 10MB per image.
Q3: Can I add both text and logo watermarks?
A3: Yes! Select the "Anti-theft Pro" tab and enable the "Multiple Watermark Overlay" feature.
Q4: Will the watermark overwrite the original image?
A4: No! All operations are performed locally in your browser. The original image always remains unchanged, and you can reset at any time.
Q5: Does it support transparent background images?
A5: Yes! Select PNG format when exporting to preserve the original image's transparent background.
Q6: Can I save watermark settings for next use?
A6: Yes! The tool automatically saves your watermark configuration and will auto-load it next time you open the page.
Q7: Will images be uploaded to a server?
A7: No! All processing is done locally in your browser. Images are never uploaded to any server, protecting your privacy and security.
Q8: Does it support adding watermarks to animated GIFs?
A8: Yes! GIF animations will have watermarks added frame by frame, preserving the animation effect.

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