Free Image Watermarking Tool — No Limits, No Upload
Protect your photography with professional text or logo watermarks — batch process entire galleries in seconds. imgavio processes everything locally in your browser using WebAssembly technology — your images never leave your device at any point. This gives you the privacy of desktop software with the convenience of an online tool.
How to Use the imgavio Image Watermarking Tool
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Upload your images
Click the upload area or drag and drop your files. Supports JPG → PNG → WebP. You can select multiple files for batch processing.
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Adjust settings (optional)
Use the quality slider and other controls to customize the output to your needs. The defaults are optimized for most use cases.
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Download your results
Click download next to each file, or use "Download All" for batch downloads. Results are instant — no server round-trip required.
Frequently Asked Questions
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Can I add a logo or image as a watermark?Yes. Upload your logo (PNG with transparency works best) as the watermark image, then position and scale it on your photos.
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How do I control watermark transparency?The opacity slider controls how visible the watermark is, from fully transparent (0%) to fully opaque (100%). A common choice is 30-50% for visible but unobtrusive watermarks.
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Can I watermark multiple images at once?Yes. Upload multiple images, set your watermark parameters once, and apply to all images simultaneously.
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What fonts are available for text watermarks?imgavio includes a selection of web-safe fonts and modern display fonts. You can also control text size, color, bold, italic, and letter spacing.
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Can I tile the watermark across the entire image?Yes. The tile mode repeats the watermark in a diagonal pattern across the entire image — ideal for maximum protection.
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Does it support transparent PNG watermarks?Yes. PNG logos with transparency work perfectly as watermarks.
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Will the watermark be included if I then compress the image?Yes. Watermarks are embedded in the image pixels before download. Any subsequent processing will include the watermark.