Design
Image Watermark Opacity
Add watermarks with custom opacity to images, supporting both text and image watermarks with advanced opacity controls
file· File resultOpen tool
Quick start
Call this tool from your code in three languages.
cURL
# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/image-watermark-opacity' \
-H 'Content-Type: application/json' \
-d '{"filename":"imageFile.ext","contentType":"application/octet-stream","size":12345}'
curl -X POST 'https://api.elysiatools.com/api/upload/presign/image-watermark-opacity' \
-H 'Content-Type: application/json' \
-d '{"filename":"watermarkImageFile.ext","contentType":"application/octet-stream","size":12345}'
# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
--data-binary @/path/to/file.ext
# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/en/api/tools/image-watermark-opacity' \
-F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
-F 'watermarkType=text' \
-F 'watermarkText=© Watermark' \
-F 'watermarkImageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
-F 'position=bottom-right' \
-F 'opacity=0.7' \
-F 'textOpacity=0' \
-F 'backgroundOpacity=0' \
-F 'fontSize=40' \
-F 'fontColor=#ffffff' \
-F 'backgroundColor=#000000' \
-F 'rotation=0' \
-F 'scale=0.2' \
-F 'margin=20' \
-F 'blendMode=over' \
-F 'textStyle=normal' \
-F 'fontWeight=bold' \
-F 'textAlign=left' \
-F 'shadowEnabled=false' \
-F 'shadowOpacity=0.5' \
-F 'shadowBlur=3' \
-F 'shadowOffsetX=2' \
-F 'shadowOffsetY=2' \
-F 'gradientEnabled=false' \
-F 'gradientStartColor=#ffffff' \
-F 'gradientEndColor=#cccccc' \
-F 'gradientDirection=horizontal'