Media
Image Bit Depth to PNG Converter
Convert images to exact monochrome, indexed, grayscale, RGB, or RGBA PNG bit depths with verified output.
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-to-bit-depth-png' \
-H 'Content-Type: application/json' \
-d '{"filename":"imageFile.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-to-bit-depth-png' \
-F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
-F 'outputMode=indexed-4' \
-F 'dithering=floyd-steinberg' \
-F 'threshold=50' \
-F 'backgroundColor=#ffffff' \
-F 'preserveMetadata=false'