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G'MIC is a full-featured open-source framework for digital image processing, distributed under free software licenses. It processes generic image datasets, from 1D signals to 3D+t volumetric sequences, and offers several interfaces: a command-line tool, the G'MIC-Qt plug-in for image editors, a C++ library, an online web service and the ZArt video tool.
YOGA Image Optimizer is a free tool to convert and optimize JPEG, PNG and WebP image files. Users drag and drop images and click Optimize. The project states that optimization can be slow and may require a lot of RAM, especially for JPEGs.
Compress JPEG is an online tool for reducing JPEG file sizes for web, social media and email while maintaining quality. It uses the MozJPEG encoder and accepts up to 20 JPEGs per batch, with an optional quality slider for individual files. The page also provides a guide to JPEG compression, including quality level recommendations and processing steps.
BeeRef is a simple reference image viewer that lets users arrange reference images and view them while creating. Images can be moved, scaled, rotated, cropped and flipped, mass-scaled to the same width, height or size, and mass-arranged vertically or horizontally. Text notes can be added. Images are embedded in the .bee file, a sqlite database.
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Caesium is a free, open source online compression tool for photos and images. It supports JPG, PNG and WebP formats, with batch processing and preview. Files are limited to 10 at a time and 20 MB per file. The tool offers quality settings and optional lossless compression that preserves image quality, with an option to keep metadata.
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G'MIC is a full-featured open-source framework for digital image processing, distributed under free software licenses. It processes generic image datasets, from 1D signals to 3D+t volumetric sequences, and offers several interfaces: a command-line tool, the G'MIC-Qt plug-in for image editors, a C++ library, an online web service and the ZArt video tool.
YOGA Image Optimizer is a free tool to convert and optimize JPEG, PNG and WebP image files. Users drag and drop images and click Optimize. The project states that optimization can be slow and may require a lot of RAM, especially for JPEGs.
Compress JPEG is an online tool for reducing JPEG file sizes for web, social media and email while maintaining quality. It uses the MozJPEG encoder and accepts up to 20 JPEGs per batch, with an optional quality slider for individual files. The page also provides a guide to JPEG compression, including quality level recommendations and processing steps.
BeeRef is a simple reference image viewer that lets users arrange reference images and view them while creating. Images can be moved, scaled, rotated, cropped and flipped, mass-scaled to the same width, height or size, and mass-arranged vertically or horizontally. Text notes can be added. Images are embedded in the .bee file, a sqlite database.
Pro Image Tool is a set of free, client-side web utilities for image resizing, format conversion and PDF management. Files are processed inside the browser using HTML5 Canvas and JavaScript, so they are not uploaded to a server. The site includes AI tools, image resizers, format converters and PDF utilities.
Caesium is a free, open source online compression tool for photos and images. It supports JPG, PNG and WebP formats, with batch processing and preview. Files are limited to 10 at a time and 20 MB per file. The tool offers quality settings and optional lossless compression that preserves image quality, with an option to keep metadata.
