Pixillion
Convert JPG, HEIC, WEBP, PNG, JPEG, PDF, CR2, DNG, and other image formats. Convert images to JPEG, GIF, PNG, PDF, BMP, TIFF, and more. Rotate, resize and compress digital photos. Easily add captions or watermarks to your images. Convert images in a couple of clicks. Update metadata of image files. Crop multiple photos at once to a predefined aspect ratio or custom size. Free version available for non-commercial use. The easy one-click process makes Pixillion perfect for converting your image files and digital photos for posting on the web, emailing to friends, or displaying on your mobile phone. Convert or compress thousands of photos at a time with batch conversion. Preserve vector graphics when converting between vector formats. Resize images, add text captions and watermarks and even convert images from the right-click menu. Preview images before conversion, as well as image file format, compression settings, and dimensions for image resizing.
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4K Image Compressor
4K Image Compressor is a free cross-platform app that lets you optimize PNG, JPEG, HEIC, and WEBP images quickly and without quality loss.
With 4K Image Compressor, you can:
Reduce the size of an image by a desired number of percent or to a particular size in megabytes, kilobytes, or even bytes
PNG, JPEG, HEIC, and WEBP are supported for optimization and conversion, and more are coming soon
Batch compression is available to save your time
You can upload images in lossless and lossy formats.
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Imagify
Imagify is a powerful and easy-to-use WordPress plugin designed to optimize images and speed up your website. It automatically compresses, resizes, and converts images to modern formats like WebP and Avif with just one click. Created by the team behind WP Rocket, Imagify guarantees improved website loading times without sacrificing image quality. It enhances key performance metrics such as Google PageSpeed scores and Core Web Vitals. Imagify is ideal for users who want a quick and efficient way to compress large image files in bulk without any technical knowledge. Overall, it helps businesses improve SEO, user experience, and conversions by making images lighter and faster to load.
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ConvertYard
ConvertYard is a browser-based file conversion platform powered by WebAssembly. All processing happens on your device — files never leave your browser.
Image tools: Convert HEIC, JPG, PNG, WebP, and AVIF formats. Compress, resize, and remove backgrounds in bulk.
PDF tools: Merge PDFs, compress file size, extract pages, delete pages, crop, add page numbers, and export pages as images.
Video & audio: Convert between formats and extract audio tracks.
Developer utilities: Format JSON, encode/decode Base64, convert JSON to CSV.
AI tools: Auto-generate alt text for images to improve accessibility.
All tools support batch processing of up to 1,000 files per run. Results are packaged into a single ZIP download. No account required, no watermarks, no file size paywalls. Works offline after the initial page load via WebAssembly caching. Clean interface with no ads inside the conversion workflow.
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