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Reduce image file size without losing quality. Free, private, runs in your browser.
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Image compression reduces the file size of a photo or graphic while preserving as much visual quality as possible. There are two types: lossless compression (no quality loss, smaller savings) and lossy compression (slight quality reduction, much larger savings). Convertful uses smart lossy compression that targets redundant data humans can't easily perceive, achieving 60–80% file size reduction with minimal visible difference.
Smaller images load faster on websites, improving user experience and SEO rankings. They also consume less bandwidth, which matters for mobile users on limited data plans. Email services often have attachment size limits — compressed images are easier to send. For photographers and designers, compressed images are also easier to store and back up without eating through disk space.
Convertful's image compressor runs entirely in your browser. For JPG files, it re-encodes the image at your chosen quality level using the browser's native Canvas API. For PNG files, it applies optimized deflate compression. For WebP, it leverages the format's built-in lossy/lossless modes. You can adjust the quality slider to find the perfect balance between file size and visual fidelity.
Completely. Your images never leave your device. All compression happens locally in your browser using JavaScript and Canvas APIs. No upload, no server processing, no data collection. Close the tab and everything is gone.
Typically 60-80% file size reduction with minimal visible quality loss, depending on the image content and compression settings.
Our smart compression algorithm prioritizes visual quality. You can adjust the quality slider to find the perfect balance between file size and quality.
JPG, PNG, and WebP images. The output format matches the input format.