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This tool uses your browser's native canvas API to process images locally. When you resize an image, it's redrawn at the new dimensions using bicubic interpolation (browser default), which maintains visual quality during downscaling. The original image never leaves your computer—all processing happens in-memory. If you need to reduce file size without changing dimensions, try our dedicated image compression tool for more aggressive size optimization.
Your images are processed 100% in your browser. No files are uploaded to any server. This ensures complete privacy for sensitive or personal images. The tool works offline once loaded and doesn't use any tracking or analytics for image processing.
Supported formats: JPEG, PNG, WebP. When converting formats, note that JPEG uses lossy compression (adjustable quality), PNG preserves transparency and uses lossless compression, while WebP offers modern compression with both lossy and lossless options. For format-specific adjustments, you might want to use our image converter tool which specializes in format transitions.
Image compression involves a balance between file size and visual quality. Higher JPEG quality values (85-100) preserve detail but create larger files. Lower values (60-75) reduce file size significantly with minimal quality loss for web use. PNG is ideal for graphics with transparency but may produce larger files for photographs. If you're working with images that have solid backgrounds, you might want to check out the background remover for cleaner compositions.
When reducing dimensions (downscaling), quality is generally well-preserved. When enlarging images, some softness may occur as the tool interpolates new pixels. For best results, start with the highest resolution source image available. If you notice blurriness, try our image sharpener afterward to enhance clarity.
Resizing changes the pixel dimensions of an image. Compression reduces file size by applying algorithms (like JPEG compression) that may slightly reduce quality. This tool can do both simultaneously. For advanced compression, see our specialized compressor.
WebP is a modern format developed by Google that typically produces files 25-35% smaller than JPEG at equivalent quality. It's supported by all modern browsers and offers both lossy and lossless compression options. Our conversion tool makes switching to WebP effortless.
Most metadata (EXIF, camera settings, location data) is stripped during processing for privacy and file size reduction. If you need to preserve metadata, consider specialized tools designed for that purpose. You can also use our metadata viewer to check what information remains.
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