🖼 Image Compressor — Reduce Image File Size
Compress JPG, PNG, and WebP images with full control over quality, dimensions, and output format. Batch process multiple images and download as ZIP — all in your browser.
How to Compress Images Online
Upload one or more images using the drop zone above. You can drag and drop JPG, PNG, and WebP files directly from your computer, or click to select them. Adjust the quality slider to control the compression level — lower values produce smaller files but reduce image quality. Set maximum width and height to resize images during compression, or leave them at 0 to keep original dimensions.
Choose your desired output format from the dropdown. JPEG is best for photos, PNG for graphics with text or transparency, and WebP for modern web optimization. Click "Compress All" to process all images. Once compression is complete, you can download individual images or use "Download All as ZIP" to get a single archive.
Quality Settings Explained
The quality slider ranges from 10% to 100%. For JPEG and WebP formats, lower quality values apply more aggressive compression, resulting in smaller files but potential visual artifacts. A quality setting of 70-80% typically offers an excellent balance between file size and visual quality for web use. PNG compression is lossless, so the quality slider has a minimal effect — PNG files are compressed as much as possible regardless of the quality setting.
Resizing During Compression
Setting a maximum width and height allows you to downscale large images before compression. This is extremely effective for reducing file size because fewer pixels means less data to encode. The tool maintains the original aspect ratio automatically. For example, setting max width to 1920 pixels will shrink a 4000px-wide photo to 1920px wide, with height scaled proportionally.
JPEG vs PNG vs WebP — Compression Comparison
JPEG Compression
Pros: Universal browser support, excellent compression for photographs, adjustable quality, small file sizes at medium quality. Most widely supported image format on the web.
Cons: Lossy compression introduces artifacts at low quality, no transparency support, no animation support, generational quality loss on re-saving.
PNG Compression
Pros: Lossless compression preserves every detail, supports full alpha transparency, no artifacts regardless of re-saving, ideal for screenshots and graphics with text.
Cons: Larger file sizes than JPEG for photographs, no animation support, older browser issues with large PNGs, no native EXIF support.
WebP Compression
Pros: 25-35% smaller than JPEG at same quality, supports both lossy and lossless compression, full alpha transparency, animation support, modern web standard.
Cons: Not supported in older browsers (pre-2020), slightly slower encoding, limited support in some editing software, larger than AVIF in some comparisons.
Image Compression Best Practices
For web images, always resize to the display dimensions before uploading — serving a 4000px image in a 300px thumbnail wastes bandwidth. Use JPEG for photographic content with quality 70-85%, and PNG for screenshots, logos, and graphics needing transparency. Consider WebP for modern websites as it offers superior compression. Always preview compressed images at full size to verify quality is acceptable before publishing. Batch compression with ZIP download is ideal for preparing multiple images for a website gallery or email attachment.