Image Compressor
Compress and resize JPG, PNG or WebP images right in your browser, then download. Nothing uploaded.
Image Compressor - Reduce File Size Without Quality Loss
Shrink your image files by adjusting quality, resizing dimensions, or converting to more efficient formats like WebP. This browser-based compressor processes images entirely on your device - nothing is uploaded, making it fast, private, and perfect for sensitive photos or proprietary graphics.
How Image Compression Works
Image compression reduces file size by either removing visual data that humans barely notice (lossy compression) or encoding the data more efficiently (lossless compression). This tool gives you control over the quality slider - higher quality means larger files with more detail, while lower quality produces smaller files with some visible degradation at close inspection.
You can also resize dimensions to reduce file size dramatically. A 4000 by 3000 pixel photo resized to 1200 by 900 pixels retains excellent quality for web display while dropping to roughly one-tenth of the original file size. Combining quality adjustment with resizing gives you maximum control over the size-quality tradeoff.
Supported Formats
The compressor accepts JPG/JPEG (photographs, complex images), PNG (screenshots, graphics, images with transparency), and WebP (modern format with superior compression). You can convert between formats during compression - for example, converting PNG screenshots to JPG typically reduces size by 60-80% with minimal visible difference.
WebP format offers the best compression ratios for both photographic and graphic content. Converting to WebP can save 25-35% compared to equivalent-quality JPEG. Most modern browsers and platforms support WebP, making it an excellent choice for web content.
Common Use Cases
Website optimization: large images are the primary cause of slow page loads. Compressing images before uploading to your website dramatically improves load times and user experience. Email attachments: many email providers limit attachment sizes to 25 MB. Compress photos before attaching to ensure delivery. Social media: pre-compressing images gives you control over quality rather than letting platforms apply their own aggressive compression.
Discord uploads: free users have an 8 MB file size limit. Compress large screenshots or artwork to share them in Discord channels without Nitro. Cloud storage: reduce the space your photo library consumes by compressing images you do not need at full resolution.
Tips for Best Results
For photographs, JPEG quality between 75-85% provides an excellent balance of file size and visual quality. Most viewers cannot distinguish between 85% and 100% quality in normal viewing conditions. For text-heavy screenshots, PNG or WebP with lossless settings preserve crisp text edges.
Only resize to dimensions you actually need. If your website displays images at 800 pixels wide, there is no benefit to uploading 4000-pixel originals. Match your output dimensions to the display context for optimal file sizes.
Frequently Asked Questions
Will compression make my image look bad? At quality settings of 70% and above, the quality difference is usually imperceptible in normal viewing. Only at very low quality settings (below 50%) does degradation become obvious.
Can I compress images in bulk? You can process multiple images by compressing them one at a time with the same settings. Each compression is independent and instant.
Does compressing remove metadata? Yes, the compression process strips EXIF metadata (camera settings, GPS location, date taken). This can be beneficial for privacy when sharing photos online.
What is the best format for web images? WebP offers the best compression for web use. Use JPEG for photographs if WebP compatibility is a concern, and PNG only when you need transparency or pixel-perfect text rendering.