Image Compressor
Upload images to compress them instantly in your browser. No server upload needed — your images never leave your device. Supports JPEG and PNG with adjustable quality. Compare before and after file sizes.
Drop an image here or click to browse
JPEG, PNG, WebP supported
How to Use the Image Compressor
- Click the upload area or drag and drop your image
- Adjust the quality slider to set compression level
- Preview the compressed result and compare file sizes
- Click Download to save the compressed image
What Is Image Compression?
Image compression reduces the file size of a picture by removing redundant or less important visual data. There are two main approaches: lossy compression discards information the human eye is unlikely to notice, while lossless compression reorganizes data without any quality loss.
Smaller images load faster, consume less bandwidth, and improve Core Web Vitals scores — all critical factors for search engine rankings and user experience. A single uncompressed hero image can add several megabytes to a page.
Modern compression algorithms let you achieve dramatic size reductions with virtually no perceptible quality difference, especially when you choose the right format and quality setting for each image.
Common Uses for Image Compression
Website Performance Optimization
Compress images before uploading to reduce page weight, speed up load times, and improve Lighthouse performance scores significantly.
Email Attachments
Shrink photos below email size limits so recipients can download them quickly without bouncing or clogging their inbox storage.
Social Media Uploads
Pre-compress images to avoid aggressive platform re-compression that often introduces visible artifacts and color banding.
Cloud Storage Savings
Reduce the size of photo libraries and backups to save on storage costs and speed up sync across devices.
Tips for Compressing Images
Target File Sizes for the Web
Aim for under 200 KB per image on web pages. Hero images can be up to 300 KB; thumbnails should stay below 50 KB.
Choose the Right Format
Use JPEG for photographs, PNG for graphics with transparency, and WebP when broad browser support is acceptable for best results.
Find the Quality Sweet Spot
JPEG quality between 70-85% offers the best balance of file size and visual fidelity. Below 60% artifacts become noticeable.
Resize Before Compressing
Downscale images to their display dimensions first. Compressing a 4000px photo only to display it at 800px wastes bytes.
Image Formats Compared
| Format | Best For | Transparency | Compression | Browser Support |
|---|---|---|---|---|
| JPEG | Photographs, complex scenes | No | Lossy | Universal |
| PNG | Graphics, logos, screenshots | Yes | Lossless | Universal |
| WebP | Web images (photos and graphics) | Yes | Both lossy and lossless | All modern browsers |