Image Compressor
Compress JPG, PNG and WebP images directly in your browser with an adjustable quality slider, format conversion, and real-time before/after size comparisons.
Upload an image to get started.
What is Image Compressor?
Image Compressor reduces image file sizes directly on your device to accelerate website page speeds, fit email attachment limits, and conserve storage space. By executing entirely inside your browser via the HTML5 Canvas API, your photos and graphics are re-encoded locally without uploading files to any external cloud server. The tool lets you adjust compression quality from 10% to 100% and choose between universal JPEG or modern high-efficiency WebP output formats. Note that compression is lossy: EXIF and camera metadata are stripped, animated images are flattened to their first frame, and JPEG conversion fills transparent areas with white since the JPEG format does not support alpha channels.
How to use Image Compressor
- 1Upload an image file (JPG, PNG, WebP, GIF, or BMP) by dragging it into the dropzone or clicking to browse.
- 2Select your desired output format: WebP for superior compression with transparency support, or JPEG for maximum compatibility.
- 3Adjust the Quality slider (70%–85% recommended) to balance compression savings with visual sharpness.
- 4Review the original and compressed file sizes and preview image side by side.
- 5Click "Download" to save the compressed image directly to your device.
Key features
Adjustable Quality Slider
Control lossy quantization from 10% to 100% to fine-tune visual fidelity against file size.
JPEG & WebP Export
Output to universal JPEG or modern lightweight WebP for optimal compression ratios.
Real-Time Size Comparison
Displays exact original and compressed byte counts with calculated percentage change.
Client-Side Canvas Processing
Processes images locally in browser memory without sending data to any external server.
Transparency Handling
Preserves alpha transparency in WebP, and cleanly flattens transparent pixels to white for JPEG.
Zero Installation Required
Runs instantly in modern web browsers across desktop, tablet, and mobile operating systems.
Examples & use cases
High-Resolution JPEG Photo (4.2 MB to 780 KB)
Compressing a 4.2 MB smartphone photo at 75% quality produces a 780 KB JPEG file with negligible visible difference, saving approximately 82% bandwidth.
Transparent PNG to Modern WebP (1.8 MB to 340 KB)
Converting a 1.8 MB transparent product PNG to WebP at 80% quality retains alpha transparency while reducing file size by 82%.
Small Icon or Already-Compressed File
Re-encoding an already optimized 20 KB image at 95% JPEG quality may result in an equal or slightly larger file due to DCT re-quantization.
Frequently asked questions
Helpful guides & tutorials
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