Image Compressor
Reduce image file size with adjustable quality. Operates 100% locally in your browser for absolute security.
Drag & Drop Image Here
Supports JPEG, PNG, WebP, BMP
Upload an image to see details and live preview
How to Use Image Compressor
- Select or drag-and-drop your image (JPEG, PNG, or WebP) into the upload area.
- Adjust the 'Compression Quality' slider. A lower value yields a smaller file size but reduces quality, while a higher value keeps details crisp.
- Observe the live original vs. compressed file sizes and preview the image quality immediately.
- Review the savings percentage (e.g., 'Reduced by 60%').
- Click the 'Download Compressed Image' button to save the optimized file.
Key Features & Privacy Guarantee
- Real-time Preview: Compare quality and file size differences as you slide the controls.
- 100% Client-Side: Processing is done locally in your browser canvas. No images are sent to any server, keeping your data confidential.
- Substantial Savings: Dramatically reduce asset load sizes to speed up website speeds and SEO rankings.
- Auto-Format Mapping: Smart fallback that converts heavy PNGs to lightweight compressed JPEGs if needed.
Frequently Asked Questions
How does client-side compression work?
When you load an image, your browser draws it onto an in-memory HTML5 canvas element. The canvas API then exports the image pixels at your custom quality rating (e.g. 0.8) to retrieve a compressed version, completely within your browser.
Will my images be uploaded to any server?
No, absolutely not. All processes happen locally on your computer/phone. This ensures zero data leaks and maximum security.
Can I compress transparent PNG files?
Yes. PNG files are lossless and do not support quality loss natively without dithering. To give you high file-size savings, our compressor converts transparent PNGs into compressed JPEGs on a solid background, or compresses them as WebP if supported.