Image Compressor

What is Image Compression?

Image compression reduces file size by re-encoding an image at a lower quality level or using a more efficient format. Large image files slow down web pages, increase bandwidth costs, and hurt search engine rankings. By compressing images before uploading them, you can significantly improve page load times without a noticeable loss in visual quality. This tool uses the browser's built-in Canvas API to compress images entirely on your device. JPEG and WebP formats support lossy compression with an adjustable quality slider, while PNG uses lossless compression.

How to Use This Tool

Drag and drop an image onto the upload area, or click to select a file from your device. The tool accepts PNG, JPEG, and WebP formats. Choose your desired output format and adjust the quality slider. Lower values produce smaller files but may introduce visible artifacts. Click "Compress Image" to process the file. A side-by-side preview shows the original and compressed versions, along with file size savings. Download the compressed image when you are satisfied with the result.

Common Use Cases

• Optimizing images for web pages to improve Core Web Vitals and page speed scores
• Reducing file sizes for email attachments that have size limits
• Preparing images for social media platforms with upload restrictions
• Batch-converting PNG screenshots to smaller JPEG or WebP files

Why Use a Client-Side Tool?

Your images never leave your device. All compression is performed locally using the Canvas API built into your browser. There are no uploads, no server-side processing, and no risk of your files being stored or accessed by third parties. The tool works offline and processes images instantly without waiting for network round-trips. This makes it ideal for compressing sensitive screenshots, personal photos, or proprietary design assets.

Frequently Asked Questions

What is the best quality setting for web images?

For most web use cases, a quality of 70 to 85 provides a good balance between file size and visual quality. At 75%, images are typically 50-70% smaller with minimal visible difference. Use higher values for hero images and lower values for thumbnails.

Which image format should I choose?

WebP generally produces the smallest files with the best quality and works in all modern browsers. JPEG is ideal for photographs. PNG is best for images with text, sharp edges, or transparency since it uses lossless compression.

Are my images uploaded to a server?

No. All compression happens in your browser using the Canvas API. Your files never leave your device, and no data is sent to any external server.