Image Compressor
Compress JPEG, PNG, and WebP images online. Reduce file size without losing quality. 100% client-side.
About the Image Compressor
Compress your images to dramatically reduce file size while maintaining visual quality. Whether you're optimizing images for a website, preparing email attachments, or saving storage space, our image compressor handles JPEG, PNG, and WebP formats. Adjust the quality slider to find the perfect balance between file size and image clarity. Maximum privacy — all compression runs locally in your browser.
What Is Image Compressor?
Image compression reduces the number of bytes needed to store a picture. It comes in two flavors: lossless compression (used by PNG) preserves every pixel exactly but achieves modest size reductions, while lossy compression (used by JPEG and WebP) discards visual information that the human eye is unlikely to notice, achieving far smaller files at the cost of irreversible quality loss. WebP, developed by Google, supports both lossy and lossless modes and typically produces files 25–35% smaller than JPEG at equivalent quality. Compression works in the browser using the HTML Canvas API: the image is drawn onto a canvas and re-exported with the chosen quality, optionally resized to smaller dimensions. Because this happens locally, your photos are never uploaded to a server.
How to Use
- Upload an image by clicking the file input or dragging an image onto it.
- Adjust the quality slider (lower values = smaller file but lower quality).
- Optionally set maximum width/height to resize the image during compression.
- Click 'Compress' to process the image — wait for the compression to complete.
- Compare original and compressed sizes, then click 'Download Compressed Image' to save.
Common Use Cases
- Optimizing product photos and hero images to improve page load speed
- Shrinking email attachments below mailbox size limits
- Preparing images for blog posts and CMS uploads with size caps
- Reducing mobile bandwidth usage for image-heavy landing pages
- Compressing screenshots before sharing in chat or documentation
Tips & Best Practices
- A quality setting of 0.7 typically reduces file size by 60-80% with minimal visible difference.
- For web use, compressing images below 100KB significantly improves page load speed.
- Set max width/height to 1200px for blog images — larger is rarely needed.
- This tool is especially useful for photographers, bloggers, and e-commerce site owners.
Frequently Asked Questions
Are my images uploaded to a server?
No. Compression is performed entirely in your browser using the Canvas API. The image never leaves your device, so it is safe to compress confidential or personal photos.
Does compression work for PNG with transparency?
Yes. PNG transparency is preserved. Because PNG is lossless, the size reduction comes mainly from resizing. If you need aggressive size reduction and can accept some quality loss, consider re-exporting the image as WebP.
What quality value should I choose?
For most photographs a quality between 0.6 and 0.8 looks nearly identical to the original while cutting file size by 60–80%. For screenshots and graphics with sharp edges, use 0.8 or higher to avoid visible artifacts.
Why is my compressed file sometimes larger than the original?
If the original was already heavily compressed or is a tiny image, re-encoding may add metadata overhead that exceeds the savings. This is normal; simply try a lower quality or a different format.
This image compressor runs entirely in your browser. No data is uploaded to any server. Your privacy is completely protected.
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