Free Image Compressor & Resizer (No Upload Limits)

Large image files can severely slow down your website, ruin your SEO rankings, and prevent you from sending email attachments. Our free Image Compressor & Resizer operates entirely within your browser. Because your files are processed locally on your device and never uploaded to an external server, your privacy is 100% guaranteed, and there are absolutely no file size limits!

How to Optimize Your Images

1. Upload Your File: Click the upload box to select a JPEG, PNG, or WebP image from your computer or phone.
2. Resize Dimensions (Optional): If your photo is massive (like a 4000px camera original), you can shrink the physical dimensions to reduce file size. Leave the "🔗 Maintain Aspect Ratio" box checked to ensure your image doesn't stretch or warp.
3. Choose Output Format: For general photography, select JPEG. If you are uploading to a website, select WebP for maximum SEO performance. If your image has a transparent background, you must select PNG.
4. Adjust Quality: Use the Compression slider to reduce the file size. 80% is the industry standard—it provides massive file size savings while keeping the image looking indistinguishable from the original.
5. Download: Watch the "File Optimization Stats" box calculate your savings in real-time. Once you are happy with the size, click "Download Image".

The Mathematical Calculations

Our tool uses standard mathematical algorithms to process your files locally. If you are curious about how the numbers in the results box are generated, here are the formulas:

• Aspect Ratio Constraints: When "Maintain Aspect Ratio" is checked, changing the Width automatically calculates the new Height using the formula: New Height = New Width × (Original Height / Original Width).
• Compression Ratio: Your total savings percentage is calculated using the formula: ((Original Size - New Size) / Original Size) × 100.