Image Compressor
Reduce image sizes up to 90% without losing visual clarity. 100% client-side compression for absolute privacy.
Drag and drop your image here
Supports JPEG, PNG, and WebP formats
100% Private In-Browser Tool
ZenixTools does not upload your image to any servers. All calculations and compressions run safely locally in your web browser.
No image selected
Upload a picture on the left to activate compression sliders, real-time preview, and local size calculation.
Image Compression & Web Optimization
Large, uncompressed image files are the #1 cause of slow websites and page abandonment. Compressing images optimizes LCP (Largest Contentful Paint) for Google's Core Web Vitals while preserving valuable cellular data for mobile readers.
Frequently Asked Questions
Is my image uploaded to any server?
No! The Image Compressor runs 100% locally in your web browser using HTML5 Canvas. Your images never leave your computer, ensuring absolute privacy and zero risk of data leakage.
Which formats are supported for compression?
You can upload JPEG, PNG, and WebP images. You can also output your compressed images in JPEG, PNG, or WebP formats, allowing you to easily convert image extensions on the fly.
How does the quality slider work?
The quality slider controls the compression level of lossy formats (JPEG/WebP) between 10% and 100%. A value around 75% to 85% typically reduces file size by 70% or more with virtually no visible difference in quality.
Can I resize the width and height dimensions?
Yes, you can scale the resolution slider from 10% to 100% of the original dimensions. Reducing the image width and height is highly effective for reducing file sizes for emails or website uploads.