Image Compressor
Optimize image file sizes with real-time compression quality controls and instant format conversion in your browser.
Select Image to Compress
Upload a JPG, PNG, or WebP image to reduce file size.
JPG, PNG, WebP • Max 20 MB
Client-Side Image Compression
Reduce image sizes directly in your browser without uploading files to external servers.
WebP offers the greatest size reduction while preserving visual sharpness and transparency.
Your images remain on your device at all times.
Privacy: Your image is processed locally in your browser. OfficeKit does not upload or store the image you select in this tool.
Review Notice: Check visual fidelity and file size trade-offs before deploying compressed images.
Compression Standards & Format Specifications
Understand how different image formats handle compression quality, transparency, and artifact reduction.
WebP & JPEG Quality Scaling
WebP and JPEG support fine-grained lossy compression algorithms. Quality settings between 75% and 85% typically reduce file sizes by 40–80% without noticeable visual degradation.
PNG Transparency & Lossless Encoding
Browser Canvas encodes PNG using lossless deflate algorithms, so lossy quality sliders do not affect PNG file size. To compress PNGs effectively, convert them to WebP.
Honest Size Metrics
Re-compressing already heavily optimized images can occasionally produce slightly larger files. OfficeKit displays neutral size comparisons so you always retain full control.