Client-Side Image Compressor
Compress JPG, PNG, and WebP images directly in your browser. Configurable quality factor, instant preview, zero data loss to external servers, and accurate file size calculations.
Select Source Image
Processed in browserDrop an image here
or click to browse from your device
Compression Results
Awaiting inputUpload an image and click Compress to evaluate size reduction
Results, statistical ratios, and detailed amortization ledgers will appear here once values are provided.
Calculation Methodology & Formula
Renders source pixels to an in-memory HTML5 Canvas and serializes using browser-native DCT (Discrete Cosine Transform) for JPEG and predictive transform coding for WebP. Quality factor controls quantization tables.
Reduction (%) = ((OriginalBytes - CompressedBytes) / OriginalBytes) × 100Worked Example: High-Resolution Photography Compression
Compress a 4.2 MB JPEG photograph down to an optimized WebP for web delivery at 80% visual quality.
WebP predictive compression preserves high visual fidelity while discarding redundant high-frequency noise.
Technical Constraints & Limitations
- PNG format is lossless in HTML5 Canvas; the quality slider applies to lossy compression formats (WebP and JPEG).
- Images exceeding 25 MB should be processed in smaller batches to avoid exceeding mobile browser canvas allocation limits.
Frequently Asked Questions
Are my images uploaded to any server or cloud API?
What is the best format for maximum web compression?
Related Utilities & Calculators
Base64 to Image / Image to Base64
Encode images into Base64 Data URLs and decode strings into real images.