Image Resizer & Compressor
Client side HTML5 canvas image resizer and compressor. Adjust dimensions with aspect ratio lock and optimize file size without server uploads.
How to Use the Image Resizer & Compressor
- 1 Drag and drop an image (PNG, JPG, or WebP) or click to browse.
- 2 Adjust width and height sliders (keep aspect ratio locked for proportional scaling).
- 3 Select output quality (10% to 100%) and target format (WebP, JPG, PNG).
- 4 Click "Download Optimized Image" to save directly from browser memory.
Methodology & Algorithmic Standards
Draws the source image onto an offscreen HTML5 <canvas> element using bicubic interpolation, then calls canvas.toBlob() with hardware accelerated WebP/JPEG compression. Zero data ever touches a remote server.
Frequently Asked Questions
What image formats are supported? ▼
Supports PNG, JPEG/JPG, and WebP. You can convert between these formats upon download.
Are my confidential photos uploaded anywhere? ▼
Never. Processing happens strictly in client side browser memory via HTML5 Canvas. Your photos never leave your device.
Does aspect ratio lock preserve original proportions? ▼
Yes. When aspect ratio lock is enabled, updating the width automatically calculates the proportionate height, and vice versa.
Explore Related Image Edit Tools
Image Format Converter (PNG, JPG, WebP)
Convert images client side between PNG, JPEG, WebP, and BMP using hardware accelerated HTML5 Canvas with adjustable compression quality.
Image Color Palette Extractor
Extract dominant color clusters and HEX/RGB swatches from any photo or graphic client side via HTML5 canvas pixel sampling and median cut quantization.
Aspect Ratio Cropper & Dimension Presets
Crop photos and graphics client side to standard aspect ratios (1:1 Square, 16:9 Landscape, 9:16 Story/Reel, 4:5 Portrait) with interactive HTML5 canvas handles.