Compress Images Online
Universal service for compressing any images. Support JPG, PNG, WebP, GIF, SVG formats.
JPG, PNG, WebP, GIF, SVG, AVIF
Drag and drop your file here or click to select
Popular Compression Formats
What Is Image Compression?
Image compression is the process of reducing the file size of digital images while preserving acceptable visual quality. There are two main approaches: lossy compression (JPEG, WebP, AVIF) removes some image data that the human eye barely notices, achieving significant size reductions of 50-80%. Lossless compression (PNG with OxiPNG) rearranges data more efficiently without any quality loss. Convertilo uses WebAssembly-powered codecs — MozJPEG, libwebp, libavif, imagequant, and SVGO — to deliver professional-grade compression directly in your browser, with no server uploads required.
Image Format Comparison
Each image format has unique strengths. Choose the right format based on your needs:
| Format | Best For | Transparency | Animation | Compression | Browser Support |
|---|---|---|---|---|---|
| JPEG | Photographs, complex images | No | No | Lossy (up to 53%) | Universal |
| PNG | Graphics, screenshots, logos | Yes | No | Lossless/Lossy (up to 75%) | Universal |
| WebP | Web images, all-purpose | Yes | Yes | Both lossy and lossless | 95%+ browsers |
| AVIF | Maximum compression, modern web | Yes | Yes | Best ratio (up to 59%) | 90%+ browsers |
| GIF | Simple animations, memes | Limited (1-bit) | Yes | Lossy (up to 75%) | Universal |
| SVG | Icons, logos, vector graphics | Yes | CSS/JS | XML optimization (42%) | Universal |
Technology Behind Our Image Tools
Convertilo uses cutting-edge WebAssembly (WASM) technology to bring professional image processing directly to your browser. Instead of uploading files to a server, we run industry-standard codecs locally on your device:
MozJPEG — Mozilla's advanced JPEG encoder achieving up to 53% compression — the same technology used by major CDNs and image optimization services.
imagequant + OxiPNG — The combination of lossy quantization and lossless PNG optimization, reducing PNG files by up to 75% while maintaining visual quality.
libwebp — Google's WebP codec for encoding and decoding WebP images with support for both lossy and lossless compression.
libavif — The next-generation AVIF codec based on AV1, achieving up to 59% compression — the most efficient modern image format.
Gifsicle — Specialized GIF optimizer that preserves animation while reducing file size by up to 75% for static and 27% for animated GIFs.
SVGO — SVG optimization tool that parses and simplifies SVG markup, achieving 42% average size reduction through multipass processing.
All codecs are compiled to WebAssembly and run entirely in your browser — your images never leave your device.
About Image Compression
Image compression is the process of reducing file size while maintaining visual quality. Our online compressor uses advanced algorithms to optimize images for web use, storage saving and faster loading.
Compression Algorithms
- Lossy compression for JPG and WebP formats
- Lossless optimization for PNG images
- Smart quality control with minimal visual impact
- Advanced color palette optimization for GIF
Benefits of Our Compression Service
Free Unlimited Compression
No restrictions or limits - compress as many images as you need without any fees or subscriptions.
Secure Browser Processing
All processing happens locally in your browser. Your files never leave your device, ensuring complete privacy.
Smart Quality Algorithms
Advanced compression algorithms provide optimal balance between file size reduction and visual quality preservation.
Frequently Asked Questions About Compression
How much can file size be reduced without quality loss?
Compression level depends on format and image content. Typically: JPG - up to 90%, PNG - up to 70%, WebP - up to 50%, while maintaining acceptable visual quality.
What image formats are supported for compression?
Our compressor supports all popular formats: JPG/JPEG, PNG, WebP, GIF (including animated), and SVG. Each format is optimized using specific algorithms.
Is it safe to upload images to the site?
Absolutely safe. All processing happens locally in your browser. Images are never uploaded to our servers and are automatically deleted after compression.
How fast is the compression process?
Compression is instant since all processing happens in your browser. No upload time required - just select files and get results immediately.