Online Image Editor
Compress, resize, convert, and process images online. Support for JPG, PNG, WebP, GIF, SVG, and other formats.
About Image Editor
Our image tools help you compress, resize, convert, crop, and round images directly in your browser. Powered by WebAssembly codecs including MozJPEG, libwebp, imagequant, OxiPNG, and libavif, we deliver professional-grade results: up to 53% compression for JPEG, 75% for PNG, and 59% for AVIF β all without uploading a single file to any server.
All operations are performed locally on your device using cutting-edge WASM technology, ensuring complete privacy of your images. No registration required, no file size limits, and no watermarks. Whether you're optimizing images for a website, preparing photos for social media, or converting between formats β everything runs instantly in your browser tab.
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 β MozJPEG, libwebp, libavif, imagequant, and SVGO β 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:
All codecs are compiled to WebAssembly and run entirely in your browser β your images never leave your device.
Benefits
Privacy
Images are processed 100% locally in your browser using WebAssembly. No files are uploaded to any server, and no third-party services have access to your data. Your photos remain completely private.
Multiple Formats
Full support for JPG, PNG, WebP, GIF, SVG, AVIF, and HEIC formats. Each format uses its own optimized codec: MozJPEG for JPEG, imagequant for PNG, libwebp for WebP, Gifsicle for GIF, and SVGO for SVG.
High Quality
Our WASM codecs deliver results comparable to desktop applications. MozJPEG achieves 53% compression on JPEG, imagequant reduces PNG by up to 75%, and libavif saves 59% on AVIF β all while maintaining excellent visual quality.
FAQ
Where are my images uploaded?
Nowhere! All images are processed entirely in your browser using WebAssembly (WASM) technology. Your files never leave your device β no uploads, no cloud servers, no third-party access. This makes Convertilo ideal for handling sensitive or private images, as the processing happens 100% client-side.
Is quality lost?
We use industry-leading codecs like MozJPEG for JPEG (achieving up to 53% compression), imagequant + OxiPNG for PNG (up to 75% reduction), and libavif for AVIF (up to 59% savings). These are the same algorithms used by major tech companies. You control the quality slider to find the perfect balance between file size and visual fidelity.
Are there any limits?
No, there are no limits on the number of images, file size, or daily usage. Since all processing happens in your browser using WebAssembly, there's no server load to restrict. You can batch-process hundreds of images β the only limiting factor is your device's available memory.