Image Format Converter & Resizer
Free online image converter. Convert images to JPG, PNG, WebP, BMP, ICO formats. Resize and crop images while maintaining aspect ratio. All processing is done locally, no upload required.
Convert Image Format
Drop image here
or click to select file
Image preview will appear here
Original Size
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Output Size
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Format
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About Image Formats
JPG vs PNG vs WebP
JPG is ideal for photos with lossy compression. PNG supports transparency and lossless compression, perfect for graphics. WebP offers superior compression with both lossy and lossless modes, reducing file sizes by 25-35% compared to JPEG/PNG.
When to Use BMP and ICO
BMP is an uncompressed format used in Windows applications and legacy systems. ICO format is specifically designed for Windows icons and favicons, supporting multiple sizes in a single file for optimal display at various resolutions.
Image Optimization Tips
For web use, resize images to display dimensions and use WebP format for best performance. Set quality to 80-85% for photos to balance file size and visual quality. Use PNG only when transparency is needed.