Image Converter & Optimizer (Bulk JPG, PNG, WebP, BMP)
Convert image formats between JPG, PNG, WebP, and BMP. Bulk compress file sizes, resize dimensions by percentage or exact pixels, and download as ZIP.
Upload Images to Convert, Drag Crop & Enhance
About This Tool
Image Converter & Optimizer is a high-speed, 100% private browser-based image toolkit. Bulk convert between JPG, PNG, WebP, and BMP formats without uploading photos to external servers.
Compress image file sizes with precision quality sliders or target exact size ceilings (e.g. 50 KB, 100 KB, 200 KB, 500 KB, 1 MB). Resize dimensions by percentage (25%, 50%, 75%, 200%) or exact pixel widths and heights with aspect ratio preservation.
Supports batch conversion for up to 50 images simultaneously with instant 1-click ZIP archive packaging.
How to Use
Upload Images
Drag and drop one or multiple JPG, PNG, WebP, BMP, or SVG photos.
Choose Target Format
Select your preferred output format: WebP (modern web), JPG, PNG, or BMP.
Set Quality or Dimensions
Adjust compression quality, enter target KB limit, or scale pixel dimensions.
Process and Download
Click Process Images to convert all files and download individually or as a ZIP.
Use Cases
Web Performance Optimization
Convert heavy PNGs and JPGs into lightweight next-gen WebP images to speed up website load times.
Government & Portal Submissions
Compress passport photos and ID cards to fit strict 50 KB / 100 KB upload limits.
E-commerce Product Catalogs
Bulk resize product photography to standard square or Full HD dimensions in seconds.
Frequently Asked Questions
Which image format provides the smallest file size?
WebP typically provides 25-35% smaller file sizes than JPEG at equivalent visual quality while also supporting transparent backgrounds.
Can I set an exact target file size in KB?
Yes! Select the Target Exact KB option and enter your desired limit (e.g. 100 KB). The engine will iteratively calibrate quality and sampling to stay under your ceiling.
Are my images kept private?
Yes! All format conversion, compression, resizing, and ZIP packaging happen directly in your browser using WebAssembly and HTML5 Canvas.