Image format requirements pop up constantly: a CMS that accepts WebP but not PNG. A client who needs JPG rather than the PNG you exported from Figma. A system that rejects transparent PNGs and requires a white-background JPG. An older platform that only accepts BMP. Converting between image formats should take ten seconds, not ten steps. The Utility Spark Image Converter handles the four most common web image format conversions — JPG, PNG, WebP, and BMP — entirely in your browser. Select your input file, choose your target format, and download the converted image. The HTML5 Canvas API handles the transcoding locally: no upload, no cloud processing, no account. An important caveat to understand before converting: JPG does not support transparency. If you convert a transparent PNG to JPG, the transparent areas will be filled with a solid colour (white by default). If transparency is critical to the output, convert to PNG or WebP instead — both support an alpha channel.
lightbulb When to use this tool
- check_circle Converting a PNG export from Figma or Sketch to JPG for a client who needs a smaller file for email.
- check_circle Converting a JPG photograph to PNG to preserve quality for graphic design layering.
- check_circle Converting images to WebP format to serve modern, bandwidth-efficient images on a website.
- check_circle Converting a transparent PNG to JPG (with white background fill) for platforms that reject PNG uploads.
- check_circle Converting BMP files from Windows applications to JPG or PNG for web use.
Why use our tool?
Four Major Formats — JPG, PNG, WebP, BMP
Covers the most common image format conversion needs: JPG for compressed photography, PNG for lossless images with transparency, WebP for modern efficient web images, and BMP for Windows application compatibility. The output format is fully controlled by your selection.
Local Conversion — Your Images Never Touch a Server
The HTML5 Canvas API draws the source image and exports it to the target format entirely in browser memory. Image conversion services like Convertio or CloudConvert upload your file to remote servers for processing. This tool has no server-side component — format conversion is instantaneous and completely private.
Quality Control for JPG Output
When converting to JPG, a quality slider lets you control the output compression level (0.1 to 1.0). Higher quality produces larger files with less compression artefact; lower quality produces smaller files. This gives you direct control over the file size versus visual quality trade-off.
Transparency Handling with Clear Disclosure
PNG and WebP support transparency; JPG and BMP do not. When converting from a format with transparency to one without, the tool fills transparent pixels with a white background by default, so the output is not corrupted by black or garbled areas. This behaviour is disclosed before conversion so there are no surprises.
Instant — No Upload, No Queue
Cloud conversion services depend on server availability and queue depth. This tool converts at the speed of your local hardware — typically under a second for any standard web image. There is no network dependency after the initial page load.
How it works
Click 'Upload Image' or drag your source image (JPG, PNG, WebP, or BMP) onto the tool area.
Select your target format from the format dropdown: JPG, PNG, WebP, or BMP.
If converting to JPG, set the output quality using the quality slider (0.8–0.9 is recommended for most use cases).
The tool previews the converted image in real time. Check the output dimensions and estimated file size.
Click 'Download Converted Image' to save the output file in your chosen format.
Examples
science Figma PNG Export → JPG for Email Sharing
Input: design-mockup.png — 1920×1080px, 2.4MB, white background (no transparency)
Target format: JPG, quality 0.85
Output: design-mockup.jpg — 1920×1080px, 380KB
Result: 84% smaller, suitable for email attachment, visually identical at screen resolution
science JPG Photo → WebP for Website Performance
Input: hero-photo.jpg — 1200×800px, 520KB
Target format: WebP
Output: hero-photo.webp — 1200×800px, 180KB
Performance impact: 65% smaller, faster page load, better Core Web Vitals LCP score — serving WebP is a direct PageSpeed Insights recommendation