What Is an Image Converter?
The Image Format Converter changes a picture from one format to another — PNG, JPEG or WebP — right in your browser, with an optional quality setting for the lossy formats.
An image converter changes an image from one file format to another — for example, from PNG to JPEG, or from JPEG to WebP. Different formats have different strengths: JPEG is universal but lossy; PNG is lossless and supports transparency; WebP is modern, smaller and supported by all current browsers; AVIF is next-generation with even better compression. Choosing the right format for the right context reduces file size, improves load speed and maintains visual quality.
Converting Formats
- Drop an image or click to upload it.
- Pick the output format (PNG, JPEG or WebP) and, for JPEG/WebP, a quality level.
- Check the output size and download the converted file.
When to Convert
- Converting PNG screenshots or illustrations to JPEG or WebP for smaller file sizes on the web.
- Converting JPEG photos to WebP for use in modern web projects that serve multiple formats.
- Converting any image to PNG to preserve transparency or when a lossless format is required.
- Batch-converting images to the same format before uploading to a CMS, CDN or design tool.
How Image Format Conversion Works
The tool draws the source image on an HTML Canvas and then exports it in the target format using canvas.toBlob('image/jpeg'), canvas.toBlob('image/png') or canvas.toBlob('image/webp'). The browser's own codec handles the encoding. This approach is universal — any image the browser can render (JPEG, PNG, WebP, GIF, SVG, BMP, AVIF) can be converted to any format the browser can encode.
For JPEG and WebP, you can control the output quality (0–100%). For PNG the encoding is lossless, so quality is not applicable. Converting from a lossy format (JPEG) to a lossless format (PNG) does not recover lost detail — the PNG will be larger but with exactly the same visual quality as the JPEG input.
Advantages
- Convert PNG screenshots to WebP or JPEG to shrink them for the web.
- Turn a photo into PNG when you need lossless quality or transparency.
- Runs entirely in your browser — your image stays private.
Image Conversion on Your Machine
Image format conversion is performed using JavaScript canvas APIs that run in your browser. The images you upload and convert remain entirely on your device — no image data is transmitted to our servers.