Image Converter
Convert still images between JPG, PNG, and WebP in your browser. Preview transparency and file size, then download without uploading your image.
How to use Image Converter
- Choose a still JPG, PNG, or WebP image.
- Select JPG, PNG, or WebP output. For JPG and WebP, adjust quality if needed; the default is WebP at 90% quality.
- Select Convert image, inspect the result and file size, and download the converted file.
What is Image Converter?
Image formats encode the same picture in different ways. JPG is commonly used for photographs and has no transparent pixels. PNG uses lossless encoding and supports transparency. WebP supports transparency and, in this tool, uses lossy encoding with an adjustable quality. Conversion keeps the source pixel dimensions but can change appearance, file size, metadata, and transparency depending on the selected format.
- JPG, PNG, and WebP output
- Adjustable quality for JPG and WebP
- Transparent PNG/WebP previews on a checkerboard
- Actual output format, dimensions, and file size
Supported images and limits
Choose one still JPG, PNG, or WebP image at a time. Each file can be up to 20 MiB, with no more than 25 million pixels and no side longer than 8192 pixels. Animated PNG and WebP files are rejected, as are GIF, SVG, HEIC, and other unsupported formats. Available memory and export support can impose additional limits on your browser or device.
Local processing and exported files
Your image is read and processed on this device. ADEMN does not upload it, store an image history, or include its contents, filename, or dimensions in tool analytics. Replacing the image, resetting the tool, or leaving the page releases the workspace's image resources; downloaded files remain wherever you saved them.
The tool creates a new image from the decoded pixels. Photos are decoded using their stored orientation, and the original EXIF metadata is not copied into the result. Encoding, color handling, and output size can vary by browser. JPG output fills transparent regions with white; PNG and WebP output preserve transparency.
A practical example
An 800 × 600 transparent PNG Output: JPG · Quality: 90%
An 800 × 600 JPG Transparent regions become white; actual file size is shown after conversion.
Frequently asked questions
What happens to transparency when I choose JPG?
JPG does not support transparent pixels. The tool fills transparent regions with white before encoding the JPG. PNG and WebP output preserve transparency supported by the decoded source.
Does converting a JPG to PNG improve its quality?
No. PNG cannot restore detail already lost in the JPG. It stores the decoded pixels using lossless encoding, which may make the file much larger without adding detail.
Are GIF, HEIC, SVG, or animated images supported?
No. The first version accepts still JPG, PNG, and WebP only. Animated PNG and WebP are detected and rejected so that an animation is not silently flattened into a still frame.
Why can a browser fail to export a format?
Export support and available memory vary by browser and device. The tool checks the actual format returned by the encoder and reports a failure instead of downloading a file with the wrong extension. Try another available format or smaller dimensions.