Image converter

A worked example

Choose PNG or WebP when transparency needs to survive conversion.

A transparent PNG
Output format: JPEG; quality: 80

A JPEG with the same pixel dimensions; transparent areas become white.

Image workflow and quality guide

Choose a format for your image

PNG preserves the rendered pixels without lossy encoding and supports transparency, but photographs may be large. JPEG suits opaque photos; this tool fills transparent areas with white. WebP supports transparency with adjustable lossy quality. Browser export support is checked; unsupported formats return an error.

Conversion is not restoration

Converting a JPEG to PNG does not recover detail already lost to JPEG compression. Pixel dimensions stay the same. Canvas re-encoding does not preserve original metadata or animation; keep your originals if you need camera metadata or multiple frames.

Check alpha and actual bytes

For a transparent PNG exported as JPEG at quality 80, the expected result has the same dimensions and a white background. Use PNG or WebP to retain transparency. Compare the decoded result preview and byte report: a new format can be larger, not smaller.

Batch results and ZIP contents

The same settings apply to every selected image. Review each result: a batch may contain both successful and failed files. The ZIP includes successful images and results.txt with the report; it does not silently include failed originals. Batch output is bounded to 100 MB. If a limit is reached, use smaller batches. ZIP packaging does not add image-quality loss.

Choose your next step: resize dimensions, change image format, compare compression or rotate and mirror. Download the result before opening it in another tool.