First frame; use frames tool for all.

Convert to PNG

Unified export to PNG from common formats.

Select or drop imageMulti-format input; output is always PNG.

Animations export first frame only. Transparent areas composited onto white for JPEG. Processing is local.

Notes

HEIC and some vendor formats may not decode in the browser—convert to JPG in your OS first.
Very large images use more memory; if conversion fails, resize or split.