When PNG is the better export
Use PNG when you need cleaner edges, UI screenshots, or input for OCR. HEIC is efficient on iPhone; PNG is easier for tools that dislike HEIC or aggressive JPG compression.
Same Workspace, different preset
Open your HEIC photos with PNG already selected, then review image quality and privacy settings before exporting locally.
Local only
Photos are converted in the browser. Nothing is uploaded for the convert step.