What is the short answer?
Open the HEIC converter in a current Windows browser, add up to 15 iPhone photos, keep JPG selected, inspect each preview and download the converted files or ZIP.
When do you need a JPG copy?
Windows can open HEIC when the required extensions are installed, but older editors, upload forms and recipients may still expect JPG. Convert for compatibility, not because the HEIC original is damaged.
How do you convert a batch?
Add HEIC or HEIF files together, choose JPG and start conversion. Each file runs independently, so one unsupported or damaged file does not stop the rest. The browser-based decoder keeps the workflow on your device.
What should you inspect?
Compare orientation, width, height and visible color with the source. Portrait photos should remain upright. Open one downloaded JPG in the exact Windows app or website that rejected the HEIC file before processing a large archive.
Should you delete the HEIC originals?
No. Keep originals because conversion to JPG creates a new lossy file and may not preserve every item of metadata. Store converted copies in a separate folder with recognizable filenames.
How can you avoid the issue next time?
Apple devices can transfer media in a compatible format under some settings, and Windows may open HEIF through supported extensions. Choose the approach that fits your archive. Conversion remains useful when a specific destination explicitly requires JPG.
Which sources support this guide?
These primary references support the format, browser-processing and output guidance above. CollagePlus also tests each workflow against the current tool.