How to Batch Convert HEIC Photos to JPG: Complete Guide
If you own an iPhone, most of your photos are stored in HEIC (High Efficiency Image Container) format. HEIC offers roughly 50% smaller file sizes than JPEG at the same quality — which is why Apple made it the default format starting with iOS 11. But HEIC compatibility is still limited. Windows PCs cannot open HEIC files without installing a paid codec. Many CMS platforms, email clients, and older apps do not support HEIC. When you need to share, upload, or archive photos, converting HEIC to universally-compatible JPG is often necessary.
The simplest approach is to adjust your iPhone settings: go to Settings > Camera > Formats and select 'Most Compatible.' New photos will be captured as JPEG. But this does not convert your existing HEIC photo library. For batch converting thousands of existing HEIC photos, you need an automated approach. Online batch converters are the quickest solution — no software to install and they work from any device.
When batch converting HEIC to JPG, first decide on your quality target. HEIC uses modern HEVC compression that preserves more detail than JPEG at equivalent file sizes. Converting to JPG at 90-95% quality preserves most visible detail while keeping files manageable. Lower quality settings (70-80%) produce smaller files suitable for web sharing, but fine details in portraits and landscapes may be noticeably softened. Use https://www.iamuu.com/image/convert/ to batch convert HEIC photos with adjustable quality settings.
Metadata preservation is important during conversion. HEIC files contain EXIF data — date taken, GPS location, camera settings, and orientation. When converting to JPG, ensure the converter preserves this metadata. Orientation data is particularly critical: HEIC files often store orientation as metadata rather than physically rotating the image data. A converter that ignores orientation metadata will produce sideways or upside-down JPGs.
Live Photos add another layer of complexity. A Live Photo is actually a HEIC still image paired with a MOV video file. When batch converting, you typically only want the still image. Most batch converters automatically extract the still frame from Live Photos, but always verify the output — some converters skip Live Photos entirely, leaving gaps in your photo library.
For very large photo libraries (10,000+ HEIC files), consider processing in batches of 500-1000 at a time. This lets you spot-check output quality between batches and avoids browser memory limitations. After each batch, delete the original HEIC files only after confirming the converted JPGs look correct. iCloud Photos users should be aware that deleting HEIC originals from your device also deletes them from iCloud — download the originals first, convert locally, then re-upload if needed.
The file size increase when converting from HEIC to JPG is significant — typically 50-100% larger for equivalent quality. A 1.5MB HEIC photo may become a 2.5-3MB JPG. If storage space is a concern, consider converting to WebP instead, which maintains HEIC-like compression efficiency with better compatibility than HEIC (all modern browsers support WebP). Use https://www.iamuu.com/image/convert/ and select WebP as the output format to get the best of both worlds — small files and broad compatibility.
For most users, the simplest workflow is: connect your iPhone to a computer or use iCloud to download the HEIC files, upload them to https://www.iamuu.com/image/convert/, select JPG at 90% quality, download the converted batch, and archive the HEIC originals as a backup. This gives you universally-compatible JPG files for daily use while preserving the space-efficient HEIC originals in case you need them later.