Question 1

What is HEIC and why do iPhones use it?

Accepted Answer

HEIC (High Efficiency Image Container) is Apple's default photo format since iOS 11. It stores photos using the HEVC codec, producing files ~50% smaller than JPEG at the same visual quality. The downside: most non-Apple software can't open it — which is why you're here.

Question 2

Are my photos uploaded to a server?

Accepted Answer

Never. Conversion runs entirely in your browser using WebAssembly — the same technology that powers games and video editors on the web. Your files never leave your device. We have no servers that receive images.

Question 3

Why is the converted JPG sometimes larger than the original HEIC?

Accepted Answer

HEIC uses more efficient compression than JPEG. When converting HEIC to JPG at quality 85, the output is typically 30–80% larger — this is expected and correct. The visual quality is preserved. WebP to JPG usually shrinks files by 10–15%.

Question 4

Is there a file size or batch limit?

Accepted Answer

No hard limit — conversion runs in your browser's memory. Very large batches (500+ files, or files over 50 MB each) may be slow or trigger an out-of-memory warning on older devices. If that happens, process in smaller batches.

Question 5

What is EXIF data and is it preserved?

Accepted Answer

EXIF is metadata embedded in photo files: capture date, GPS coordinates, camera model, lens, ISO, shutter speed, and orientation. LocalJPG preserves all of this in every converted JPG. No data is stripped.

Question 6

How do I convert a whole folder of HEIC files?

Accepted Answer

Zip your folder into a .zip archive and drop it onto the converter. LocalJPG will extract all compatible images (WebP, HEIC, HEIF) and convert them in one batch. The ZIP download option lets you get all JPGs in a single archive for $0.50.

Question 7

How does the $0.50 ZIP download work?

Accepted Answer

Single files and per-file individual JPG downloads are always free. If you want all converted files as a single ZIP archive, a one-time $0.50 payment via TON cryptocurrency unlocks the download for 10 minutes — enough for multiple downloads. No account needed.

Question 8

Does it work offline?

Accepted Answer

Yes. After the first visit, LocalJPG caches itself as a Progressive Web App. You can convert files with no internet connection. The only features that need network are the ZIP payment flow and the optional donation widget.

	LocalJPG	Other converters
Account required	✗ No	Sometimes
Works offline	✓ Yes	✗ No
EXIF data preserved	✓ Yes	Sometimes
Batch conversion free	✓ Yes	✗ No

Convert ZIP to JPG

Why LocalJPG?

Convert a whole ZIP of iPhone photos at once

How ZIP conversion works — no upload involved

Downloading your converted JPGs

What file types are supported inside the ZIP?