The best free HEIC-to-JPG converter for most people is image-cat: it batch-converts in your browser with no upload and no app install. CloudConvert handles more formats if you're fine uploading; on a Mac, Preview/Photos can export JPG natively.
HEIC is Apple's efficient photo format, but send one to a Windows user or upload it somewhere and it often just won't open. Converting to JPG fixes that. The questions that matter: does it batch, does it need an app, and do your photos get uploaded. We run a converter ourselves, so here's the straight version.
#1
image-cat
Built by us✓ Last verified 2026-06-27
Best for: Anyone on any OS who wants to batch-convert without uploading photos.
This is the exact case we built for: a folder of iPhone HEIC photos that won't open on a PC. Drop them in, batch-convert to JPG, done — no software install, and since it's local your photos aren't uploaded to anyone. Honest limit: converting changes the container, it can't add detail that HEIC didn't capture; and very large batches depend on your device's memory.
Our image-cat notes are first-hand because we build and operate it. External entries are not hands-on reviews; their facts were checked against the linked official product pages on 2026-07-11. No affiliate links appear on this page.
Ranking policy: fit determines the order, commissions do not, and operator ownership is disclosed wherever it applies.
FAQ
Why won't my HEIC photos open on Windows?
HEIC is Apple's default and Windows doesn't fully support it out of the box. Converting the photos to JPG makes them open anywhere. A browser converter does this without installing the codec packs Windows otherwise needs.
Will converting HEIC to JPG reduce quality?
JPG is lossy, so a conversion re-encodes the image and can lose a little quality, though usually it's not visible. The bigger trade-off is file size: JPG is often larger than the original HEIC at similar quality. For sharing and compatibility it's worth it.
Is it safe to convert photos online?
If the photos are private, prefer a converter that works locally in your browser so they aren't uploaded. image-cat processes on your device; many popular converters upload to a server, which is fine for non-sensitive images but worth knowing.
