.jpg .heic

Convert JPG to HEIC on Mac

A large JPG photo library quietly eats gigabytes of disk space. HEIC — Apple's High Efficiency Image format — stores the same photo at roughly half the size with no visible quality loss. Converting JPG to HEIC on your Mac reclaims storage across thousands of photos while keeping everything native to Photos, Preview, and the rest of the Apple ecosystem.

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Why convert JPG to HEIC?

Cut photo storage roughly in half with no visible quality loss
Native to Apple Photos, Preview, and iCloud — no compatibility friction on Mac or iPhone
Batch convert an entire JPG library in a single pass
Preserves EXIF metadata: date, GPS location, and camera settings
All processing happens locally on your Mac — nothing uploaded
Drag and drop folders straight from Finder

JPG vs HEIC file sizes

File Type	JPG	HEIC	Note
iPhone photo saved as JPG (12MP)	3.5 MB	1.8 MB	49% smaller
DSLR JPG export (24MP)	8.2 MB	4.1 MB	50% smaller
Scanned/edited JPG	5.0 MB	2.6 MB	48% smaller

Conversion speed: 1,000 JPG photos in ~3 minutes on Apple Silicon

When to convert JPG to HEIC

Reclaiming storage on your Mac

A large JPG library can take twice the disk space it needs. Batch convert to HEIC to free up gigabytes without deleting a single photo.

Standardizing on the Apple ecosystem

If your photos live in Apple Photos and iCloud, HEIC is the efficient native format. Convert older JPG imports to match the rest of your library.

Fitting more photos on iCloud

Smaller files mean more photos within your iCloud storage tier. Convert JPG to HEIC before syncing to stretch your plan further.

Archiving efficiently

For long-term storage on a Mac or NAS, HEIC keeps quality while halving the footprint compared to JPG.

How to convert JPG to HEIC on Mac

Open Picmal

Download and open Picmal on your Mac.

Add your JPG files

Drag and drop your JPG files or entire folders into Picmal.

Select HEIC and convert

Choose HEIC as the output format and click Convert.

JPG vs HEIC

.jpg

JPG

Joint Photographic Experts Group

The most widely supported image format, standardized as ITU-T T.81 in 1992. JPG (also called JPEG) is compatible with virtually every device and application, and remains the universal default for photographic content.

Best for

Sharing photos, web uploads, and email attachments

.heic

HEIC

High Efficiency Image Container

Apple's default photo format since iOS 11. Based on the HEVC (H.265) codec standardized by ISO/IEC 23008-12, HEIC offers up to 50% better compression than JPEG at equivalent visual quality.

Best for

iPhone photos and Apple ecosystem storage

Frequently asked questions

How do I convert JPG to HEIC on Mac?

Open Picmal, drag your JPG files or folders into the window, select HEIC as the output format, adjust quality if needed, and click Convert. Everything is processed locally on your Mac.

How much storage does converting JPG to HEIC save?

Typically 40–50%. A 3.5MB JPG photo usually becomes about 1.8MB as HEIC at equivalent quality. Across a library of thousands of photos, that adds up to gigabytes reclaimed.

Does converting JPG to HEIC lose quality?

HEIC uses more efficient compression than JPG, so at matched quality settings the difference is not visible to the eye. Note that converting an already-compressed JPG won't recover detail JPG previously discarded — but it won't add visible loss either.

Will HEIC files open everywhere?

HEIC opens natively on macOS (High Sierra and later), iOS, and iPadOS. Windows needs a free codec, and some non-Apple apps don't support it — so keep HEIC for storage on Apple devices and convert to JPG when sharing externally.