Convert HEIC to JPG.
The iPhone saves photos as HEIC, which is light but doesn't open everywhere. Apolo opens them and turns them into JPG, WebP or AVIF.
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Why HEIC is hard to open
HEIC has been the iPhone's format for years: it's light, but many websites, apps and Windows or Linux computers can't open it without adding something. Turning it into JPG fixes that; into WebP or AVIF, it also weighs less.
With the app
- Drag the HEIC onto Apolo, on Mac, Windows or Linux: it opens without installing anything else.
- Choose JPEG so it opens everywhere, or WebP or AVIF if it's going to a website.
- Export. For a whole folder of phone photos, use Batches.




How much each option weighs
With libheif's sample photo (701 KB as HEIC), at a score of 80 you can't tell apart side by side: as JPEG, 350 KB (50% less); as WebP, 289 KB (59% less), and as AVIF, 252 KB (64% less). The score is measured against the opened HEIC, which is already a compressed photo.
From the terminal
A folder of iPhone photos to JPG, without it showing
apolo lote iphone-photos/ --formato jpeg --objetivo 90
To WebP, for a website
apolo lote iphone-photos/ --formato webp --objetivo 80 --lado-mayor 2048
Or stop the iPhone saving HEIC
On the iPhone, Settings › Camera › Formats › “Most Compatible” saves new photos as JPG. They weigh more, and the ones you already have stay HEIC.
Keep reading
- Convert images to WebPOne photo or a whole folder, with the app or the terminal, and how much you really save.
- AVIF, WebP or JPEG XLHow much each format weighs at the same quality, measured on 24 photos, and which to choose depending on where the image goes.
- Compress without losing qualityLossless or with a loss you can't see: what each path saves and how to know it doesn't show.