Since iOS 11, iPhones save photos as HEIC by default. Windows, many websites, and older apps can't open them.
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Upload rejected
WordPress, Shopify, and many CMS platforms don't accept HEIC. You need standard JPEG to publish your images.
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Online converters are risky
Cloud-based converters upload your photos to unknown servers. For personal or client work, that's a privacy risk.
Three steps. That's it.
No settings to configure. No accounts to create.
1
Drop your HEIC files
Drag and drop individual files or entire folders. Karui accepts HEIC, HEIF, AVIF, and 5 other formats.
2
Karui converts + compresses
Files are converted to optimized JPEG using a next-gen compression engine. Resize too, if you want.
3
Done. Use anywhere.
Your JPEGs are ready — upload to any website, send by email, or use in any app. Universally compatible.
All formats in, JPEG out
HEICHEIFAVIFPNGWebP
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Optimized JPEG
Why Karui for HEIC conversion
Batch convert hundreds at once
Don't convert files one by one. Drop your entire photo library — Karui processes
hundreds of HEIC files simultaneously with its SIMD-optimized engine.
Convert + compress in one step
Most converters just change the format. Karui converts and compresses at the same time —
your HEIC photos become lightweight JPEGs ready for the web. Up to 90% smaller.
100% offline, 100% private
Your photos never leave your computer. No cloud uploads, no third-party servers.
Safe for personal memories, client work, and NDA-protected content.
Mac and Windows
Works on both platforms with the same experience.
Most HEIC converters are Mac-only — Karui works on Windows too.
Frequently asked questions
What is HEIC and why can't I open it?
HEIC (High Efficiency Image Container) is the default photo format on iPhones since iOS 11.
It creates smaller files than JPEG, but many apps, websites, and Windows systems don't support it natively.
Converting to JPEG makes your photos universally compatible.
Does converting HEIC to JPEG lose quality?
There is minimal quality loss. Karui uses a next-generation compression engine
that preserves visual quality while producing optimized JPEG files.
At quality 75-85, the difference is virtually imperceptible to the human eye.
Can I convert hundreds of HEIC files at once?
Yes. Drag and drop your entire photo folder — Karui batch converts all HEIC/HEIF files simultaneously.
The SIMD-optimized engine handles hundreds of images in seconds.
Is it safe? Are my photos uploaded anywhere?
Karui runs 100% offline on your computer. Your photos are never uploaded to any server.
Unlike online converters, there are zero privacy risks. Safe for personal and professional use.
Does Karui also convert AVIF and HEIF?
Yes. Karui converts HEIC, HEIF, AVIF, PNG, WebP, and BMP to optimized JPEG.
It also compresses PDF files. One app for all your format conversion needs.
