HEIC Compressor Online Free — Compress or Convert iPhone Photos
Compress HEIC Without Uploading It Anywhere
HEIC is the format iPhones and iPads have saved photographs in since iOS 11. It is genuinely good — roughly half the size of JPEG at the same quality — which creates an unusual situation when you want to make one smaller.
Because HEIC is already efficient, there is less slack to recover. Re-compressing a HEIC as HEIC gains you less than you would expect. What actually reduces the file meaningfully is reducing the dimensions, or accepting a lower quality level than the phone chose.
The Question Behind Most HEIC Compression
People rarely want a smaller HEIC for its own sake. They want a file that will open and upload somewhere, and the size limit is what brought the format to their attention. If that is the situation, converting to JPEG at a target size solves both problems at once.
The reason is compatibility. Windows shows nothing for a .heic without an extra codec, Android support is patchy, and a great many upload forms accept JPEG and PNG only. A 900 KB JPEG that opens everywhere is more useful than a 400 KB HEIC that opens nowhere.
When to Keep HEIC
Keep it when the file is staying inside Apple's ecosystem — going into Photos, shared over AirDrop, or archived on a Mac. In those cases HEIC's efficiency is a real benefit and there is nothing to convert away from.
Why this runs on your own device
HEIC files come off a phone's camera roll, which makes them personal by default. ImageXpo decodes and re-encodes them with WebAssembly inside your browser, so the photograph is never transmitted, never stored on a server, and never leaves your computer.
Frequently asked questions
How do I compress a HEIC file?
Choose the HEIC and set a target size. If you also need the file to open outside Apple’s ecosystem, convert to JPEG at the same time — that is usually the real requirement behind wanting a smaller HEIC.
Should I compress HEIC or convert it to JPEG?
Convert, in most cases. HEIC is already efficient, so re-compressing it recovers less than you would hope, and the format is the reason the file will not open on Windows or Android. Keep HEIC only if the photo is staying on Apple devices.
Why is a JPEG larger than the HEIC it came from?
Because HEIC compresses better at the same quality — that is its purpose. A JPEG carrying the same visible image is typically 1.5 to 2 times the size. Setting a target size when you convert keeps that increase under control.
Is my photo uploaded to a server?
No. The HEIC is decoded and re-encoded through WebAssembly in your browser, so it never leaves your device and nothing is stored anywhere.