The Ultimate Image Format Converter
How to safely decode Apple & Samsung HEIC files, flatten transparent PNGs, and upgrade to next-gen web formats without compromising your privacy.
Convert iPhone & Samsung HEIC to JPG Locally
If you take a photo on a modern Apple iPhone or an Android device like the Samsung Galaxy S25 Ultra, it is frequently saved as a .HEIC or .HEIF (High-Efficiency Image Container) file to save storage space. The problem? Windows PCs and almost all government, university, and job application portals completely reject HEIC files.
The Samsung "Ultra HDR" Bug
Many basic converters will crash or output a blank square when you upload a Samsung Galaxy HEIC photo. This is because Samsung uses "Ultra HDR" tone-mapping which confuses old decoding software. GASO Studio features an advanced WebAssembly decoder that natively unlinks HDR tone-maps, guaranteeing a flawless JPG conversion for both iOS and Android files.
Best of all, our engine mathematically reconstructs the image inside your browser, ensuring your private photos are never uploaded to a remote cloud server.
Flattening Transparent PNGs into JPGs
PNG files are highly popular because they allow for invisible, transparent backgrounds (perfect for logos and graphics). However, the standard JPG format physically does not support transparency.
If you try to convert a transparent PNG into a JPG, many basic converters will simply turn the invisible background into an ugly black box or a visual glitch. Our converter includes Transparency Flattening. You can choose whether the invisible areas of your PNG get painted clean white or solid black before it becomes a JPG, guaranteeing a professional export.
Next-Gen Web Formats: WEBP and AVIF
If you are a web developer or a blogger, standard JPGs are considered outdated technology. Next-generation formats like WEBP and AVIF offer the exact same visual quality as a JPG but take up 30% to 50% less file size. Use our converter to modernize your web assets, dramatically improve your website's load speeds, and boost your Google PageSpeed Insights score.
Frequently Asked Questions
Why do Samsung Galaxy HEIC files fail on other converters?
Modern Android devices like the Samsung Galaxy S25 Ultra shoot HEIC photos using 'Ultra HDR'. Most standard converters cannot read the HDR tone-map and crash. GASO Studio uses an advanced decoder that safely unlinks the tone-map, converting Samsung HEIC files flawlessly.
Is it safe to convert private photos online?
With traditional converters, no. But with GASO Studio, yes. Unlike other websites that upload your photos to remote servers, our converter uses WebAssembly to process your files entirely offline inside your browser's memory. Your data never leaves your device.
How do I convert HEIC to JPG on Windows?
Simply drag your iPhone or Android HEIC files into the GASO Studio converter. The built-in WebAssembly decoder will mathematically convert them to JPGs locally on your Windows PC for free.