You just took a bunch of photos on your iPhone and now you need to send them to someone on Windows, upload them to a website, or attach them to a work email. But every time you try, you get an error or the photos just show up as blank squares. The reason is almost always the same: your iPhone saved those photos as HEIC files, and HEIC is not supported everywhere.
This guide explains exactly what HEIC is, why it causes problems, how to convert HEIC to JPG, PNG, or PDF for free without installing any software, and which output format to choose depending on what you need to do with the photo.
What Is a HEIC File and Where Does It Come From?
HEIC stands for High Efficiency Image Container. Apple introduced it as the default camera format for iPhones and iPads starting with iOS 11 in 2017. Before that, iPhones saved photos as JPG just like every other camera. The switch to HEIC was driven by one main factor: storage space.
A HEIC photo takes up roughly half the storage space of an equivalent JPG photo while preserving the same level of visible detail. For a phone with 64 GB of storage, that difference is huge. It means you can store about twice as many photos before running out of space. Apple achieved this by switching from the old JPEG compression algorithm to the newer HEIF (High Efficiency Image Format) standard developed by the Moving Picture Experts Group, the same organization behind MP3 and MP4.
HEIC files can also store more than just a single photo. Live Photos on iPhone, where the camera records a short video clip alongside the still image, are stored in HEIC containers. Burst photos and depth maps for portrait mode can also be embedded in the same file. This versatility is another reason Apple chose the format.
The problem is that HEIC is an Apple-centric format. The rest of the technology world never adopted it as a universal standard the way JPG has been for over 30 years.
Why HEIC Causes Compatibility Problems
JPG works everywhere. Every web browser, every operating system, every photo editor, every social media platform, and every printer has supported JPG since the early 1990s. HEIC does not have that kind of universal support.
Partial means the platform may display HEIC files in some situations but not reliably across all devices and operating systems.
On Windows, opening a HEIC file without additional software simply does not work. You either get an error message or the Photos app asks you to install the HEVC Video Extensions from the Microsoft Store. In some regions that extension costs money. For someone who just received a photo from an iPhone user, this is a frustrating experience.
Web browsers including Chrome, Firefox, and Edge cannot display HEIC images inline. If you try to open a HEIC file in your browser, it will prompt you to download it rather than showing you the photo. This means HEIC files cannot be used on websites, in web-based email clients viewed in a browser, or in any web application.
Social media platforms reject HEIC uploads. Instagram, Facebook, Twitter, LinkedIn, Pinterest, and most other platforms require you to upload photos as JPG or PNG. If you try to upload a HEIC file, you will usually get an error or the upload will simply fail without a clear explanation.
How to Convert HEIC to JPG, PNG or PDF Without Installing Software
The fastest way to convert HEIC files without installing anything is to use the free HEIC Converter on OnlineToolsPlus. The entire conversion runs in your browser using JavaScript, so no file ever gets sent to a server. Your photos stay completely private on your device.
Drop HEIC files here or click to browse
Supports .heic and .heif. Multiple files allowed.The whole process takes about 10 to 30 seconds depending on the file size and the speed of your device. For most iPhone photos, which are typically 2 to 5 MB each, the conversion is nearly instant in a modern browser.
JPG, PNG or PDF: Which Format Should You Choose?
The right format depends entirely on what you are going to do with the converted photo. Each format has clear strengths and clear trade-offs.
| Format | File Size | Quality | Best For |
|---|---|---|---|
| JPG | Smallest | Excellent at 85%+ | Sharing, social media, websites, email |
| PNG | Medium | Lossless, perfect | Editing, text in image, sharp graphics |
| Largest | Lossless | Documents, printing, professional use |
When to choose JPG
JPG is the right choice for the vast majority of situations. If you want to send a photo by email, post it on Instagram, upload it to a website, share it in a WhatsApp chat with someone on Android, or attach it to a Google Doc, JPG is what you need. It produces the smallest file size while keeping the visual quality high enough that most people would never notice any difference from the original HEIC photo.
When you convert HEIC to JPG using this tool, a quality slider lets you control the trade-off between file size and sharpness. The default setting of 85 percent is a good starting point for almost any use case. At 85 percent, a typical 4 MB iPhone HEIC photo converts to a JPG that is around 1 to 1.5 MB, with no visible difference in quality when viewed on a screen.
When to choose PNG
PNG is the right choice when you need a completely lossless copy of the image. Unlike JPG, PNG does not discard any image data during compression. Every single pixel in the output is identical to what was in the HEIC original. This matters in specific situations: if you plan to open the photo in Photoshop or another editor and make changes, starting from a PNG preserves the maximum amount of information to work with. If the photo contains readable text, screenshots, or sharp geometric shapes, PNG keeps those elements crisp where JPG might introduce slight blurring or color noise around edges.
The trade-off is file size. A PNG converted from a HEIC photo will typically be 3 to 5 times larger than an equivalent JPG. For sharing by email or posting online, that extra size is rarely worth it. For archiving or editing, it is.
When to choose PDF
PDF is the right choice when you need to attach a photo to a formal document, send it to a printer, or share it in a professional context where PDF is the standard file format. Each HEIC file you convert becomes a single-page PDF with the photo filling the entire page at its original dimensions. PDF is universally accepted by printers, office software like Microsoft Word, email clients, and document management systems in a way that even JPG is not in some professional environments.
How to Convert HEIC on iPhone Directly
You do not need a computer to use the HEIC converter. The tool works in Safari on iPhone and iPad. Open the HEIC Converter in Safari, tap the upload area, and select photos from your Camera Roll. The conversion runs in your mobile browser, and the converted files save to your Downloads folder in the Files app. From there you can share them, attach them to messages, or upload them to any app.
If you want to stop your iPhone from creating HEIC files in the first place, you can change the camera format setting. Go to Settings on your iPhone, then tap Camera, then tap Formats. You will see two options: High Efficiency and Most Compatible. Selecting Most Compatible switches your camera to JPG for all future photos. The downside is that each photo will take up about twice as much storage space, so it is worth thinking about before making the change permanently.
Other Ways to Convert HEIC Files
The online tool is the fastest option for most people, but there are a few other methods worth knowing about depending on your situation.
On a Mac, you can convert HEIC to JPG directly in the Preview app. Open the HEIC file in Preview, go to File, then Export, and choose JPG from the format dropdown. You can also use the built-in Photos app on Mac: right-click any HEIC photo, choose Export, and select Export 1 Photo or Export Unmodified Original. When exporting normally, macOS automatically converts to JPG.
On Windows with the HEVC codec installed, you can open HEIC files in the Photos app and use Save As to export them as JPG. Without the codec, third-party software like iMazing or CopyTrans HEIC for Windows can handle the conversion, but both require a download and installation step.
If you use Google Photos, it automatically converts HEIC uploads to a format viewable in any browser and allows you to download them as JPG. The limitation is that you need a Google account and the photos need to be uploaded first, which takes time and uses data.
For bulk conversion of large photo libraries, desktop software like Adobe Lightroom or free tools like ImageMagick for advanced users offer batch conversion with more control. But for most people converting individual photos or small batches, the online tool is the simplest and fastest path.
Ready to convert your iPhone photos? The tool works in any browser, requires no account, and your files never leave your device.
⚡ Open HEIC Converter FreePrivacy: Do Your Photos Get Uploaded?
This is a question a lot of people have, and it is a completely reasonable one when dealing with personal photos. The HEIC Converter on OnlineToolsPlus processes everything locally in your browser. When you select a HEIC file and click Convert, the file is read from your device memory using the browser's built-in File API. The conversion is performed by JavaScript running entirely on your device. The resulting JPG, PNG, or PDF file is generated in your browser memory and downloaded directly to your device. No data is transmitted to any server at any point in this process.
You can verify this yourself by disconnecting from the internet after the page loads. The tool will continue to work normally, because all the processing happens client-side and requires no network connection once the page has loaded.
Frequently Asked Questions
Does converting HEIC to JPG reduce the image quality?
At the default quality setting of 85 percent, the converted JPG is visually indistinguishable from the original HEIC photo for almost all subjects and viewing conditions. You would need to zoom in to 300 percent or more and compare side by side in a professional editing application to see any difference. For photos that will be viewed on screens, shared online, or printed at standard sizes, 85 percent quality is more than sufficient. If you want absolute zero quality loss, convert to PNG instead.
Why does my iPhone save photos as HEIC instead of JPG?
Apple switched iPhones to HEIC by default to save storage space. A HEIC photo is about half the file size of an equivalent JPG. You can switch back to JPG by going to Settings, then Camera, then Formats, and selecting Most Compatible. This saves all future photos as JPG, but each photo will take up twice as much storage.
Is HEIC the same as HEIF?
HEIF is the name of the compression standard. HEIC is the name of the file container that Apple uses to store HEIF images. In everyday conversation the terms are used interchangeably. Both .heic and .heif file extensions are supported by the converter.
Can I convert multiple HEIC files at once?
Yes. Select multiple files in the file picker or drag and drop a group of HEIC files into the upload area. Each file is converted individually and all results appear in a list. You can download them one at a time or click Download All to save them together.