If you have an iPhone, your photos are saved as HEIC files by default. When you convert them, the two most common output formats are PNG and JPG. The short answer: convert to JPG when you want a small file that opens anywhere, and convert to PNG when you plan to edit the image further or need transparency. This post explains the trade-offs so you can pick the right format for each situation.
What Makes JPG and PNG Different
JPG uses lossy compression. That means it throws away some image data to make the file much smaller. A JPG photo will open on practically any device, email client, or website without a problem. The trade off is that every time you save a JPG, you lose a little more quality.
PNG is lossless. It keeps every single pixel from the original HEIC file. If you save a photo as PNG, then edit it and save again, you lose nothing. The cost is file size: a photo saved as PNG is several times larger than the same photo as JPG.
Both formats are widely supported, but they serve different purposes. Here is a quick comparison:
- JPG, lossy, small files, universal compatibility.
- PNG, lossless, large files, supports transparency.
When to Convert HEIC to JPG
JPG is the default choice for photos you are going to share, email, or upload. Because the files are small, they upload quickly and don’t fill up storage on the receiving end. Social media platforms, messaging apps, and web forms all expect JPG as a standard image format.
If you are taking a snapshot of a receipt, a quick travel photo, or anything you will view once and maybe share, JPG is the right pick. The lossy compression is barely noticeable in everyday use, and the convenience of a small file that opens everywhere is hard to beat.
You can use a free HEIC converter to turn your iPhone HEIC photos into JPG in seconds. No need to install software or sign up for anything.
When to Convert HEIC to PNG
PNG makes sense when you need to preserve every detail. This happens most often in two scenarios:
- You will edit the image further. If you plan to crop, adjust colors, or composite multiple photos, start with a lossless PNG. Every edit on a JPG adds more compression artifacts. PNG keeps the original data intact, so you can save and re save without degradation.
- You need transparency. PNG supports an alpha channel, meaning parts of the image can be transparent. JPG does not. If you are creating a logo, a graphic overlay, or any image that will sit on top of another background, PNG is your only choice among these two.
Keep in mind the file size trade off. A photo saved as PNG will be several times larger than the same photo as JPG. For a single image that you are actively editing, that is fine. For a whole album of vacation photos, PNG will eat up storage fast.
What About HEIC Itself?
HEIC is the iPhone’s default photo format. It uses modern compression to produce high quality images at smaller file sizes than older formats. The catch is that HEIC is not universally supported. Many Windows computers, older Android phones, and some web services cannot open HEIC files without extra software or plugins.
That is why you convert. For long term archiving on a Mac or iPhone, HEIC works fine. But if you want to send a photo to someone who uses a PC, or upload it to a website that doesn’t support HEIC, you need to convert to either JPG or PNG.
Comparing File Sizes (In Words)
To give you a sense of the difference: a typical HEIC photo from an iPhone might be around a few megabytes. The same photo converted to JPG will be smaller, often by a noticeable amount. Converted to PNG, it will be several times larger than the JPG version. The exact numbers depend on the image content, but the pattern holds: JPG wins on size, PNG wins on fidelity.
A Practical Decision Flow
If you are standing in front of a HEIC file and not sure which format to pick, run through these questions:
- Am I going to edit this photo further? If yes → PNG. If no → keep reading.
- Does this image need transparency (like a logo or sticker)? If yes → PNG. If no → keep reading.
- Am I sending this to someone or uploading it to a website? If yes → JPG. If no → PNG (or keep as HEIC).
That simple checklist will cover most situations. For the occasional image that falls in between, maybe you want to edit it later but also need to share it now, convert to JPG for sharing and keep the original HEIC as a backup. That way you get small files for quick sharing and a lossless original for later editing.
One Tool That Handles Both
You do not need to install software to convert HEIC to either JPG or PNG. Online converters work from any browser and handle the job in a few seconds. If you need a reliable option, heic.now is a free online HEIC converter that needs no sign up. It converts iPhone HEIC photos to JPG, PNG, PDF, WebP, AVIF, GIF and TIFF, and it also converts JPG, PNG and WebP back to HEIC. It even has an image info/EXIF viewer and a HEIC compression feature. Whether you need JPG for sharing or PNG for editing, it handles both in a couple of clicks.