Quick answer
An image converter rewrites a photo's file format without changing what the photo looks like. It can turn an iPhone's HEIC photo into a JPG, a PNG into a WebP, or almost any supported format into JPG, PNG, or WebP. Most conversions finish in a second or two. This tool runs entirely in your browser, so nothing is uploaded.
What Does an Image Converter Do?
An image converter rewrites a photo's file format without changing what the photo looks like. It can turn an iPhone's HEIC photo into a JPG, a PNG into a WebP, or almost any format into almost any other supported output. Most conversions finish in a second or two and involve little to no visible quality change. The photo's pixels stay the same; only the way they're packaged into a file changes.
Why Photos Won't Open in the First Place
Not every device understands every image format. iPhones save photos as HEIC by default because the file is roughly half the size of a JPG at the same quality, which saves storage space. The problem is that many Windows PCs, older email programs, and web upload forms were never built to read HEIC files. The photo shows up as a broken thumbnail or throws an "unsupported file type" error. Running the photo through an image converter fixes this instantly by rewriting it into a format the destination actually understands.
How to Convert a Photo (3 Steps)
- Upload your photo. Drag it in or pick it from your device. Bulk conversion is supported, so you can convert many photos at once.
- Pick your output format. JPG for the widest compatibility, PNG for transparency, or WebP for smaller web files.
- Download the result. One file, or a ZIP if you converted several at once.
That's the whole process. Most people are done in under a minute, even with a batch of photos.
JPG vs. PNG vs. WebP vs. HEIC vs. AVIF: Which One Do You Need?
- JPG — the safest default. Opens almost everywhere: email, uploads, printing, social media.
- PNG — best when you need a transparent background, like a logo or graphic with sharp edges. Files run larger than JPG.
- WebP — a newer web format. Smaller file sizes than JPG at similar quality, though a few older apps don't support it yet.
- HEIC — Apple's default photo format. Great for saving iPhone storage, but convert it before sending the photo anywhere outside Apple's ecosystem.
- AVIF — an even newer, smaller web format some sites are adopting. Still not as widely supported as JPG or PNG, so convert to JPG if you're unsure where the file is headed.
This tool also handles SVG vector graphics and BMP bitmaps as input. For PNG-to-SVG vectorization, use the PNG to SVG tool. RAW camera files (DNG, CR2, NEF, ARW) are not supported in the browser — convert those with desktop software first, then use this tool if you need another format.
Does Converting a Photo Lower Its Quality?
It depends which formats are involved. Converting between two formats that both use compression, like HEIC to JPG, causes a very slight quality change that's rarely visible. Converting to a lossless format like PNG keeps quality exactly the same but usually makes the file bigger. Using the right format for the content — PNG for graphics with hard edges, JPG for regular photos — generally looks better than forcing everything into a single format.
Is It Safe to Convert Photos Online?
There are two kinds of online converters. Server-based tools upload your photo to a company's servers, convert it there, and send back the result. Browser-based tools like this one run the entire conversion on your own device, so the file is never uploaded anywhere. For everyday photos either approach is generally fine, but if you're converting anything personal or sensitive, a browser-based image converter is the safer pick since there's nothing to store or leak later. Browser conversion also strips EXIF metadata (date taken, GPS, camera settings) from the output, which reduces hidden data when you share photos online.
Common Problems and Fixes
My iPhone photos won't open on my Windows computer
This is almost always a HEIC compatibility issue, not a damaged file. Convert it to JPG and it opens normally everywhere.
I want new photos to save as JPG automatically
On an iPhone, go to Settings, Camera, Formats, and choose "Most Compatible." This only affects photos taken after you switch it, so older photos still need converting.
The converted photo looks slightly different
This is expected between lossy formats. If exact quality matters, convert to a lossless format like PNG instead.
A converted file won't upload to a website or app
Some upload forms only accept specific formats, most often JPG or PNG. If a site rejects your file, check which formats it lists as accepted and convert to one of those before trying again.
Frequently Asked Questions
iPhones save photos as HEIC by default, and many Windows programs don't recognize that format. Converting to JPG fixes it instantly, since JPG opens almost everywhere.
There's a very slight difference, but it's not visible in everyday use like sharing, printing, or uploading photos.
Yes. Upload multiple files, choose one output format, and download everything together as a ZIP.
No. This image converter runs entirely in your browser, so your files are never sent to a server.
Go to Settings, Camera, Formats, and select "Most Compatible." New photos will save as JPG going forward, though existing photos still need converting.
JPG works almost everywhere and suits regular photos. PNG is best for transparency. WebP gives smaller files for websites but has slightly less universal support than JPG.
Ready to fix a photo that won't open? Upload it above and pick your format with this image converter — it only takes a few seconds.