Image Converter
Convert between JPG, PNG, WebP and AVIF, and open HEIC photos from an iPhone.
Your files never leave your device — processing happens in your browser.
Drop an image here
or paste from your clipboard. Your file is processed on this device and is never uploaded.
Choosing an output format
Most conversions come down to one of two goals: making a file open somewhere it currently will not, or making it smaller. The format you should pick differs depending on which.
If you need it to open anywhere
JPG, without hesitation. It is the most universally supported image format in existence, and nothing you send it to will refuse it. It cannot store transparency and it is lossy, so keep your original if the image matters.
PNG if the image has transparency, or contains text or sharp-edged graphics. PNG is lossless, so nothing is degraded — but it compresses photographs badly and the files get large.
If you need it smaller
WebP is the pragmatic modern choice: typically 25–35% smaller than JPG at the same visual quality, supports transparency, and works in every current browser.
AVIF goes smaller still, sometimes substantially, at the cost of slower encoding and patchier support outside browsers.
Formats this tool reads but does not write
HEIC, GIF and BMP can be opened here but not produced. HEIC because it is Apple’s format and converting to it would recreate the compatibility problem people come here to solve. GIF because converting an animation to a single still frame is almost never what anyone wants. BMP because it is uncompressed and enormous, and there is no good reason to create one.
What conversion cannot do
Converting a lossy image to a lossless format does not recover quality that was already lost. A JPG saved at low quality and then converted to PNG is the same damaged image in a much larger file — the artefacts are now stored perfectly. If you want a better version, you need a better original.
Questions
Are my images uploaded to a server?
No. The conversion runs in your browser on your own device. You can verify it by opening developer tools, switching to the Network tab, and converting a file — nothing carrying your image is sent. Once the page has loaded you can even disconnect from the internet and it still works.
Why can’t I open HEIC files on Windows?
HEIC is the format iPhones save photos in by default, and Windows does not include a decoder for it without an additional codec from the Microsoft Store. Converting to JPG or PNG makes the photo openable everywhere, which is the most common reason people convert HEIC.
Is there a limit on file size or how many files I can convert?
There is no limit imposed by this site, no daily cap and no account. The only real limit is your device’s memory — a decoded image needs about width × height × 4 bytes, so a very large photo can exhaust a phone. When that happens the tool explains it in those terms.
Will there be a watermark on the result?
No. The output is your image in the format you chose, with nothing added. Watermarking a free result to sell its removal is one of the practices this site exists to avoid.
What happens to transparency when I convert to JPG?
JPG has no transparency, so transparent areas are filled with white — which is what most image viewers show behind transparency anyway. If you need to keep transparency, convert to PNG or WebP instead; both support it.
Why is converting to AVIF slower than the other formats?
No browser can write AVIF on its own, so the first time you choose it the site downloads a WebAssembly encoder, and AVIF encoding is genuinely more computationally expensive than JPG or WebP. The download happens once per device and is cached; the encoding cost is per image, and it buys you a noticeably smaller file.