Image Converter Online — JPG, PNG, WEBP, Free

Convert JPG, PNG, WEBP, and iPhone photos in your browser

This is a free online image converter that changes a picture from one format to another — JPG to PNG, PNG to WebP, WebP to JPG, PNG to JPG, or JPG/PNG to WebP — and it also reads AVIF, GIF, and HEIC/HEIF files that many apps refuse to open. Drop a file in, pick the output format, and download. There is no upload, no signup, and no watermark: every conversion runs locally in your browser with the Canvas API, so the image never leaves your device. It is 100% private by design.

Convert one file in Single mode, or switch to Batch to convert a whole folder — a camera roll of iPhone photos, a directory of screenshots — into a single format and download them together as a ZIP. Once converted you can resize your images to exact dimensions or compress them to shrink the file further.

JPG vs PNG vs WEBP vs AVIF: which format to pick

The “right” format depends on what is in the image and where it will be shown — a photo, a screenshot, and a logo each have a different best answer. This converter outputs JPG, PNG, or WEBP; AVIF, GIF, and HEIC are read as inputs and turned into one of those three.

JPG wins for photographs and for universal compatibility — every device, printer, gallery, old CMS, and social platform opens it, which also makes it the safe choice for embedding in Word documents, PDFs, or slide decks. PNG wins when you need a transparent background for a logo, icon, or UI asset, or crisp text and sharp edges in a screenshot, and you would rather keep a larger lossless file than risk any blur. WebP wins on the web: at similar quality it is typically 25–35% smaller than JPG or PNG and still supports transparency, which is why converting JPG or PNG to WebP speeds up a Shopify or WooCommerce storefront, a blog, or any page where load time matters. AVIF often beats WebP on size but is newer, so convert it to JPG, PNG, or WebP here whenever an app or older device cannot open it.

Converting is not the same as compressing

This tool changes the format — the container and the encoding — not the pixel dimensions. The output keeps the original width and height, there is no resize step, and there is no quality slider: JPG and WebP are re-encoded at a fixed high quality (about 92%), and PNG is always lossless. Because of that, a format change can make a file smaller or larger depending on the direction you convert.

Convert a 2 MB PNG screenshot to JPG and it often drops to a few hundred KB, because JPG discards detail your eye rarely misses. Go the other way — a photographic JPG saved as PNG — and the file usually balloons, sometimes several times larger, since PNG stores every pixel losslessly. Converting an iPhone HEIC to JPG almost always produces a bigger file too: HEIC compresses more efficiently than JPG, so you are trading size for compatibility.

So pick the tool for the goal: to make a smaller file in the same format, use the image compressor; to change the pixel dimensions, use the image resizer; to change the format, you are already in the right place.

How the conversion works, and its honest limits

When you convert, the image is decoded, drawn onto an HTML <canvas> at its native resolution with high-quality smoothing, and re-saved in the format you chose with canvas.toDataURL() (or toBlob() in batch mode). That whole pipeline runs client-side, which is what makes it free, instant, and private — but the canvas approach has a few honest edges worth knowing:

• JPG cannot hold transparency. Convert a PNG or WebP that has a transparent background to JPG and the empty area is filled with white before encoding. Keep PNG or WebP if you need the transparency.
• Animated GIFs become a single still. The canvas captures one frame, so a converted GIF turns into a static JPG, PNG, or WebP — the animation is not preserved.
• HEIC and AVIF depend on decoding. HEIC/HEIF iPhone photos are decoded first by a small library that loads only when you drop one in; AVIF relies on your browser's built-in support (current Chrome, Edge, Firefox, and Safari all read it, a very old browser may not). There is also a dedicated HEIC to JPG converter for iPhone photos with format tips.
• Dimensions never change. The output matches the source width and height exactly — this is a format converter, not a resizer.

How it compares to other ways to convert images

A browser converter is the quickest route for everyday JPG, PNG, and WebP changes with nothing installed. It is honestly not the only option, and for some jobs another tool fits better. The trade-offs:

For most everyday conversions the browser route is fastest and keeps your files on your own machine. Reach for a desktop editor when you also need to retouch the image, or the command line when you are batching thousands of files through a pipeline. If you only need JPG, PNG, or WebP out, pasting a file here beats all of them on convenience.

Common conversion mistakes — and the fix

A transparent logo came out with a white box

You converted to JPG, which has no alpha channel, so the transparent area is flattened to white. Convert to PNG or WebP instead — both keep transparency.

The file got bigger, not smaller

Converting a photo to PNG, or an iPhone HEIC to JPG, usually increases size — that is expected. To reduce the file, run it through the image compressor rather than switching formats.

My animated GIF became a single frame

The converter outputs static images, so only one frame of an animation is captured. Keep the original GIF if you need the movement.

A WebP or AVIF still will not open somewhere

The destination app or device is likely too old for that format. Convert to JPG or PNG, which every viewer, editor, and uploader accepts.

I expected the image to be smaller in pixels

Conversion never resizes — the output keeps the original width and height. Use the image resizer to change the dimensions.

Frequently asked questions