Image Format Converter - PNG, JPG & WebP, No Upload

How the conversion works

The browser decodes your file, draws it onto a canvas at full resolution, and re-encodes the pixels in the format you pick. Anything the browser can display can be converted: PNG, JPEG, WebP, GIF, BMP, ICO, SVG, and AVIF in current browsers. Output is PNG, JPEG, or WebP, the three formats every browser can encode.

Because everything happens on your device, private images such as ID scans, medical documents, or unreleased designs never touch a server. It also means there is no upload wait and no file size cap beyond your device's memory.

Choosing the right format

JPEG is the universal photo format. It is lossy, it has no transparency, and it is accepted by virtually every app, printer, and upload form made in the last 30 years. Use it when compatibility beats everything else.

PNG is lossless. Every pixel is preserved exactly, and it supports full transparency. That makes it right for screenshots, logos, diagrams, and anything with sharp text. It is the wrong choice for photos, where files balloon.

WebP, developed by Google, does both jobs: lossy or lossless compression, with transparency. Google's compression study measured lossy WebP files 25 to 34% smaller than JPEG at equal quality. All current browsers display it, which makes it the best default for images on your own website.

Worked example: three everyday conversions

WebP to JPG: you saved a product photo from a website and your photo editor or a job portal refuses the .webp file. Choose it, pick JPEG, keep quality at 90, and download. A 180 KB WebP typically becomes a JPEG of roughly 200 to 300 KB, slightly bigger because JPEG is less efficient, but now it opens everywhere.

PNG screenshot to JPG: a 2.4 MB full-screen PNG screenshot converted to JPEG at quality 90 usually lands around 300 to 600 KB. Text stays readable at 90; go below 80 and letters start to blur.

Logo PNG with transparency to WebP: pick WebP and the transparent background survives, usually at a fraction of the PNG's size. Pick JPEG and the transparent area gets filled with the background color you choose, white by default.

Transparency and the black background problem

A canvas starts out fully transparent. JPEG cannot store transparency, so when a converter encodes those transparent pixels as JPEG, most browsers write them as black. That is why so many PNG-to-JPG converters give logos a black box behind them.

This converter paints a solid background before drawing the image whenever the output is JPEG. The default is white, which suits most documents and white web pages; the color picker lets you match any other background exactly.

What conversion cannot do

It cannot add detail that is not there. Converting a blurry, heavily compressed JPEG to PNG gives you a perfectly preserved copy of the blur, in a bigger file. Always convert from the highest-quality original you have.

It does not keep metadata. EXIF data such as camera settings, date taken, and GPS location is dropped during re-encoding. That is a privacy win when sharing online, but keep the original if you need the date information for a photo library.

Animated GIFs become a single still frame, because canvas captures one frame. And HEIC photos from iPhones only open in Safari; other browsers cannot decode them at all.

Common mistakes

Saving photos as PNG to "keep quality". A 12-megapixel photo as PNG can be 15 to 25 MB for no visible gain over a quality-90 JPEG.

Converting back and forth. JPEG to WebP to JPEG runs lossy compression twice. Convert once, from the original.

Renaming the file extension instead of converting. Changing photo.webp to photo.jpg does not change the data inside, and strict upload forms check the actual format. Convert properly, then upload.