CompleteToolkit

Image Format Converter

Convert images between JPG, PNG and WebP — instant, local, no upload queue.

About this tool

Every image format is a trade-off, and the format you have is regularly not the format you need. A form accepts only JPG; a logo needs PNG transparency; a website wants WebP for speed; a WebP screenshot won't open in older software. This converter moves images between the three formats that matter — JPG, PNG and WebP — instantly and locally, with no upload queue and no watermark.

The conversions handle the details correctly. Converting to JPEG — which doesn't support transparency — composites transparent regions onto white instead of leaving black artifacts, the classic bug of careless converters. Converting to PNG is fully lossless. Converting to WebP uses high-quality encoding that typically produces the smallest files of all three. Any browser-readable input works, including GIF and BMP.

Knowing which target to pick is half the job, so the short version: JPG for photographs going to forms, email and legacy systems; PNG for logos, screenshots, and anything needing transparency or perfectly sharp text; WebP for images destined for the web, where its smaller sizes directly improve page speed. When in doubt, convert and compare — it takes two seconds each, because nothing uploads.

How to use the Image Format Converter

  1. 1Choose any image — JPG, PNG, WebP, GIF or BMP.
  2. 2Pick the target format; conversion happens instantly.
  3. 3Check the resulting file size shown next to the download button.
  4. 4Download the converted file.

Frequently asked questions

What happens to transparency when converting to JPG?

JPEG doesn't support transparency, so transparent regions are composited onto a white background — the standard, correct behavior. To keep transparency, choose PNG or WebP as the target instead.

Which format gives the smallest file?

WebP, almost always — typically 25–35% smaller than an equivalent JPEG and far smaller than PNG for photos. Every modern browser supports it; only very old software might not open it.

Is converting JPG to PNG pointless?

It doesn't improve quality (JPEG's compression loss already happened), but it's often required — many systems demand PNG uploads, and PNG re-saves without further generational loss. It's a valid conversion; just don't expect the image to look better.

Can I convert HEIC photos from an iPhone?

Only if your browser can display HEIC (Safari can; most others can't yet). If the file picker accepts it and a preview appears, the conversion will work. Otherwise, export the photo as JPEG from your phone first.