Image converter
JPG, PNG and WebP, converted on your own computer. Your images are never uploaded to anybody’s server — including mine.
Your images
Pick as many as you like. Everything happens on this page.
Converted
How to use this image converter
- Choose your output format.
- Choose your images, then set the quality and longest side.
- Download your converted images.
Who it is for
For site owners moving images to WebP, and anyone who needs a quick format change without uploading private files.
Which format, and when
| Format | Best for | Transparency | Typical size |
|---|---|---|---|
| WebP | Almost everything on a website | Yes | 25–35% smaller than JPG |
| JPG | Photographs, email, anywhere old | No | The baseline |
| PNG | Logos, screenshots, sharp edges | Yes | Much larger for photos |
The short version: use WebP on your website. Every browser people actually use has supported it for years, and it is the single easiest way to cut page weight without touching the design.
The PNG mistake
PNG is lossless — it keeps every pixel exactly. That is perfect for a logo with hard edges and terrible for a photograph, where it can produce a file five or ten times bigger than the JPG.
If you have photos saved as PNG on your site, converting them is usually the biggest single speed win available to you.
What quality to use
Somewhere between 75 and 85 is the sweet spot for photographs. Above 90 you are adding file size that nobody can see. Below 70 you start to notice mushy detail, especially around text and sharp edges.
Screenshots and images containing text are the exception — they show compression damage much earlier, so either keep the quality high or use PNG.
Nothing here is uploaded
The conversion happens in your browser using a canvas. Your files never leave the machine, there is no queue, no size limit imposed by a server, and no copy sitting on somebody else’s disk afterwards. You can turn off your internet connection after the page loads and it still works.
That is also the one limitation: very large batches depend on your own computer’s memory rather than a server farm.
Common questions
How do I convert PNG to WebP?
Choose WebP as the output, add your PNG images and download them. WebP is usually much smaller than PNG and keeps transparency.
Are my images uploaded anywhere?
No. Everything runs in your browser. Nothing is transmitted, stored or logged, and the tool keeps working with the internet disconnected.
Why did my PNG get bigger?
PNG keeps every pixel exactly, so photographs become very large. Use WebP or JPG for photos and save PNG for logos, screenshots and anything needing transparency.
Does converting lose quality?
Converting to JPG or WebP compresses the image, so yes, a little. Converting to PNG does not. Going from JPG to JPG twice compresses twice, so always convert from your original.
Can it handle HEIC photos from an iPhone?
Only in Safari, which can decode HEIC natively. Other browsers cannot, so the file will not load. Export as JPG from your phone first.
Why does Download all save them one by one?
Bundling into a zip would need an external library. Saving individually keeps the page small and dependency-free. Your browser may ask permission for multiple downloads once.
Need more customers as well?
This tool is free and always will be. If you also want ads, search and follow-up that bring in customers, I offer a free 45-minute consultation for businesses in the USA, UK, UAE, Australia and India.
Book a free consultationBuilt and maintained by Premkumar Ragav, an independent performance marketing specialist. Updated November 2026.