Image Converter
Your image stays in your browser and is never uploaded. Location and camera data are stripped when editing. Maximum 10 MB and 25 megapixels.
To scale: same size as on the left · Fit: enlarged to the column · 1:1: one screen dot per image pixel
PNG is lossless — a quality setting has no effect on it.
What this tool does
Convert an image to another file format: PNG, JPEG, WebP or AVIF, in any direction. You pick the target format, see the result beside the original and download it when you are happy. For the lossy formats you can adjust quality separately; leave that slider alone and your browser picks its own default rather than a number we filled in for you. For PNG the slider disappears with a note, because PNG is lossless and ignores it anyway. Convert to JPEG and a transparent background gets a white backing — JPEG has no notion of transparency, and that is the only place this happens. The same tool also crops, resizes and rotates; whatever you don’t switch on is left alone. Everything happens locally in your browser: nothing is uploaded, logged or kept. Free and unlimited to use, including commercially.
What people use this for
- PNG → WebP (smaller file for the web)
- JPG → PNG (add transparency)
- WebP → JPEG (compatibility with older software)
- Set quality between 10% and 100% for WebP and JPEG
What others think of this tool
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Do you work with Westcube?
Leave a review on Google tooFrequently asked questions
Which file formats can I use as input?
Any image format your browser can natively open: PNG, JPG/JPEG, WebP, GIF, BMP, and — depending on your browser — often SVG and AVIF too. Pick a file with the file picker and the tool shows a preview right away; you don't need to specify the source format yourself.
Which output formats can I choose?
You can choose WebP, AVIF, PNG and JPEG. AVIF may be shown as unsupported when your browser cannot encode it. The selected format determines the download extension and encoding.
Is transparency preserved when converting?
Converting to WebP or PNG fully preserves transparency. JPEG doesn't support transparency: transparent areas are automatically filled with a white background before export when you pick JPEG, so you don't end up with an unexpected black area.
Why is the quality setting sometimes hidden?
The quality slider is off by default, with "unchanged" beside it. That is deliberate: if all you want is a different format, no quality value you did not choose should be applied on the way. Tick "adjust" and the slider becomes active. Pick PNG as the target and it is disabled with a short note: PNG is lossless and ignores the setting, and a slider that does nothing is more misleading than no slider at all.
Is my image uploaded or stored anywhere?
No. The whole process — reading the file, drawing it on a canvas, and exporting it to the chosen format — happens locally in your browser using JavaScript. Nothing is sent to any Westcube server (or anyone else's), nothing is logged, and nothing is retained. Close the tab and the file is gone unless you already downloaded it.
Can I convert and resize at the same time?
Yes. Switch the resize block on as well and both happen in one pass, without putting the image through two rounds of compression. That saves quality: every time a JPEG is written out again, the encoding shaves a little off. Cropping and rotating can come along in the same move.