Different image formats make different trade-offs between file size, quality, and features like transparency. Converting to the right format for the job is often a bigger win than compression alone — a photograph stored as PNG can be five times larger than the same image as WebP.
How to use the Image Converter
- Upload the image you want to convert
- Pick the output format
- Adjust quality if you are converting to JPEG or WebP
- Download the converted file
Which format to choose
- WebP — the best default for the web. 25–35% smaller than JPEG at the same visual quality, and it supports transparency like PNG does.
- JPEG — universally supported, excellent for photographs, but no transparency.
- PNG — lossless with transparency. Ideal for logos, icons, screenshots and anything with sharp edges or text. Poor choice for photographs.
- BMP — uncompressed. Very large files; useful mainly for legacy software that accepts nothing else.
What you lose when converting
Converting to a lossy format (JPEG, WebP) re-encodes the image and discards some detail, even at high quality. Converting a lossy image to a lossless one (JPEG → PNG) does not restore the lost detail — it just stores the already-degraded image without further loss, usually at a much larger file size.
Converting to JPEG also flattens transparency: anything transparent becomes solid, since JPEG has no alpha channel. If your image has transparent areas, use WebP or PNG.
Frequently asked questions
Does converting PNG to JPEG reduce quality?
Yes, slightly — JPEG is lossy, so the re-encode discards some detail. For photographs the difference is invisible at 80% quality and the file is far smaller. For logos, screenshots or images with text, stay on PNG or WebP.
Will transparency survive the conversion?
Only if you convert to PNG or WebP. JPEG and BMP have no alpha channel, so transparent regions are filled in with a solid colour.
Is WebP safe to use now?
Yes. Every current browser supports it, including Safari since 2020. If you need to support genuinely ancient browsers, serve WebP with a JPEG fallback using the picture element.
Can I convert HEIC files from my iPhone?
Not currently — browsers cannot decode HEIC natively, so it cannot be read client-side. Set your iPhone to capture in 'Most Compatible' mode to get JPEGs directly, or convert on the device first.