Image Converter

How to use this image converter

1. Choose an image file.
2. Select the format you want to convert to.
3. Click "Download Converted Image" to save it.

Which formats are supported?

PNG (lossless, supports transparency), JPG (compressed, no transparency) and WebP (modern format, smaller file sizes) are all supported for both input and output, converted directly on your device.

What actually happens during format conversion

Converting between image formats in a browser works by fully decoding the source image into raw, uncompressed pixel data, then re-encoding that pixel data into the target format from scratch — there's no direct format-to-format translation happening, since JPEG, PNG, and WebP each store pixel data in completely different ways internally. This is why conversion is always a full round-trip through an intermediate uncompressed representation, and why converting between two lossless formats (PNG to WebP's lossless mode, for instance) can be genuinely lossless, while converting to or from a lossy format like JPG always involves the same kind of quality trade-off as compressing an image, regardless of which two formats are involved.

Why transparency doesn't survive a trip through JPG

PNG and WebP both support an alpha channel — a fourth piece of data per pixel controlling transparency — but JPEG's format specification has no concept of transparency at all, since it was designed decades ago specifically for photographs, which don't need it. When converting a transparent PNG or WebP to JPG, there's no transparency information for the JPG format to preserve, so every transparent pixel gets filled in with a solid color (white, by convention) before encoding. This is a one-way loss: once an image has been converted to JPG, the original transparency data is gone permanently, and converting that JPG back to PNG afterward won't restore it — the white background is now just part of the image.

WebP adoption — where it's still worth having a fallback

WebP has been supported by every major browser for several years now and, in most modern web contexts, is simply the better default choice — smaller files, transparency support, and both lossy and lossless modes in one format. The remaining gaps are mostly outside the browser: some older desktop image viewers and editing software, certain email clients, and a handful of legacy content management systems and PDF generators still don't handle WebP correctly, sometimes rendering a broken image icon instead. For anything destined for a modern website, WebP is usually fine outright; for a file that needs to work reliably in email, older software, or an unknown downstream tool, keeping a JPG or PNG version as a fallback is still the safer choice.

Converting back and forth doesn't undo quality loss

A common misconception is that re-saving a JPEG as a PNG "fixes" its quality, since PNG itself is lossless. It doesn't — PNG will faithfully preserve whatever pixel data the JPEG decoder handed it, blocky compression artifacts and all, just without losing any further detail from that point forward. The quality damage already happened during the original JPEG encoding and can't be reversed by switching formats afterward; it can only be avoided in the first place by keeping a high-quality or lossless master copy and generating compressed derivatives from that master, rather than repeatedly converting and re-compressing the same already-lossy file.

Limitations of this tool

This converter handles static PNG, JPG, and WebP images by decoding and re-encoding them through the browser's canvas API — it doesn't support animated formats like GIF or animated WebP/PNG, since converting an animation frame-by-frame through a canvas would only capture a single static frame, not the full sequence. It also doesn't guarantee preservation of embedded color profiles (ICC profiles) or metadata like camera EXIF data, both of which can be altered or dropped during the decode-and-re-encode process depending on the browser's own image handling — if exact color fidelity or metadata preservation is critical for your use case, a dedicated desktop image editor gives more control over what's kept.