Free Image Converter

The Three Formats Explained

Almost every image on the web is one of three formats: JPG, PNG, or WebP. Each is built for a different kind of image. JPG is a photo-format optimised to throw away detail your eye does not catch. PNG is a graphics-format that preserves every pixel exactly and supports transparency. WebP is the modern hybrid: it does both lossy and lossless, supports transparency, and is usually smaller than either of the older formats at matched quality.

A converter is genuinely re-encoding the image. The pixels are decoded from the source format into a raw bitmap, then re-encoded into the target format. The file extension is not just renamed; the bytes are different. That matters because every lossy re-encode adds a small amount of generational quality loss. The rule is to convert once and keep the result rather than round-trip the same image through JPG twice.

Common Conversions and When to Use Them

Conversion is rarely useful on its own. It is usually the first step in a workflow: convert to a better-suited format, then compress, or hand off to a downstream tool. Here are the six directions worth knowing.

JPG → WebP

A modern web stack. WebP is usually 25 to 35 percent smaller than JPG at matched visual quality, and every browser shipped since 2020 supports it. The most common conversion for site owners chasing Core Web Vitals.

PNG → JPG

For photos that were accidentally exported as PNG. The file shrinks 60 to 80 percent and the visual loss is invisible at normal viewing sizes. Do not use for graphics or screenshots; PNG is the right home for those.

PNG → WebP

Preserves transparency, roughly halves the file size, and stays lossless if you ask for it. The cleanest path for graphics and logos that need to ship to a modern audience.

WebP → JPG

For legacy targets that still do not handle WebP cleanly. Examples include some older email clients, certain embedded slide-deck importers, and a long tail of kiosk and point-of-sale systems.

WebP → PNG

For software that does not accept WebP as an input yet. Many older photo editors and a few print-prep workflows are in this bucket. Lossless to lossless, so no quality is lost in the trip.

JPG → PNG

Only useful when the next step requires lossless re-editing. For storage or shipping over the wire, this is the wrong direction; the file will get larger and the content will not get any better.

Browser Support and Quality Tradeoffs in 2026

WebP is safe everywhere a normal browser is running. Safari shipped full WebP support in 2020, every Chromium browser supports it, and Firefox has shipped it since 2019. If your audience is on the open web through any modern browser, you can serve WebP and not worry about a fallback.

The places to still pin a JPG or PNG: some email clients (Outlook desktop in particular is unpredictable), a few embedded WebView layers in older mobile apps, scientific and print workflows that standardise on TIFF or PNG, and any place a human is going to edit the file in software bought before 2018. When in doubt, JPG for photos and PNG for graphics will still display anywhere.

After converting, you can usually shrink the result further with our image compressor. If you converted to PNG specifically because you need transparency, the background remover is the tool for getting that transparency in the first place. For the narrower case of turning an arbitrary image into a full icon pack, the favicon generator is purpose-built for that pipeline.