Every image format is a trade-off, and the best format depends entirely on what the image contains and where it's going. There is no universal winner — which is exactly why so many people end up with 12 MB PNGs on a website that would load twice as fast with a 400 KB WEBP. Understanding what each format optimizes for turns format choice from a guess into a decision.
The three formats in practice
- JPG (JPEG) — lossy, great for photos and anything with smooth gradients. Small files, no transparency. Almost everything with a camera produces JPGs, and it remains the safest format for sharing and printing.
- PNG — lossless, perfect for graphics with sharp edges: logos, screenshots, charts, UI mockups, and anything needing transparency. The cost is file size — a photo saved as PNG can be 5–10× the size of the same photo as JPG.
- WEBP — modern lossy (and lossless) format from Google with transparency support and dramatically smaller files than JPG at similar quality. Universally supported in browsers since 2020, so it's the default choice for web images.
- AVIF — newer still, with the best compression of the common formats, but heavier to encode and with spotty support in older tools. Best for large web image sets where every KB counts.
A worked comparison
Take a 4000 × 3000 photo from a phone camera, saved three ways: JPG at quality 82 lands around 1.5 MB; PNG is roughly 8–10 MB (and gains nothing for a photograph); WEBP at the same visual quality is typically 800 KB–1 MB. That's a 30–40% saving over JPG with no visible difference on screen — which is why web pages built on WEBP load measurably faster. The same photo, but with text and a logo overlaid (a banner, say), changes the math: PNG keeps the text edges crisp and gives you transparency, and the size penalty becomes worth paying.
The decision rule
Photos and gradients → JPG or WEBP. Graphics, text, screenshots, transparency → PNG or WEBP. Printing → JPG or PNG at high quality, never WEBP. If you're putting it on a website, WEBP wins almost every time; if you're emailing it to a client, JPG wins for compatibility.
One more thing to know: converting JPG to PNG never recovers quality — the detail was already discarded when the JPG was created. Converting formats is about choosing the right container for the job, not restoring lost pixels. If you need to edit, edit from the largest original you have.
Convert to the right format
ForgePlug's Image Converter handles JPG, PNG, WEBP, AVIF, and more with smart recommendations — and Image Compressor shows you the size you'll actually save. All in your browser.
Open Image ConverterWEBP's compatibility problem is basically solved
WEBP spent years as "the format that doesn't quite work everywhere," but that's largely history now — support became near-universal across current browsers once Safari added it, and current versions of most image and design software read and write it without issue. The remaining friction is narrower than people assume: specific older versions of certain office or design tools, not modern browsers, are where a WEBP file might still fail to open. For anything destined for the web, that old hesitation about WEBP compatibility is mostly outdated advice at this point.
None of these three formats handle animation the same way
JPG, PNG, and WEBP as discussed above are all being compared as static images, but animation is a separate axis entirely. GIF remains the most common animated format by habit, despite being limited to a 256-colour palette — which causes visible banding and dithering on anything with smooth colour gradients, like a photo or a gradient background. Animated WEBP supports full colour depth and typically produces dramatically smaller files than an equivalent GIF for the same animation, with no palette limitation. If you're choosing a format specifically for a moving image rather than a still one, that's a different decision from the static JPG/PNG/WEBP comparison above.