Save an image and your software asks which format you want. Pick the wrong one and you end up with a blurry logo, a screenshot that weighs 5 MB, or a photo whose background turned into a black box. The three formats you will meet most often on the web are JPG, PNG and WebP. Each was designed for a different job, and once you know those jobs the choice becomes easy.
JPG (JPEG): the photo format
JPG has been around since 1992 and is still the most widely supported image format in the world. It uses lossy compression: it throws away fine detail that the human eye is not very good at noticing, especially subtle colour variation. That is why a 24-megapixel photo can be saved as a 3 MB JPG instead of a 70 MB raw file.
Use JPG for: photographs, realistic images with gradients, and anything that must open on every device and program.
Avoid JPG for: screenshots, text, logos and line art. Sharp edges create visible “halo” artefacts around letters and lines. JPG also cannot store transparency.
PNG: the pixel-perfect format
PNG uses lossless compression, meaning every pixel comes back exactly as it went in. It also supports transparency, including smooth semi-transparent edges. The price is size: a photograph saved as PNG is typically five to ten times larger than the same photo as a good JPG.
Use PNG for: screenshots, interface graphics, logos, diagrams, images containing text, and anything that needs a transparent background.
Avoid PNG for: photographs on websites — they will be needlessly heavy and slow pages down.
WebP: the modern all-rounder
WebP was introduced by Google and is now supported by all major browsers, including Chrome, Edge, Firefox and Safari. It can work in both lossy and lossless modes and supports transparency and even animation. In practice, lossy WebP files are commonly 25–35% smaller than JPGs of similar visual quality, and lossless WebP is usually smaller than PNG.
Use WebP for: almost any image on a website, especially photos and transparent graphics where file size matters.
Watch out for: older desktop software, some print services and certain upload forms that still expect JPG or PNG. If a site rejects your WebP, convert it with our image converter.
Side-by-side comparison
| JPG | PNG | WebP | |
|---|---|---|---|
| Compression | Lossy | Lossless | Lossy or lossless |
| Transparency | No | Yes | Yes |
| Typical photo size | Small | Very large | Smallest |
| Sharp text & lines | Poor | Excellent | Very good |
| Compatibility | Universal | Universal | All modern browsers |
| Best for | Photos everywhere | Screenshots, logos | Websites |
A simple decision guide
- Is it going on a website? Use WebP, ideally compressed with Compress Image.
- Does it need a transparent background? Use PNG (or WebP for the web).
- Is it a screenshot or contains small text? Use PNG.
- Is it a photo you are emailing, printing or uploading to an older system? Use JPG.
What about SVG, GIF and HEIC?
SVG is not made of pixels at all; it describes shapes mathematically, so logos and icons stay crisp at any size — ideal when you have the vector original. GIF is limited to 256 colours and best left for simple animations. HEIC is the efficient format iPhones use for photos; it is great on Apple devices but poorly supported elsewhere, so convert to JPG before sharing widely.
The bottom line
Choose the format by the content, not by habit: JPG for photos that must work everywhere, PNG for pixel-perfect graphics and transparency, and WebP when speed on the web matters. Whatever you start with, Wartatren.biz.id can convert, resize and compress it for free, right in your browser.
