Comparisons
PNG or JPG, WEBP or PNG, MP4 or MKV, FLAC or MP3. The answer first, then the reasoning, then the specifications — and a converter to act on it.
Picking between two formats
Most of these questions have the same shape: one format is smaller, one opens in more places, and which matters depends entirely on where the file is going. A photograph headed for a website and a photograph headed for a print shop want opposite answers.
Each comparison below starts with the answer in one sentence, lists the situations where each format wins, and ends with the specifications side by side. Every one of them links straight into the converter, set up and ready.
Questions
Which image format is best for a website?
WEBP for almost everything: it is smaller than JPG for photographs and smaller than PNG for graphics, keeps transparency, and every current browser shows it. AVIF is smaller again but slower to encode. Keep a PNG or JPG only where something old has to open the file.
Which video format plays everywhere?
MP4 with H.264 video and AAC audio. It is the one combination that plays on every phone, laptop, TV and messaging app made in the last decade. MKV and WEBM are better at other things, but neither is guaranteed to open wherever the file ends up.
Is a lossless format always better?
Only if the file will be edited again or the difference is audible or visible where it is used. Lossless files are several times larger, and for sharing a photo or a song a good lossy format is indistinguishable at a fraction of the size.
Can I convert between the two formats after reading a comparison?
Yes. Every comparison links straight to the converter for both directions, already set up. The conversion runs in your browser, so nothing is uploaded and there is no size limit.