DeepL is a machine-learning based online translator, similar to Google Translate and others: You enter text in the box on the left and it will output the text translated to another language in the box on the right. In my experience (mainly translating between English, German and/or French) it provides very, very impressive and definitely far better results than any other automated translator I have tested. The translation is almost always very understandable and often nearly flawless.
They also provide a (paid) API if you want to use DeepL translations in your own products.
Only downsides (and why it only gets four stars):
- It only supports relatively few European languages compared to Google Translate (English, German, French, Spanish, Italian, Dutch, Polish; in particular no Chinese or other Asian languages).
- It cannot translate whole webpages, you always need to copy-&-paste the specific text you want to translate.
- While it is the best automated translator on the market, it is still not as good as a human translator.