BLYNK
BLYNK.IO       📲 GETTING STARTED       📗 DOCS       ❓HELP CENTER       👉 SKETCH BUILDER

How To control blynk from browser/PC

can control LED ON/OFF blynk from browser/PC

Here is HTTP API doc - http://docs.blynkapi.apiary.io/# you’ll need REST plugin for bowser to do that.