Type Bangla the Avro way, in the browser
This page uses the open Avro phonetic pattern table. Familiar spellings such as ami, bangla and bhalo behave the way Avro users expect. The output is Unicode — convert later with Unicode to Bijoy only if a press asked for SutonnyMJ.
A short test sentence
Type ami banglay gan gai. You should see আমি বাংলায় গান গাই. Harder clusters: ksh → ক্ষ, ng → ং or ঙ depending on position, .t / .d for retroflex ট/ড. If a letter will not appear, click it on the on-screen keyboard instead of guessing a new romanisation.
When this does not apply
This is not a desktop IME and not OmicronLab’s installer. A DTP operator who already types Bijoy at speed should stay on that layout — see Avro vs Bijoy. Do not paste this Unicode into a SutonnyMJ-only Word file without converting.