Does the keyboard type right to left?

Yes. The Persian layout sets right-to-left direction while inserting ordinary Unicode characters.

What does the ZWNJ key do?

It inserts U+200C, the zero-width non-joiner used to keep letters apart without adding a visible space.

Persian Keyboard

Opens the multilingual keyboard on its Persian layout with right-to-left text direction, Persian ی and ک, digits and a ZWNJ key.

Right to left, with Persian ی and ک rather than their Arabic lookalikes, the Persian digits, and a zero-width non-joiner key.

Your text0 / 100,000 characters

Zhe, the Persian digits and the zero-width non-joiner

Click a key, or type in the box with your own keyboard.

Language

Characters

0 / 100,000

Click a key and the character lands where the cursor is, so you can click, type, click again and it stays in order. Your own keyboard types into the box as usual: this page does not remap your keys, it gives you the characters they do not have. Shift stays on until you press it again, and Thai and Persian have no case, so the control is not offered there. Backspace here removes a character together with the marks sitting on it, and Undo puts back the last hundred steps, text and cursor together.

What comes out

привет, key by keyeach key lands at the caret, in order
привет
Greek καλημέραthe accented letter is one composed character
καλημέρα
Ukrainian українськаі, ї, є and ґ, not Russian substitutions
українська
Thai กา and ก่าthe tone mark keeps its own codepoint
กา ก่า
Persian متن‌فارسیthe zero-width non-joiner is kept
متن‌فارسی

Exact about characters: Every key inserts the character it shows, encoded as ordinary Unicode, at the cursor: this types text and does not translate or transliterate it. Greek accents are composed into single characters, Persian keeps the zero-width non-joiner, and deletion removes a character with its combining marks rather than leaving one behind. Nothing you type leaves the browser. Your draft and the language you picked are kept in this browser alone, and the Start over button at the top of the page forgets them. Sub-pages open in their own script without changing the language you chose here.

Common questions

Does the keyboard type right to left?: Yes. The Persian layout sets right-to-left direction while inserting ordinary Unicode characters.
What does the ZWNJ key do?: It inserts U+200C, the zero-width non-joiner used to keep letters apart without adding a visible space.

Every key inserts the character it shows, encoded as ordinary Unicode, at the cursor: this types text and does not translate or transliterate it. Greek accents are composed into single characters, Persian keeps the zero-width non-joiner, and deletion removes a character with its combining marks rather than leaving one behind. Nothing you type leaves the browser.