Unicode & ASCII Playground

Type a character, a code point, or a number — everything converts live. Built for AP CS P
🧠 Encoding demo • UTF‑8 focus
(uses first Unicode character entered)

Unicode Block

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In ASCII?

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UTF‑8 Bytes

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HTML Entity

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Tip: ASCII is 7‑bit (0–127). Anything higher is Unicode-only. UTF‑8 stores Unicode in 1–4 bytes.

What’s happening under the hood?

  1. Unicode assigns each character a unique number called a code point (e.g., 😀 is U+1F600).
  2. UTF‑8 encodes that number as 1–4 bytes so computers can store/transmit it.
  3. ASCII is just the first 128 code points (U+0000–U+007F). If your character is ≥128, it isn’t ASCII.