Semaphore Alphabet — Flag Signal Encoder
Convert text to flag semaphore positions. Each letter is displayed as a person holding two flags at specific angles. SVG visual output with full alphabet reference.
Semaphore Alphabet Reference
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Solid flag = left arm position. Light flag = right arm position. Based on international maritime semaphore.
How to Use the Semaphore Alphabet — Flag Signal Encoder
- Enter or paste your text in the input field.
- The encoded or decoded result appears automatically.
- Copy the output using the copy button.
- Switch between encode and decode modes if available.
Riferimento Rapido
| Da | A |
|---|---|
| A | 65 (ASCII) |
| Z | 90 (ASCII) |
| a | 97 (ASCII) |
| 0 | 48 (ASCII) |
| Space | 32 (ASCII) |
| @ | 64 (ASCII) |
Casi d'Uso
- •Encoding or decoding data for web development projects.
- •Learning about cryptography and different cipher techniques.
- •Preparing encoded content for APIs or data transmission.
- •Solving cipher puzzles, CTF challenges, or educational exercises.
Formula
In flag semaphore, each letter is encoded by the position of two flags held by a person. Flags can be in 8 positions (45° increments): up, upper-right, right, lower-right, down, lower-left, left, upper-left.
Domande Frequenti
What is flag semaphore?
Flag semaphore is a visual signaling system that uses flags held at different arm positions to represent letters and numbers. It was widely used by navies and armies before radio communication became standard.
How many flag positions are there?
Each arm can be in one of 8 positions spaced 45° apart, giving 7 usable combinations per arm (the 8th position — both arms pointing up — is not used for letters). Each letter uses a unique combination of left and right arm positions.
Is semaphore still used today?
Maritime flag semaphore is still an official part of international naval communication, though it is rarely used in practice. It remains a required skill for naval officers in some countries.
Can semaphore encode numbers?
Yes. Numbers in semaphore are preceded by a special 'numeric' signal, after which letters A–J represent digits 1–9 and 0. This tool focuses on the alphabetic encoding.
What is the difference between left and right flags?
In the display, the solid-colored flag represents the person's left arm and the lighter flag represents the right arm. Together they form the unique symbol for each letter.