HesapHanem

QWERTY Shift Cipher

Enter your text and a shift amount to encode or decode.

How it is calculated

The keyboard's three letter rows are treated as three separate circles: qwertyuiop (10 keys), asdfghjkl (9 keys) and zxcvbnm (7 keys). To encode, every letter moves shift places to the right inside its own row, and when it runs past the end it wraps to the start: new position = (position + shift) mod row length. To decode, the shift is applied in the opposite direction, so decoding with the same number restores the text. Entering a negative shift when encoding has the same effect as decoding.

Because the rows have different lengths, a shift of 10 returns the top row to where it started but still moves the other two. Upper and lower case are kept. Anything that is not one of the 26 basic letters (spaces, digits, punctuation, accented or Turkish characters such as ş or ğ) is passed through unchanged. A decimal shift is rounded to a whole number. The output also reports the character count and the shift used (shown negative when decoding). This is a puzzle cipher with few possible keys, not real security.

Worked example

Encode "Hello World" with a shift of 3. H sits in the middle row (a s d f g h j k l); 3 places on is l. E is in the top row (q w e r t y); 3 on is y. The first l is 9th in the middle row, so it wraps around to d, and o, 9th in the top row, wraps to w. The result is Lyddw Twudh, 11 chars, with the space kept. Decoding "Lyddw Twudh" with the same shift of 3 gives "Hello World" back.

Try this example →

Common mistakes

  • Choosing decode and also entering a negative shift. Decode already reverses the direction, so enter the original positive shift. Two reversals cancel out and you encode again.
  • Expecting a letter to move to another row. Each letter stays in its own row, so q can become p but never a.
  • Expecting digits, punctuation or accented letters to be changed. They are copied as they are, so text with ş or ğ is only partly encoded.
  • Assuming a shift of 26 (as in a Caesar cipher) returns the text. Row lengths are 10, 9 and 7, so a full cycle happens at different shifts for each row.
  • Using it for secrets. Few possible shifts and the fixed rows make it trivial to break.

About this calculator

This cipher works like a Caesar shift, but instead of moving letters along the standard alphabet, it moves them along the physical rows of a QWERTY keyboard — so “Q” might shift to “W”, “W” to “E”, and so on, wrapping back to the start of the row when it runs off the end. Each of the three letter rows (QWERTYUIOP, ASDFGHJKL, ZXCVBNM) is treated as its own closed loop.

It's a lightweight, keyboard-aware twist on classic substitution ciphers, popular in puzzle hunts, coding challenges, and cryptography classroom exercises as an easy way to introduce shift-cipher logic using something more visual and tactile than the alphabet — you can literally see the shift happening across your own keyboard.

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Comments (1)

  • Editorial team

    Row lengths of 10, 9 and 7 mean the shifts only repeat after 630 places, but this is a puzzle, not security: each letter stays in its own row, and digits and punctuation pass through untouched, so Hello, 2024! becomes Jraap, 2024! with a shift of 1. Also note that a shift of 10 leaves the top row unchanged while still moving the other two. What kind of puzzle are you building with it?

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