A1Z26 — Numbers ↔ Letters Tool

Classic mapping A=1, B=2, …, Z=26. Convert either way with flexible parsing.

Input

Offset (−26…+26)

Ignore non‑letters (L→N)

Keep spaces (L→N)

Number separator

Output

Letter case (N→L)

Treat 0 as space (N→L)

Preserve punctuation (N→L)

Tips: For Numbers → Letters, you can separate values by spaces, commas, dashes, slashes, or any mix. Non‑numeric characters are passed through when “Preserve punctuation” is on. Values outside 1–26 are ignored (except 0 if enabled).
Examples: 8 5 12 12 15, 8,5,12,12,15, 8-5-12-12-15