ROT13 · CAESAR CIPHER · RUSSIAN AND ENGLISH

Encode and decode with ROT13 or Caesar

Apply ROT13 or choose a Caesar cipher shift to transform English and Russian letters. Punctuation, spaces, and line breaks can be preserved.

Enter text, select the cipher and shift, then copy the result or review the text statistics.

Hides Caesar shift setting and parsing options.

01 / SOURCE TEXT Up to 200,000 UTF‑16 units · Russian and English

Enter text in Russian or English

02 / SELECT OPERATION

Converting text

FAST CONVERSION

ROT13

Reapplying returns the original Latin letters

Each Latin letter is shifted by 13 positions. Cyrillic, numbers, signs and spaces remain unchanged.

CUSTOM MODE

Caesar cipher

Shift is applied separately to each selected alphabet

Alphabet Shift

Direction Encrypt Decrypt

The search shows all non-zero shifts in the supported range: 25 values for the Latin alphabet and 32 for the Cyrillic alphabet or a common shift of two alphabets. The volume of text to be searched is limited to 50,000 UTF‑16 units.

ROT13 and the Caesar cipher are suitable for simple text transformation, but do not protect sensitive data.

04 / RESULT

You can edit the result

TEXT OVERVIEW

Result statistics

updating automatically

Characters0Unicode graphemes, including spaces

Without spaces0tabs and line breaks are excluded

Words0Cyrillic and Latin

Lines0empty text — 0 lines

No result yet. Statistics for the source text are shown.

ROT13 converter and Caesar cipher capabilities

Use ROT13 for fast, reversible conversion of Latin letters, or configure the Caesar shift for English, Russian, or both alphabets at once. The shift direction can be changed, and enumeration helps compare transcript options in short fragments.

ROT13 changes A-Z and a-z, but leaves Cyrillic, numbers, emoji and punctuation at places;
Caesar cipher supports the Latin alphabet, the Russian alphabet of 33 letters with E, or both alphabets;
set up the 0 to 32 offset and separate actions for encryption and decryption;
shows non-zero shift options with candidate preview;
allows you to edit, copy, download the result and see text statistics;
Supports Russian and English text, including the letter Ё.

ROT13 and Caesar Cipher - Simple educational and fun obfuscation techniques. They do not provide confidentiality and should not be used in place of modern encryption.