Text Decryptor
Decrypt Caesar-cipher text by reversing a chosen shift.
Quick answer
Decrypt Caesar-cipher text by reversing a chosen shift.
How do I use the Text Decryptor?
- 1
Paste the encrypted text.
- 2
Set the shift used to encrypt it.
- 3
Copy the decrypted output.
What is the Text Decryptor?
The Text Decryptor reverses a Caesar cipher for any known shift value. Pair it with the Text Encryptor to build round-trip puzzles or classroom demonstrations.
Who is the Text Decryptor for?
Teachers, students, escape-room designers, and puzzle enthusiasts.
Why use the Text Decryptor?
- Any shift value.
- Preserves case and non-letters.
- Instant preview.
- Deterministic output.
- Runs offline.
When should I use the Text Decryptor?
- Classroom examples.
- Solving puzzle challenges.
- Escape-room clues.
- Reversing ROT13.
- Verifying round-trip encryption.
Is the Text Decryptor safe and private?
Yes. This tool runs entirely inside your browser - your text is never uploaded, stored on our servers or shared with third parties. You can even disconnect from the internet after the page loads and it will keep working. That makes it safe for confidential notes, drafts, private messages and unpublished work.
How do I get the best results from the Text Decryptor?
- If you don't know the shift, try 1–25 - one will read as English.
- Use Text Encryptor to build the puzzles first.
- Caesar is a teaching cipher - not real security.
- Combine with word tools to score decrypted attempts.
Frequently asked questions
What if I don't know the shift?
Try each value from 1 to 25 - a Caesar cipher has only 25 possible shifts. The one that produces readable text is correct.
Does it handle mixed case?
Yes - case is preserved and non-letters pass through.
Is my text uploaded?
No - decryption runs locally.
Will it decrypt ROT13?
Yes - use shift 13.
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