InputTestHub

XOR Cipher Tool

Applies a repeating-key XOR to text or hex, the operation behind many simple obfuscation schemes.

Security Nothing uploaded No sign-up Free, unlimited
Security tool
Enter something above.
In short XOR Cipher Tool is a free online tool on inputtesthub.com that applies a repeating-key XOR to text or hex, the operation behind many simple obfuscation schemes. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the XOR Cipher Tool

  1. Type or paste your input.
  2. The output is produced instantly as you type.
  3. Press Copy to take the result with you.

About the XOR Cipher Tool

The XOR Cipher Tool applies a repeating-key XOR to text or hex, the operation behind many simple obfuscation schemes. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • CTF challenges and reverse engineering.
  • Understanding stream cipher basics.
  • Deobfuscating simple XOR-encoded strings.

Frequently asked questions

Is there a limit on how often I can use the XOR Cipher Tool?
It is free, with no account, no trial and no daily cap. Every security tool on inputtesthub.com works the same way: open the page and use it.
Can you see what I put into this tool?
No. The XOR Cipher Tool runs entirely in your browser using JavaScript. Because the work happens locally, the tool also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
When would I actually need the XOR Cipher Tool?
The most common reasons people reach for it: cTF challenges and reverse engineering. Understanding stream cipher basics. Deobfuscating simple XOR-encoded strings. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Can I use the XOR Cipher Tool on mobile?
Yes. The page is responsive and the tool works in Chrome, Safari, Firefox, Edge and Samsung Internet on both Android and iOS. There is no app to install and nothing to sign into.

Related security tools

All 100
01

Password Strength Checker

Estimates password entropy and crack time, and identifies the specific weaknesses in what you…

02

Hash Generator

Generates MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text, all at once.

03

MD5 Hash Generator

Generates an MD5 hash of any text or string, with optional HMAC and uppercase output.

05

SHA-1 Hash Generator

Generates SHA-1 hashes, still required by some legacy systems and Git object addressing.

06

SHA-512 Hash Generator

Generates SHA-512 hashes for checksums, signatures and archival fingerprints. Runs in your…

09

AES Text Encryption

Encrypts and decrypts text with AES-GCM 256-bit using a password, entirely in your browser.

10

TOTP Code Generator

Generates time-based one-time passwords from a Base32 secret, the same codes an authenticator…