Text Encrypt & Decrypt
Encrypt and decrypt text with AES-256-GCM in your browser.
Keys are derived using PBKDF2 (SHA-256) with 100,000 iterations and a unique 128-bit cryptographic salt for every encryption.
Zero Plaintext Leaks · 100% Client-Side Privacy
All cryptographic operations occur directly in your browser using the native Web Crypto API (window.crypto.subtle). Neither your secret password nor your plaintext text is ever transmitted over the network or saved to any server. AES-GCM provides authenticated encryption that guarantees both confidentiality and tamper detection.
How to Use Text Encrypt & Decrypt
Select or Upload
Choose your file or paste your input into the workspace above. Drag and drop is supported.
Configure & Process
Adjust options to fit your task. Processing runs immediately with no waiting queue.
Download Result
Preview and save your output in one click with no watermarks or sign-up prompts.
Private & Confidential
Browser tools process files locally on your device, and server temporary files are deleted automatically within 15 minutes.
Free & No Registration
Full access to every utility without creating an account, signing in, or hitting paywalls.
Works on Any Device
Responsive layout that runs smoothly on desktop, tablet, and mobile browsers across all operating systems.
Frequently Asked Questions
Is Text Encrypt & Decrypt completely free to use?
Yes, Text Encrypt & Decrypt on KiloToolbox is 100% free with no limits, hidden fees, or account sign-up required.
Are my files safe and private?
Yes. Text Encrypt & Decrypt processes all files directly inside your web browser using client-side JavaScript and WebAssembly. Your files never leave your computer or mobile device and are never uploaded to any remote server.
Can I use Text Encrypt & Decrypt on mobile phones and tablets?
Yes, KiloToolbox is fully responsive and runs smoothly on iPhone, Android, iPad, Mac, Windows, and Linux.