Free Online Security & Utility Tools | 2FA Fast

Every tool on this page runs 100% in your browser using the Web Crypto API and vanilla JavaScript no data is ever uploaded to our servers. Whether you are generating a TOTP 2FA code, hashing a string with SHA-256, or creating a secure random password, all computation happens locally on your device the moment you interact with the tool. You can verify this by opening your browser's DevTools Network tab: you will see zero outbound requests carrying your data.

This approach means 2FA Fast tools work offline once the page is loaded, are safe to use on sensitive inputs like secret keys and passwords, and require no account or sign-up. The Secure Notepad stores notes in localStorage on your device only, and the 2FA Secret Generator draws entropy directly from the OS via crypto.getRandomValues() the same source used by TLS key generation.

2FA & Security

QR Code Generator

Generate an otpauth:// QR code from your 2FA secret. Scan with any authenticator app.

QR Code Decoder

Upload an image or use your webcam to decode any QR code instantly. Nothing uploaded.

2FA Secret Generator

Cryptographically secure Base32 secret generator for new 2FA setups.

Test WebAuthn passkeys and biometric authentication in your browser using native APIs.

Encoding & Conversion

Base32 Encoder/Decoder

Encode any text to Base32 or decode a Base32 string back to plain text.

Base64 Encoder/Decoder

Encode text or files to Base64 or decode Base64 strings. Supports URL-safe and file encoding.

URL Encoder/Decoder

Encode or decode URL strings with encodeURIComponent, encodeURI, or form-data format.

Convert plain text to hexadecimal and back. Supports UTF-8, spacing, and 0x prefix.

Multiline to Single Line

Convert multiline text, JSON, or XML to a single line with smart options.

Cookie Converter

Convert browser cookies between Netscape/header format and JSON.

Cryptography & Hashing

Hash & HMAC Generator

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes and HMAC signatures for any input.

Basic Auth Generator

Generate HTTP Authorization: Basic headers for API testing. Includes cURL command output.

Passwords

Password Generator

Generate multiple strong random passwords. Bulk generate, export to CSV or TXT.

Password Strength Meter

Analyze password strength and estimate time-to-crack. Entropy calculation and suggestions.

Text Tools

All-in-one text tool: case conversion, merge lines, replace, sort, encode, and more.

Percentage Calculator

Solve any percentage calculation: X% of Y, percentage change, increase/decrease, and more.

Productivity

A private notepad stored only in your browser's localStorage. Zero server sync.

Main 2FA Generator

Go back to the main TOTP 2FA code generator, the fastest way to get your authentication code.

Open 2FA Generator