Generate TOTP URIs for two-factor authentication setup with authenticator apps. Everything runs locally in your browser — nothing is uploaded.
Generate OAuth authorization URLs for Google, GitHub, Facebook, Microsoft, and LinkedIn with custom client ID, redirect URI, and scope.
Generate secure API keys with configurable length, character set, and optional prefix. Use with any authentication scheme.
Generate HMAC signatures using a secret key and hash algorithm for API authentication. Everything runs locally in your browser — nothing is uploaded.
Calculate the GCF/GCD of two or more numbers. Shows the prime factorization method step by step. Everything runs locally in your browser — nothing is uploaded.
Generate SVG image placeholders as base64 data URIs with configurable dimensions and random background colors for prototyping. Everything runs locally in your browser — nothing is uploaded.
Two-Factor Auth Generator lets you generate TOTP URIs for two-factor authentication setup with authenticator apps. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Generate TOTP URIs for two-factor authentication setup with authenticator apps. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Configure your settings below — the output generates instantly.
Yes. After the initial page load, Two-Factor Auth Generator runs entirely on your device with no internet connection needed. All processing is done locally.
Generate TOTP URIs for two-factor authentication setup with authenticator apps. Everything runs locally in your browser — nothing is uploaded. All processing runs locally — no code is sent to any server.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check the tool description for specifics.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. Formatters use well-known libraries (sql-formatter, Prettier-compatible patterns) and follow widely adopted rules.
Password Entropy Calculator
Calculate password entropy in bits to measure password strength against brute-force attacks. Everything runs locally in your browser — nothing is uploaded.
JWT Inspector
Deep-inspect JWT tokens with expiry validation, algorithm analysis, and claim details. Everything runs locally in your browser — nothing is uploaded.