QR Code Utility
Generate QR codes from any text or URL, and decode QR codes by uploading or pasting an image.
Open tool →JWT Decoder & Encoder
Decode, inspect, and re-sign JSON Web Tokens. Edit header and payload, switch algorithms, and generate HS256 signatures.
Open tool →OAuth2 / OIDC
Build and send OAuth2 / OpenID Connect authorization requests. Supports PKCE, nonce, and state. Exchange authorization codes for tokens.
Open tool →IK Generator
Generate a valid German Institutionskennzeichen (IK) number with correct Luhn checksum, starting with prefix 3001.
Open tool →Group Assignment
Randomly assign training participants into groups. Drag and drop to adjust, reset assignments or everything. State is persisted across sessions.
Open tool →Punycode Encoder & Decoder
Convert internationalized domain names (IDN) between Unicode and their ASCII-compatible Punycode representation. Detect homograph phishing domains.
Open tool →TOTP Generator
Generate current, previous, and next TOTP codes from an otpauth URI. Includes a countdown timer and code history table.
Open tool →oose Trainingsübersicht
Overview of oose training courses and seminars with scheduling and availability information.
Open tool →