Developer Apps
Useful online tools for developers. Fast and easy to use, right in your browser.
Pretty JSON
Format and validate JSON data with syntax highlighting. Make unreadable JSON clear. No data is stored.
Pretty XML
Format and validate XML documents. Automatically add indentation for better readability. No data is stored.
Pretty YAML
Format and validate YAML files. Convert between JSON and YAML formats. No data is stored.
Base64 Encoding/Decoding
Encode and decode Base64 strings. Useful for data transformations and debugging. No data is stored.
Base64 Image Converter
Convert base64 strings to images and vice versa. Paste a base64 string to preview the image, or select an image to get its base64 string. No data is stored.
QR Code Generator
Generate QR codes from URLs. Fast and simple, right in your browser. No data is stored.
UUID Generator
Generate unique UUIDs (v4 and v7). Including bulk generation and validation. Privacy-friendly and fully client-side.
Unix Timestamp Converter
Convert Unix timestamps to readable date/time and vice versa. Live conversion with support for seconds, milliseconds and ISO 8601.
Cron Expression Builder
Visually build your cron schedules without memorizing syntax. With live preview, next runs and reverse mode. Monitor your jobs with CronGuard.
JWT Decoder
Decode and inspect JWT tokens. View header, payload and check expiration. 100% client-side for maximum privacy.
String Manipulation
Convert text to lowercase, uppercase, camelCase, PascalCase, snake_case, kebab-case and more. Right in your browser.
Network Calculator
Calculate subnets, IP ranges and network addresses based on CIDR notation. No data is stored.