Category · 9 tools
Converters
Convert between formats and representations: data formats, colors, CSS units, timestamps, and character encodings; compress and convert images between WebP, PNG, and JPEG (including iPhone HEIC photos); plus round-tripping between UML class diagrams and source code, and breaking a URL into its parts.
Code to UML
Turn TypeScript or Java source into a Mermaid class diagram — classes, interfaces, enums, fields, methods, inheritance, and interfaces — rendered live in your browser.
works well with UML to Code
Color Converter
Convert colors between HEX, RGB, HSL, HSV, and OKLCH, with a picker, alpha, and a WCAG contrast checker — all in your browser.
works well with CSS Unit Converter
CSS Unit Converter
Convert between CSS units — px, rem, em, pt, vw, vh, and more — with live visual feedback and a full conversion table.
works well with Color Converter
Encoder / Decoder
Encode and decode text with Base64, URL, and Hex — UTF-8 safe, instant, and fully in your browser.
works well with Hash Generator
HEIC to JPG Converter
Convert iPhone HEIC/HEIF photos to JPG, PNG, or WebP — fast, multi-threaded batch conversion entirely in your browser. Nothing is uploaded, and location and metadata are removed by default.
Image Compressor
Fast, multi-threaded image compression — shrink many images at once by quality or to a target file size, with WebP/JPEG output and optional resizing, entirely in your browser.
Image Converter
Convert, resize, and compress images between PNG, JPEG, and WebP, or copy them as a Base64 data URI — entirely in your browser.
works well with Metadata Inspector
Timestamp Converter
Convert between Unix epoch time and human-readable dates — seconds, milliseconds, ISO 8601, UTC, time zones, and relative time.
works well with URL Inspector
UML to Code
Turn a Mermaid class diagram into TypeScript, Python, Java, or C# code — classes, interfaces, enums, inheritance, and relationships — live in your browser.
works well with Code to UML