HTML to Markdown
HTML to Markdown converter: full HTML or reader-mode article extraction to Markdown.
Markdown Reference
Comprehensive reference for CommonMark, GitHub Flavored Markdown (GFM), and Obsidian callouts with examples for all features.
File Type Detection
Identify file types using AI-powered detection. Works entirely in your browser with support for text and binary files.
Base Encoding Guide
A comprehensive guide to base encoding formats including Base64, Base32, Base58, and their use cases.
How UUIDs work
UUID format, versions v1 through v8, and their trade-offs. When to pick v4, v7, or v5.
Base Encoding & Decoding Tool
Encode and decode text using Base64, Base64 URL-safe, Base32, Base58, or custom alphabets.
UUID Generator
UUIDs (Universally Unique Identifiers) v1-v7 with bulk generation.
Data Serialization Formats
Exploring Protobuf, Cap'n Proto, FlatBuffers, Avro, and Thrift.
Parts of a URL
WHATWG vs RFC 3986 vocabulary, the structure of a URL, and why one component has two specs that disagree on its boundaries.
HTML & URL Encoding Reference
Reference for HTML entities and URL encoding.
ASCII Reference
ASCII character encoding reference.
How Unicode works
How Unicode encodes text. Code points, graphemes, UTF-8 vs UTF-16 vs UTF-32, surrogates, normalization, and string length.
How to deal with time
A comprehensive guide on how to work with local time, instants, dates and timestamps. Understand how time, time zones and offsets work to avoid bugs and mistakes when writing software.