Reference · 10 tools
Developer Reference & Viewer Tools
Reference and viewer tools give you instant data inspection and lookup without any conversion or configuration: explore JSON as an interactive tree, preview HTML live, render Markdown, view CSV as a table, validate YAML syntax, parse URLs, look up HTTP status codes and MIME types, browse the ASCII table, or count words and characters. Everything loads fully client-side — bookmark these pages for offline use anywhere.
URL Parser
Paste any URL to break it down into protocol, host, path, query parameters, and fragment — free and browser-based.
JSON Viewer
Paste JSON and explore it as an interactive tree — collapse nodes, search keys, copy paths, and see types at a glance.
Markdown Preview
Write markdown and see it rendered as HTML in real time — free, instant, and browser-based.
Word & Character Counter
Count words, characters, sentences, paragraphs, and reading time — free, instant, and browser-based.
HTML Viewer
Paste any HTML and see it rendered live in your browser — with tag counts, character stats, and a sanitized source view.
ASCII Table
Browse all 128 ASCII characters with decimal, hex, octal, and binary values — searchable and free.
YAML Validator
Validate YAML syntax and see errors with line numbers — free, instant, and browser-based.
CSV Viewer
Paste CSV data and view it as a formatted, scrollable table — free, instant, and browser-based.
HTTP Status Codes
Searchable reference of every HTTP status code — names, descriptions, and the RFCs that define them.
MIME Type Lookup
Bidirectional reference — find the MIME type for any file extension, or the extensions for any MIME type.