Preview · Edit · Download
A growing collection of browser-only tools for HTML, Markdown, JSON, and more. Everything stays on your device — no uploads, no accounts.
Preview
Render text formats with live preview.
HTML
Live preview in a sandboxed iframe.
Markdown
GitHub-flavored Markdown rendering.
JSON
Validate, format, and minify JSON.
YAML
Validate, format, and convert YAML to JSON.
CSV / TSV
Render delimited text as a table; convert to JSON.
XML
Pretty-print and validate XML.
TOML
Parse, validate, and convert TOML to JSON.
Mermaid
Render Mermaid diagrams to SVG.
SVG
Live preview SVG markup as a vector image.
LaTeX / Math
Render LaTeX math with KaTeX.
Encode
Encode, decode, and inspect tokens.
Utility
Everyday text & data helpers.