RenderHub — 18 in-browser tools to preview, edit, encode & convert
A growing collection of browser-only tools for HTML, Markdown, JSON, YAML, CSV, XML, TOML, SVG, Mermaid, LaTeX, JWT, Base64, Diff, Regex, QR, Cron, Timezone, and CIDR. 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.
Diff
Side-by-side text comparison.
Regex
Test JavaScript regular expressions against text.
QR code
Generate QR codes from text or URLs.
Timestamp / Timezone
Convert a Unix timestamp across IANA timezones.
Cron
Parse cron expressions and preview upcoming runs.
IP / CIDR
Inspect IPv4 networks, masks, and ranges.