Markdown toolbox with four converting tabs — Markdown to HTML source, plain text to Markdown, HTML to Markdown, and Markdown to plain text. Own every .md workflow in one tab — local processing, free, no signup.
Content reviewed October 2026 · About Toolzum
Convert a single Markdown document to styled HTML or plain-text PDF with three built-in themes. One document at a time — local Marked + jsPDF, free, no signup.
Strip Markdown to clean plain text for emails, captions, and analysis. Remove every # and * correctly — local conversion, free, no signup.
Convert plain text to clean HTML with paragraphs, breaks, lists, and escaping. Turn meeting notes into publishable markup — local conversion, free, no signup.
All-in-one JSON output hub — format, validate, convert to Zod, URL params, flat pairs, JSON-LD, and size analysis. One tab for every JSON chore — local processing, free, no signup.
Scale one image to exact pixel dimensions — width/height fields prefill from the source — with optional aspect-ratio lock, PNG/JPEG/WebP output picker, and quality control for JPEG/WebP. Files over 50MB are rejected; resizing runs on plain canvas drawImage locally.
Four converters: Markdown→HTML source via marked, plain text→Markdown (non-empty lines joined as spaced paragraphs), HTML→Markdown via Turndown (ATX headings, fenced code blocks), and Markdown→plain text via markup stripping. No linting, formatting, or table builder — conversion only.
The Preview tab shows copyable HTML source in a code pane (with Save .html), not a rendered page. GFM tables parse through marked; verify rendering by pasting the HTML into your CMS.
No — non-empty lines are trimmed and joined with blank lines; headings, lists, and emphasis are never inferred. Apply structure yourself after converting.
No — all operations run locally in your browser. Text never leaves your device.
Bulk Markdown to PDF/HTML
Convert a single Markdown document to styled HTML or plain-text PDF with three built-in themes. One document at a time — local Marked + jsPDF, free, no signup.
HTML to Text Converter
Strip HTML to clean plain text for emails, docs, and analysis. Extract article text without tags — local conversion, free, no signup.