Markdown Preview
Live GitHub-flavored markdown preview with synced scroll, table and task-list support, and one-click HTML export. Renders in your browser so your draft stays private.
Preview appears here…
How to preview markdown online
Paste markdown into the left pane — the right pane renders it as you type. Tables, fenced code blocks, task lists, strikethrough, autolinks, and inline HTML all work (GitHub-Flavored Markdown, the dialect almost every modern wiki and code host uses). Sync scroll keeps both panes aligned by default; untick it if you want to scroll them independently.
Why a local markdown previewer matters
Markdown drafts usually contain sensitive material — README files with example API keys in code blocks, pre-publication blog posts, internal runbooks, customer-facing replies being polished, design docs. Uploading them to a third-party renderer is a needless leak. ToolChop renders entirely in your browser so the draft never leaves your machine, and the preview updates with no roundtrip latency.
What you can do
- Live GFM preview with synced scroll
- Tables, fenced code blocks, task lists, strikethrough, autolinks
- Copy markdown, copy rendered HTML, or download as .html
- Live word count, character count, and reading-time estimate
- Works offline once the page is loaded
Frequently asked questions
How do I preview markdown online for free?
Paste your markdown into the left editor. The rendered HTML appears on the right and updates as you type. Sync scroll keeps both panes aligned. Copy the markdown, copy the rendered HTML, or download the HTML — all from buttons at the top of each pane. No account, no upload, no daily limit.
Does ToolChop send my markdown to a server?
No. Rendering runs entirely in your browser using a local markdown parser. Your draft never leaves your device — important when you are previewing a README that contains API keys in code blocks, a pre-publication blog post, internal documentation, or customer support replies.
Why is the privacy story for a markdown preview important?
The markdown you paste into a previewer is usually unfinished: README drafts (often with example API keys or internal URLs), blog posts before publication, customer-facing replies being polished, internal runbooks. Uploading any of that to a third-party renderer is a needless data leak. ToolChop renders entirely in your browser.
What markdown flavor does ToolChop render?
GitHub-Flavored Markdown (GFM) — the dialect GitHub, GitLab, and most modern wikis use. That covers tables, fenced code blocks with language hints, task list checkboxes ([ ] / [x]), strikethrough (~~text~~), autolinks, and inline HTML. Standard CommonMark works too.
Will my preview look the same as on GitHub or GitLab?
The structure will match exactly (headings, lists, tables, code blocks). The visual styling is close but not pixel-identical — GitHub uses its own theme, ToolChop uses a clean prose style. Copy the rendered HTML to test in your target environment if pixel-precision matters.
Can I copy the rendered HTML?
Yes. The Copy HTML button at the top of the preview pane puts the raw <h1>, <p>, <ul>, etc. on your clipboard — useful for pasting into a CMS that accepts HTML, an email composer, or a Confluence/Notion source view. Download .html exports the same as a standalone file.
Does it support tables?
Yes — pipe-delimited tables with the standard GFM syntax. Use --- for the header separator. Cell alignment with :--- (left), :---: (center), and ---: (right) works as expected.
Does it support code syntax highlighting?
Fenced code blocks render with monospaced styling and preserve language hints in the class name (class="language-js"). For full per-language syntax coloring, paste the rendered HTML into a host that runs a highlighter (Prism, highlight.js) — ToolChop keeps the preview lightweight and dependency-free.
Are inline HTML and embedded images allowed?
Inline HTML is rendered as-is, which matches GitHub's behavior. Images referenced by URL display in the preview if the browser can fetch them; if they fail to load (cross-origin, private), only the alt text shows. Because rendering is local, there is no server proxy — your browser fetches images directly.
What about script tags or onclick handlers?
Be aware: the preview renders HTML you paste, so a deliberate <script> in your markdown could execute. Since you are previewing your own markdown in your own browser, the practical XSS threat is empty — but if you plan to paste rendered HTML into someone else's site, strip scripts first.
Is there a word count or reading time?
Yes — both appear at the top of the toolbar. Word count strips markdown punctuation for accuracy, and reading time estimates at 220 words per minute (the average adult reading speed for online prose).
Why use ToolChop instead of a markdown preview that uploads my draft?
Privacy and speed. Markdown drafts often contain sensitive details — internal URLs, draft phrasing, embedded credentials, pre-publication content. ToolChop renders entirely in your browser, so the draft never leaves your machine and updates instantly with no roundtrip latency.