Convert Markdown, HTML and plain text locally in LocalKit. Templates and offline rendering—nothing uploaded for computation.
Interactive controls load with JavaScript. Processing stays in your browser—nothing is uploaded.
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How to use
Open Markdown ↔ HTML — Open the tool and wait for controls.
Choose direction — Pick MD→HTML, HTML→MD or Text→MD.
Paste content — Paste Markdown/HTML/text (or use a template).
Copy output — Copy the converted result.
Limits
Common Markdown subset only—not every GFM extension.
When to use
Drafting README/blog HTML offline without uploading drafts.
When not to use
When you need a full CommonMark/GFM compliance suite.
Privacy note
Conversion is local via a self-hosted engine.
FAQ（5）
Is Markdown rendered on a server?
No. Conversion uses a self-hosted Markdown engine in your browser.
Which Markdown features are supported?
Headings, lists, links, images, code blocks, bold/italic, blockquotes and hr—common subset, not every GFM extension.
Can I convert HTML back to Markdown?
Yes. Choose HTML → MD. Complex layouts may simplify.
Do templates leave my device?
No. Templates are static strings bundled with the page.
Will scripts in HTML run?
Conversion reads text via DOMParser; this tool is not an HTML sandbox for executing pages.
Developer
JSON Formatter — Beautify, minify and validate JSON in your browser with LocalKit. Catch syntax errors locally—no upload, no account, ideal for API payloads and config drafts.
Base64 Encode / Decode — Encode or decode Base64 text entirely in your browser with LocalKit. Handy for data URLs and tokens—processing stays on-device with nothing uploaded for computation.
URL Encode / Decode — Percent-encode or decode URL components locally in LocalKit. Prepare query strings and path segments without sending text to a remote encoder or creating an account.
Hash Generator — Compute MD5, SHA-1, SHA-256 and more digests locally in LocalKit. Verify checksums in your browser—hashes never leave your device and no account is required.
UUID / ULID / NanoID — Generate UUID v1/v4/v5/v7, ULID and NanoID locally in LocalKit.
Password Generator — Generate strong random passwords offline with Web Crypto in LocalKit. Optional ambiguous-character exclusion—secrets stay on-device with no account or upload.