About

DeepSeek User Message Markdown Renderer is a userscript for DeepSeek web. It renders the Markdown, LaTeX math, and code blocks in your own messages with the exact native styles DeepSeek uses for assistant replies.

Features

• Native-style Markdown: headings, paragraphs, lists, inline code, links, and blockquotes.
• LaTeX math via KaTeX: $...$, $$...$$, \(...\), \[...\].
• Code blocks rebuilt into DeepSeek's official md-code-block structure: language banner, native light/dark themes, corner decorations, and Prism-style token colors.
• Hard line breaks in code blocks are preserved; unknown languages (e.g. mermaid) stay as clean code blocks without console warnings.
• Safe editing: the original message is restored before DeepSeek reads it, so the editor never crashes; cancel re-renders the message and empty placeholders are cleaned up.
• History highlight mirrored: clicking a message in the history panel flashes the bubble and fades it back out, matching the native behavior.
• Original DeepSeek nodes are never removed — they are hidden with CSS only, so React's references stay valid and re-rendering never throws.

Install & Update

Install with Tampermonkey. The script loads marked, highlight.js, and KaTeX from CDNs via @require, and auto-updates from GitHub when @updateURL / @downloadURL are enabled.

Compatibility

Tested against the current DeepSeek web build. The script relies on some hashed CSS class names that DeepSeek occasionally changes; a small header/class update may be needed after their big UI releases.

Links

• GitHub: github.com/NIyueeE/deepseek-user-message-renderer
• Issues: GitHub Issues
• License: MIT