Which languages can it detect?

It detects Python, JavaScript, Rust, Go, C++, SQL, and Bash using multi-line scoring heuristics. It checks shebang lines first (#!/usr/bin/python), then scores based on syntax patterns like def, fn, func, #include, SELECT, and more. Single-line fallback heuristics cover additional cases.

What if it detects the wrong language?

Detection uses conservative scoring (minimum 2 points from multiple patterns) to avoid false positives. When detection confidence is low, the code block is left without a tag rather than guessing wrong. You can always add the tag manually after fixing.

Does it fix anything else besides code blocks?

Yes. Code block fixing is one of five fix plugins that run together. The full pipeline also repairs heading levels, aligns tables, cleans lists, removes empty paragraphs, and strips AI filler phrases.

Can I use this for code from Copilot or other AI coding tools?

Yes. Any source that produces code blocks without language tags will benefit — ChatGPT, Claude, Gemini, Copilot, exported Markdown files, and more.

Fix Code Blocks Without Language Tags

AI assistants and Markdown exports often produce code blocks without language identifiers — ``` instead of ```python. This means no syntax highlighting when you paste into Notion, Obsidian, or other tools. Notion Formatter detects the language automatically and adds the correct tag.

Fix messy formatting

Paste content from ChatGPT, fix broken tables, headings, lists, and code blocks. Copy directly into Notion.

Common issues this fixes

Code blocks from AI responses are missing language tags, losing syntax highlighting
Notion displays untagged code blocks as plain text with no coloring
Manually adding language tags to every code block is tedious
Some Markdown exporters strip language identifiers from fenced code blocks

How it works

1Paste your Markdown with untagged code blocks into the editor
2Click "Fix Formatting" — language is auto-detected via shebang lines and syntax patterns
3Copy the output — code blocks now have correct language tags for syntax highlighting

Frequently asked questions

Which languages can it detect?: It detects Python, JavaScript, Rust, Go, C++, SQL, and Bash using multi-line scoring heuristics. It checks shebang lines first (#!/usr/bin/python), then scores based on syntax patterns like def, fn, func, #include, SELECT, and more. Single-line fallback heuristics cover additional cases.
What if it detects the wrong language?: Detection uses conservative scoring (minimum 2 points from multiple patterns) to avoid false positives. When detection confidence is low, the code block is left without a tag rather than guessing wrong. You can always add the tag manually after fixing.
Does it fix anything else besides code blocks?: Yes. Code block fixing is one of five fix plugins that run together. The full pipeline also repairs heading levels, aligns tables, cleans lists, removes empty paragraphs, and strips AI filler phrases.
Can I use this for code from Copilot or other AI coding tools?: Yes. Any source that produces code blocks without language tags will benefit — ChatGPT, Claude, Gemini, Copilot, exported Markdown files, and more.