Full-text search in Markdown notes with regex, tag filtering, and match highlighting. 100% local.
About this tool
Search Markdown notes with full-text matching, regex patterns, and #tag filtering. Highlights matched terms. 100% in-browser, free.
What Is the Markdown Search Tool?
The Markdown Search tool is a free browser-based utility that performs full-text search across Markdown content with advanced features. Unlike basic grep or find commands, this tool understands Markdown structure — it extracts #tags for filtering, highlights matched text in context, and supports regular expressions for complex pattern matching. All processing happens locally in your browser using JavaScript — no notes, files, or content are uploaded to any server. The tool handles large Markdown documents efficiently and provides line-by-line results with surrounding context for quick scanning.
Who Should Use This Tool?
Developers search through project documentation, README files, and technical specs stored in Markdown. Writers and bloggers find specific phrases across their content drafts. Knowledge workers search Obsidian, Logseq, and other Markdown-based PKM notes. Students search through lecture notes and study guides. DevOps engineers search through Docker Compose, Kubernetes YAML, and CI/CD configs that include Markdown comments. Privacy-conscious users prefer this tool because sensitive notes, project details, and personal data never leave the browser.
How to Use the Markdown Search Tool
Paste Markdown content into the input panel or upload a .md file using the Upload button. Type your search query in the search box — use plain text for simple matching or toggle Regex for pattern-based search. Toggle case sensitivity with the Aa button. Click any #tag button to filter results to lines containing that tag. Results show each matching line with highlighted matches and surrounding context lines. Line numbers help you navigate back to the original document. All search happens instantly in your browser — no network requests.
Frequently asked
Can I search multiple Markdown files at once?
Currently, you can search one document at a time. Paste the content of your Markdown file or upload it using the Upload .md button. The tool processes it instantly in your browser.
Does it support regular expressions?
Yes. Toggle the Regex button to enable regex mode. Enter any valid JavaScript RegExp pattern in the search box. Invalid patterns are handled gracefully without errors.
How does tag filtering work?
The tool automatically extracts #tags from your Markdown content and displays them as clickable buttons above the results. Click a tag to filter matches to lines containing that tag. Click again to remove the filter.
Is my Markdown content uploaded to a server?
No. All search and processing happens 100% in your browser. Your Markdown notes, documents, and content never leave your device. There are no network requests — everything runs in JavaScript locally.
Related tools
Why did the fish blush?
No paywalls, no signups, no data sold. Built by a solo developer who believes useful tools should be accessible to everyone.
☕Support me on Ko-fi— keep tools free100% of proceeds go towards hosting & building more free tools.