---
title: "Free HTML and Markdown Tools – Display"
description: "Free browser tools to view and share HTML and Markdown. They run in your browser, and each one can give your result a link that you can send."
---

# Free tools for HTML and Markdown

View the documents that you and your agents write. The tools run in your browser. When you want to send the result to someone, select Get a link.

## View and preview

- [HTML viewer](https://display.dev/tools/html-viewer.md): Paste HTML or drop an .html file to see the rendered page at phone, tablet and desktop widths. Free, runs in your browser, no account.
- [Markdown viewer](https://display.dev/tools/markdown-viewer.md): Paste Markdown or drop a .md file to read it as a formatted document with tables, code and links. Free, runs in your browser, no account.
- [Mermaid viewer](https://display.dev/tools/mermaid-viewer.md): Paste Mermaid code to see the diagram. Flowcharts, sequence, class, state and Gantt diagrams. Download SVG or get a link. Free, runs in your browser.

## Convert

- [CSV to HTML table](https://display.dev/tools/csv-to-html-table.md): Paste CSV or drop a .csv or .tsv file to get a clean HTML table that you can sort and filter. Copy the HTML or get a link. Free, runs in your browser.
- [HTML to Markdown](https://display.dev/tools/html-to-markdown.md): Paste HTML or drop an .html file to get clean Markdown with headings, lists, tables, links and code blocks. Free, runs in your browser, no account.
- [Markdown to PDF](https://display.dev/tools/markdown-to-pdf.md): Paste Markdown or drop a .md file and save it as a PDF with tables, code blocks and links. Free, runs in your browser, no upload.

## Check before you share

- [AGENTS.md checker](https://display.dev/tools/agents-md-checker.md): Paste an AGENTS.md or CLAUDE.md file to check its length, sections, commands, links and likely secrets. Each check names its source. Free, runs in your browser.
- [Diff checker](https://display.dev/tools/text-diff.md): Paste two versions of a text to see what changed, line by line and word by word. Free, runs in your browser, and gives you a link when you want to send it.
- [HTML share check](https://display.dev/tools/html-share-check.md): Find what breaks or leaks when you send an HTML file – missing files, local URLs and likely API keys. Free, runs in your browser.
- [MCP config validator](https://display.dev/tools/mcp-config-validator.md): Check an MCP config for Claude Desktop, Claude Code, Cursor, VS Code or Codex. Find syntax errors, wrong fields and API keys. Nothing leaves your browser.

## Write and format

- [ChatGPT output formatter](https://display.dev/tools/markdown-viewer/chatgpt.md): Paste a ChatGPT reply to read it as a formatted document. The tool removes citation marks and copy problems, renders tables and code, and copies formatted text.
- [Markdown table generator](https://display.dev/tools/markdown-table-generator.md): Type in a grid or paste cells from a spreadsheet or CSV to get a Markdown table. Set alignment per column and copy the table. Free, runs in your browser.