OpenHTML Blog
Practical guides for every file the app opens: HTML, Markdown with LaTeX math, ZIP web projects, JSON, XML and source code — plus debugging pages right on your iPhone or iPad.
How to Open an HTML File from ChatGPT or Claude on iPhone
ChatGPT gave you an HTML file and your iPhone shows plain text or a blank page? Three ways to open AI-generated HTML properly on iOS — and how to fix the page when it renders broken.
Updated 2026-08-09
How to Open HTML Files on iPhone: The Complete Guide
Every way to open an .html file on iPhone or iPad — Files preview, Safari tricks and dedicated viewers — what each method can and cannot render, and how to open pages with styles and scripts intact.
Updated 2026-08-09
How to View Markdown Files on iPhone — with LaTeX Math
Open .md files on iPhone with formulas rendered properly: $…$ and $$…$$ LaTeX math, tables, code highlighting — fully offline, no subscription. The complete Markdown-on-iOS workflow.
Updated 2026-08-09
How to Open and Run a ZIP Web Project on iPhone or iPad
Got a zipped website or web project? How to import it on iPhone/iPad with working relative paths, run fetch() and ES modules on a private local server, and export a clean result — no Mac needed.
Updated 2026-08-09
How to View JSON, XML and Source Code Files on iPhone
Open .json, .xml, .css, .js, .svg, .yaml and other code files on iPhone with syntax highlighting, search and line numbers — offline and private. One viewer for every text-based format.
Updated 2026-08-09
How to Debug a Web Page on iPhone — Without a Mac
Inspect the DOM, read console errors, watch network requests and test responsive layouts directly on iPhone or iPad — no Mac, no cable, no remote Safari. On-device web debugging, step by step.
Updated 2026-08-09
Why Your HTML File Looks Broken in iOS Files Preview
HTML file shows as plain text, loses its styling or stays blank on iPhone? That's the Files preview, not your file. What iOS strips out, why, and how to see the page as it really is.
Updated 2026-08-09