# dev HTML Playground: Web IDE — View, run & edit HTML with AI

> View, run & edit HTML with AI (iPhone/iPad app by KOICHIRO YAMAMOTO.)

- Source: https://appshunter.io/ios/app/dev-html-playground-web-ide/id6788730344 (this page in markdown: same URL + `.md`)
- Developer: [KOICHIRO YAMAMOTO](https://appshunter.io/developer/1191754397)
- Category: Developer Tools, Education
- Price: Free
- Age rating: 17+
- Requires: iOS 17.0 · 3 MB
- Languages: American English, Japanese
- Released: 2026-07-15
- Data updated: 2026-08-29
- User reviews in markdown: https://appshunter.io/ios/app/dev-html-playground-web-ide/id6788730344/reviews.md

## What is dev HTML Playground?

dev HTML Playground lets you build, run and view HTML/CSS/JavaScript entirely on your iPhone. No computer required.

WHO IT'S FOR
- You want to start programming but don't own a computer
- You want to build apps in spare moments on the train or sofa
- You want AI to write the code while you bring the ideas
- You want to show your kids how fun programming can be
- You want to quickly check HTML documents an AI wrote for you

FEATURES

Code Editor
A syntax-highlighted editor for HTML, CSS and JavaScript with autosave and file management (add, rename, delete). Smart quotes and other typing "corrections" that break code are disabled.

Instant Preview
Run your code with one tap. console.log output and errors appear in a built-in console, so you can debug entirely on your phone.

AI Integration
A ready-made environment prompt for AIs like ChatGPT and Claude. Paste it, and the AI asks "What would you like to build?" — just answer in plain words. Bring the returned code in with one tap using "Paste & Replace All". You can finish real apps with zero programming experience.

Safe Data Storage
Every project ships with storage.js, a simple persistence library. Your apps' data is stored safely and kept separate per project. It also works in regular browsers, so your creations are portable.

7 Templates
- Game (Crowd Rush): the real version of that "grow your crowd" ad game
- Game (Pull the Pin): the real version of that pull-the-pin puzzle from the ads
- Empty Project: start from a clean slate
- Basic Sample: learn the ropes with a counter and notes
- To-Do List: a practical task app
- Habit Calendar: a monthly habit tracker
- Game (NEON RUSH): a full neon mini-game demo

Add to Home Screen
Register your apps as Home Screen icons via Shortcuts and launch them like regular apps.

Export
Export as ZIP (for backup) or a single HTML file (for sharing). Send your work via AirDrop, save to Files, or continue editing on a Mac.

HTML Viewer
Copy any HTML (like a document an AI wrote) and view it with one tap. Everything you view is kept in a history, and you can import it as a project to edit.

Built-in Browser
A browser tab for research or chatting with AI sites, so the whole loop stays in one app.

About your AI
Works with any AI you like — ChatGPT, Gemini, Claude and more. Free AIs are fine; smarter ones just nail it on the first try more often. And if something breaks, dHP catches the error for you — copy it, paste it back to your AI, and it gets fixed.

Everything is free, with no ads. Your "I want to build something" — right in your pocket.


## Version history (last 4 releases)

### 1.3 — 2026-07-28

Two new games!

- New templates: "Crowd Rush" and "Pull the Pin" — real versions of those games you always see in ads (and truly ad-free). Playable right away, and a perfect base for asking AI to add stages
- "Copy code (for AI)" now includes the editing rules, so you can paste it into any AI and it just works
- Games switch between Japanese and English automatically

### 1.2 — 2026-07-25

A big usability update.

- Swipe from the left edge to go back inside your apps (for apps that support it)
- The top-left button is now "Close", so it's never confused with your app's own back button
- Confirmation dialogs (like delete confirmations) now appear correctly
- Fixed a blank white screen that could appear right after launch
- Fixed home-screen apps closing when you briefly switched to another app

### 1.1 — 2026-07-16

- New syntax check for pasted code: problems are flagged instantly, and you can copy them for your AI to fix
  - Runtime errors now appear on screen — copy and paste them to your AI to get a fix
  - Back up and restore your app data (copy as JSON or save to a file)
  - New option to erase all saved data of an app
  - Clearer visual boundary between your app and the dHP interface
  - Apps launched from a Home Screen icon now close just by going Home

### 1.0 — 2026-07-15

No release notes.

## More apps by KOICHIRO YAMAMOTO

- [KickAsh!](https://appshunter.io/ios/app/kickash/id6446430364)
- [BiryaniYaar](https://appshunter.io/ios/app/biryaniyaar/id6788695867)

All apps by KOICHIRO YAMAMOTO: https://appshunter.io/developer/1191754397

## Related topics

[dev web](https://appshunter.io/ios/topics/dev-web)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*