RendrLab vs HTML Opener

Rendr is a simple, offline viewer for the React and web files you already keep on your device. Open a folder of your .jsx, .tsx, and .html files through the Files app, and Rendr renders each one in a clean, full-screen preview using a built-in React + web runtime. There is no build step, no setup, and no servers. Everything happens on your device. WORKS WITH YOUR OWN FILES Rendr reads files from a folder you choose through the Files app. It has no catalog and no store, and it downloads nothing; it only shows the files that are already on your device. • Pick any folder and Rendr lists the .jsx, .tsx, and .html files and subfolders inside it • Nested folders are supported, with a tappable breadcrumb so you always know where you are • Search within a folder and across your whole tree • Sort by name or date modified • Smart automatic icons from folder names (plus a custom icon and color for any item) • Pull to refresh to pick up new files • Add files to Rendr from other apps via the share sheet • Universal: iPhone and iPad, with a split view on iPad FULLY OFFLINE AND PRIVATE Files are rendered in a sandboxed runtime that is blocked from all network access. Nothing is uploaded, nothing is downloaded, and nothing phones home. Rendr collects no data: no accounts, no analytics, no tracking. The folder you choose is read only on your device, and the app saves just a secure bookmark and your display preferences locally. GOOD TO KNOW • Rendr is offline by design. Files that try to load remote data or call the network won't fetch anything. Rendr is for previewing self-contained files you already have, not for browsing the web. • It runs a fixed, built-in React + TypeScript + web runtime. Self-contained files render best; files that depend on external packages may not render in full. • Rendr renders your files; it doesn't edit them. Rendr is a focused, private way to preview the React and web files you already keep on your device.

When you open an HTML file in the iPhone Files app, iOS just dumps lines of raw code on your screen. Buttons do not work, styles break, and Safari cannot open local file links. HTML Opener fixes that. It runs your local HTML, CSS, JavaScript, and images in a real WebKit browser directly on your iPhone and iPad. No Mac, no terminal, and no local server required. WHAT IT SOLVES - Files app dumps raw code and text on screen instead of rendering the webpage - Safari has no address bar option to open local file:// links - Opening a single file breaks CSS styles and image assets in neighboring folders - Setting up a local server on your computer just to check mobile layout is tedious REAL WEBKIT BROWSER RENDERING Built on iOS's native WKWebView engine. Buttons, forms, CSS styling, canvas animations, and modern JavaScript run exactly as they would in Safari. OPEN AN ENTIRE PROJECT FOLDER Select a folder containing style.css, script.js, and an images directory alongside your HTML file. All relative file paths resolve automatically with zero broken images or missing styles. DESKTOP & MOBILE VIEW TOGGLE Switch between phone layout and 1024px desktop view with a single tap. Review horizontal dashboards, data tables, and desktop web tools without broken layouts. FULLSCREEN MODE Hide navigation bars and margins to give your web content the entire display. Web apps and tools feel like installed native apps. FOUR SIMPLE ACTIONS 1. Open a local file or folder 2. Quick Switcher to jump between recent projects 3. Auto-launch your primary tool as soon as the app starts 4. Clear cache, toggle dark theme, and customize display options WHO IT IS FOR - Anyone stuck when iPhone opens HTML as raw code - Developers and designers testing web prototypes on actual iOS hardware - Anyone running self-built dashboards, calculators, or tools on the go - Students learning web development who want instant mobile testing PRO (ONE-TIME PURCHASE, NEVER A SUBSCRIPTION) Removes ads completely. Pay once, use forever. Compatible with iPhone and iPad, iOS 17.0 or later. Stop dealing with raw code dumps. Open real interactive web pages with HTML Opener.