OneMarkup: File Viewer

Preview most files locally, or run trusted HTML and ZIP packages as isolated mini apps.

Open and inspect the files people actually send you—from Files, Mail, WeChat, and any app that shares documents. Ordinary file preview, search, and editing stay on your device, with no account, ads, analytics, tracking, or in-app purchases.

PREVIEW MORE FILES • PDF, common and modern image formats including WebP and AVIF, Office/iWork, audio/video, and USDZ with iOS system controls • Complete ZIP website exports with index.html plus local CSS, images, fonts, and media • CBZ comics, ZIP-compatible package contents, GLB structure, fonts, certificates, property lists, email, source files, and unknown binaries

READ AND EDIT Read Obsidian-style Markdown with a table of contents, heading jumps, tasks, callouts, footnotes, frontmatter, tags, and wide tables. Edit text-based formats through a Files-visible working copy while the original stays untouched.

TRUSTED HTML MINI APPS HTML and ZIP websites open as isolated trusted-network mini apps by default: JavaScript and package assets can run, while network access is limited to HTTPS/WSS. Switch to Offline Mini App or Safe Preview at any time. HTTP/FTP, embedded frames, unexpected in-view navigation, and arbitrary access to other local files remain blocked. Webpage code can still contact third-party servers or send information you enter when its own logic requests it.

QUICK ACCESS Recent files automatically appear in widget choices. Add multiple OneMarkup widgets, then choose a different file, name, and icon for each—including HTML mini apps. Small files are kept as local copies by default so source permissions cannot strand a shortcut.