Simple Viewer vs Gwtar Viewer

Simple Viewer opens files. Quietly, quickly, and without asking for anything in return. Share any file from any app — Mail, Messages, Files, a browser, a cloud drive — and Simple Viewer renders it the way it was meant to be read. No account. No upload. Files stay on your device. It is designed for the moment when you just need to see what's inside a file. RENDERED WITH CARE • PDF with smooth scrolling and pinch-to-zoom • Markdown with typography that reads • Source code with precise syntax highlighting • JSON, XML, and YAML, pretty-printed • CSV and TSV, as readable tables • Excel spreadsheets (XLSX) • Word documents (DOCX) • ZIP archives, browsed inside • Plain text, logs, and scripts • x509 certificates BUILT FOR iPHONE AND iPAD • Open from any app via the iOS share sheet • Recent files, one tap away • Orientation-aware on iPad • Works offline. Always. NOTHING YOU DON'T NEED No sign-up. No subscription. No ads. No tracking. No cloud sync. No bloat. Just a clean surface for reading what you already have. Because simple is elegant.

Gwtar Viewer opens Gwtar archives — self-extracting single-file HTML that packs a web page with all of its images and styles into one .html file. Gwtar files do not work when opened directly in a browser: they need a server that answers Range requests, fetching just the parts of the file that are actually needed. Gwtar Viewer runs a local server on your device to provide exactly that, letting the archive's own rendering logic do the rest. Your files are never modified. It also works as a viewer for ordinary HTML files, not just Gwtar. ■ Features - Open and read Gwtar files (.html) - Files you open are kept as history cards with thumbnails for quick reopening - Page zoom, remembered per file - Light / dark themes, English / Japanese UI - One-tap deletion of site data stored by archives ■ Privacy Everything happens on your device. The only network traffic is between the app and its own local server. Nothing is ever sent or collected externally. ■ Open source Gwtar Viewer is open-source software under the 0BSD license. See the support URL. The Gwtar format was designed by Gwern Branwen (this app is an independent implementation).