# Gwtar Viewer

> Gwtar Viewer (iPhone/iPad app by Yasuhiro Yamada.)

- Source: https://appshunter.io/ios/app/gwtar-viewer/id6792750702 (this page in markdown: same URL + `.md`)
- Developer: [Yasuhiro Yamada](https://appshunter.io/developer/1503076203)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 14.0 · 8 MB
- Languages: English
- Released: 2026-07-25
- Data updated: 2026-07-28
- User reviews in markdown: https://appshunter.io/ios/app/gwtar-viewer/id6792750702/reviews.md

## What is Gwtar Viewer?

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).


## Version history (last 1 release)

### 1.0.0 — 2026-07-25

No release notes.

## More apps by Yasuhiro Yamada

- [Oshi Timer](https://appshunter.io/ios/app/oshi-timer/id1503076204)

All apps by Yasuhiro Yamada: https://appshunter.io/developer/1503076203

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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 2026-07-28.*