Folio 1.0.38 — Windows portable preview

Folio is an open-source, local-first book and manga reader. This is a portable Windows preview built from commit 741dc69.

Install

Requires Windows 10 x64 or later.

1. Download Folio-1.0.38-windows-x64-portable.zip from Assets below.
2. Extract the ZIP completely to a folder you can write to.
3. Open Folio/Folio.exe. Keep Folio.exe, app/, and runtime/ together.

The Java runtime is included. You do not need to install Java or compile the app. The Windows executable is an unsigned preview.

Read your own books

Import a DRM-free EPUB or supported document, adjust the typography and theme, and keep your reading place, highlights, notes, and activity locally. Folio does not provide books or manga content. Optional cloud sync requires your own Firebase project.

Android is the primary platform and has additional features. Source extensions, offline narration, widgets, and reminders are Android features. Android preview downloads use a separate version series.

Verification and limits

The package was built with :desktopApp:createDistributable. The bundled runtime, referenced launcher dependencies, embedded EXE icon, and ZIP integrity were checked. The packaged shared-code JAR matches the fresh build. A native launch using a new, isolated library profile reached its first rendered frame.

This is a startup and packaging check, not broad Windows hardware or full reader testing. The package contains no personal library or account configuration. Use SHA256SUMS-windows.txt to verify the downloaded archive. Keep a backup of your library before updating.

This is a portable build rather than an installer. It does not register file associations or set up Start menu shortcuts. Linux, macOS, and iOS are not supported runtime targets.

Installation and FAQ · Report a bug · Source code

Known test-suite limitation

The full shared JVM suite completed with 1,204 passed, 31 failed, and 16 skipped tests on a clean Linux runner. Several failures are in corpus-dependent tests that need local book fixtures; other assertion and lifecycle failures still require investigation. This preview is not backed by a fully passing shared test suite. The Android build passed, and the Windows package passed its fresh build and isolated startup check.