BeauTyXT

BeauTyXT

BeauTyXT is a plain-text and Markdown reader and editor for Android, with a Material 3 Expressive interface.

Read a note, a reference document, or an assistant's Markdown output without reopening the app or conversation that produced it. Make changes when needed, then share the document on its own. Reading is a complete use case; editing remains a first-class capability.

Requires Android 17 / API 37. The interface is currently English-only.

Read, edit, and share

• Read Markdown with tables, task lists, alerts, footnotes, and a supported HTML subset. Supported TeX math and Mermaid diagrams render natively, without a browser or JavaScript.
• Move between rendered Markdown and source editing while keeping your place. Navigate long documents with Contents, document-wide Find, and Go to line.
• Keep Find and Replace above the document. Open Search options directly, browse Results with surrounding text, and review or exclude replacements before applying a batch. Undo replacement reverses the applied change.
• Edit with undo, redo, and automatic saving to compatible source files.
• Share through Android, QR codes, or NFC tags. Save generated QR images as lossless WebP or PNG.
• Preview and share or save a whole document or a selection from Send & export. Share comes first, with Save a copy underneath and visible QR code, NFC, Copy, and Print actions. Selected text includes a short excerpt, and PDFs show their page count and paper size. Preview and settings opens detailed review; PDFs use Preview and page settings. Each format explains what it preserves or changes. Save a copy exports the reviewed output; use the editor's Save to give an unsaved document its own file for further editing. Share PDFs directly, save them to a chosen provider, or open Android's print screen. Choose source or formatted output, paper size, margins, font and size, a filename header, and page numbers.

Files and privacy

Files stay with the storage provider you choose. Compatible files save automatically after edits. Files whose providers cannot support verified saving open view-only; Save as editable creates a compatible source without changing the original.

New documents and received text remain in memory until you choose Save. BeauTyXT keeps no app-private document copies, recent-file list, or recovery files. Sessions and undo history exist only in memory. Unsaved content is lost if its session closes or Android ends the app process.

BeauTyXT checks the source before and after saving and reports conflicts or uncertain writes. Storage providers do not universally support atomic writes: another app can still race a save, and an interrupted write can leave a source file incomplete.

The app has no Internet permission, account, or cloud service. It does not fetch document images or other remote resources. Your chosen storage provider may still sync files, and explicitly opening an external link hands it to another app. Keyboards receive a request not to use input for personalized learning, but BeauTyXT cannot enforce how an independent keyboard handles your text.

Supported content and limits

• Files must be UTF-8 plain text or Markdown, up to 256 MiB. Existing byte-order marks and untouched line endings are preserved.
• Markdown rendering accepts up to 16 MiB of source, with additional complexity limits. Images appear as alternative text; CSS, scripts, and unsupported HTML are not rendered. Unsupported content remains visible as source.
• Math and diagrams support a deliberate subset, not general TeX or Mermaid compatibility. Unsupported or oversized illustrations remain source with an explanation. See native illustrations.
• Direct text sharing between apps is limited to 128 KiB of UTF-8; sharing a saved file uses its existing provider location. QR transfers accept up to 1,536 UTF-8 bytes. Complete NFC messages are limited to 256 KiB, and writing also depends on the tag's capacity.
• PDFs provide selectable text and basic document structure, not full PDF/UA accessibility. Text extraction varies by reader. See vector printing.

Development and documentation

The interface uses Jetpack Compose. Rust implements the document engine and isolated import, export, Markdown, transfer, math, and diagram workers.

• Product direction: the app's purpose and scope, including its role alongside AI assistants.
• Architecture: storage, lifecycle, process boundaries, rendering, and detailed resource limits.
• Contributing: development conventions and dependency notices.
• Release process: toolchain, verification, reproducibility, and packaging.

License

BeauTyXT is licensed under the MIT License.