Universal File Opener & Editor

About Universal File Opener & Editor

Open, read, and edit PDF, Word, Excel, PowerPoint, and dozens of other file types, all fully offline. Universal File Opener has no INTERNET permission at all, so nothing you open can be uploaded, tracked, or sold. No ads. No account. No sign-in.

It is a document reader, file viewer, and editor in one, and it opens PDF, Word (DOC, DOCX), Excel (XLS, XLSX), PowerPoint (PPT, PPTX), OpenDocument (ODT, ODS, ODP), ZIP, RAR, 7Z, TAR, CSV, Markdown, EPUB, JSON, XML, source code, SQLite databases, images, audio, video, certificates, fonts, and unknown files as text or hex. Nearly every other file app asks for network access and runs ads. This one does neither, so your work never leaves your device.

PRIVATE BY DESIGN, NOT BY PROMISE
• No INTERNET permission, none at all. The app cannot phone home, so your documents physically cannot leave your phone.
• No ads, no account, no analytics, no tracking SDKs, no watermarks, and no video before your file opens.
• Free to try. One upgrade unlocks everything forever, with no subscription.
• Optional support diagnostics are exported only when you choose, and never include file contents, names, paths, hashes, clipboard text, or payment details.

A REAL EDITOR, NOT JUST A READER
• PDF editor: fill forms, sign, draw, add boxes and shapes in any color, type text (choose font, size, color), insert images, highlight, add notes, page numbers and watermarks, move, delete, insert and rotate pages, combine PDFs, split or extract pages, export pages as images, compress, crop, redact, flatten, edit properties, unlock password-protected PDFs, and password-protect a copy.
• Word and PowerPoint: edit paragraph text, formatting, fonts, colors, lists, styles, links, comments, footnotes, images, tables (including merge and split cells), headers and footers, page setup, slide order, speaker notes, shapes, symbols, and backgrounds, with find and replace, accept or reject tracked changes, and undo and redo.
• Excel editor: edit cells and formulas, use common functions, format cells, sort and filter, fill down and right, insert and delete rows and columns, merge cells, freeze panes, add sheets, comments, links, dropdowns, conditional formatting, charts, and find and replace.
• Text, code, CSV, TSV, hex, SQLite, and images: edit text and grids, patch bytes, add, update and delete database rows, crop, rotate, resize and compress images, draw, add text, and adjust color.
• Save as PDF: turn images, text, code, Markdown, CSV, spreadsheets, and Office or web documents into a PDF, and combine several images into one PDF.

All editing runs on your device. For writable files, changes save back through Android's file access system; for read-only shares, use Save As to make an editable copy.

WHAT YOU CAN OPEN
• PDF reader with page navigation, pinch zoom, search, highlighting, text copy, metadata, and outlines where available.
• Word, PowerPoint, Excel, and OpenDocument viewer showing document structure, tables, images, links, notes, comments, sheets, formulas, charts, and slide canvases.
• Markdown, HTML, EPUB, source code, JSON, XML, YAML, SQL, logs, and other text and data formats with search and syntax highlighting.
• Images with pan and zoom, audio and video playback, font previews, X.509 certificate details, and SQLite table browsing.
• ZIP, RAR (classic RAR4), 7Z, TAR, APK, JAR, GZ, BZ2, and XZ archive browsing and safe extraction.

A note on Office files: this is a progressively richer engine for reading, searching, and editing, not a clone of desktop Office. Modern Office support focuses on useful mobile preview and editing while preserving untouched package parts. Legacy DOC, XLS, and PPT files use basic readable-text extraction with clear conversion guidance.

HONEST FORMAT SUPPORT
RAR5, password-protected RAR, and unsupported formats such as CAB, ISO, DMG, LHA, and LZH say so clearly instead of pretending partial support. Unknown files still open as text or hex when possible.