OpenFile vs OneOpen

Open, preview, and explore over 100 file formats — right on your iPhone or iPad. No uploads, no account, no setup. Just tap a file and see it instantly. RICH FORMAT PREVIEWS Every format gets a purpose-built viewer: • 3D Models — Rotate and zoom glTF, OBJ, STL, PLY, and more in an interactive viewer • Code — Syntax highlighting for Swift, Python, JavaScript, TypeScript, Rust, Go, and 20+ languages • Databases — Browse SQLite tables, run SQL queries, and explore schema • Documents — Read PDFs, EPUB books, Word, Excel, and PowerPoint files • Archives — Explore ZIP, RAR, 7-Zip, TAR, and ISO contents without extracting • Audio & Video — Play MP3, WAV, FLAC, MP4, MOV, MKV, and more • Data Formats — View JSON, YAML, XML, CSV, Parquet, and Jupyter notebooks • Geospatial — Visualize GeoJSON, GPX, and KML on interactive maps • Fonts — Preview OpenType and TrueType font files • Images — View JPEG, PNG, GIF, HEIC, WebP, PSD, and SVG BUILT-IN DEVELOPER TOOLS Go beyond viewing with 10 built-in tools: • Hex Inspector — View raw file bytes • Compare Files — Side-by-side diff • Checksum — Calculate MD5, SHA-1, and SHA-256 hashes • Extract Text — Pull text from any document • Export as PDF — Convert any preview to PDF • Base64 — Encode and decode • Pretty Print — Format JSON, XML, HTML, and CSS • Text Statistics — Word count, line count, reading time • File Identification — Detect the true file type from magic bytes PRIVACY FIRST All processing happens on your device. Files are never uploaded. No account is needed. No tracking. WORKS WITH YOUR WORKFLOW • Open files directly from the Files app or Share Sheet • Browse iCloud Drive • Track recently opened files and pin your favorites • Search your file history Works on iPhone and iPad. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

OneOpen is a multi-format file viewer for iPhone and iPad. Open documents, web pages, CAD drawings, 3D models and archives from Files, Mail and apps that support document sharing. HTML and Markdown Preview HTML, HTM and XHTML pages. Read Markdown / MD notes with headings, a table of contents, tables, code fences, task lists, footnotes and reference links. ZIP websites retain local images, styles and relative resources. Markdown in packages can display supported local images. Ordinary HTML allows restricted HTTPS/WSS networking by default, with offline and Safe Preview options. Markdown does not run scripts or load remote images. CAD drawings and 3D models (Advanced) • Pan, zoom and toggle layers in supported DWG/DXF 2D model-space drawings. • Rotate STEP/STP, IGES/IGS, BREP/BRP, STL, OBJ and PLY models, including PLY vertex colors and point clouds. • ZIP a complete OBJ model folder to load supported MTL materials, PNG/JPEG textures, normals, transparency and groups. A standalone OBJ shows geometry without reading private neighboring files. • Preview supported static GLB / glTF 2.0 geometry, nodes, basic materials and PNG/JPEG textures. Model ZIPs retain relative resources. JSON and model information have separate views. • USDZ starts in object view; choose AR when needed. • Included models and engineering drawings demonstrate supported features. Everyday viewing is free Read PDF, Office/iWork, images, audio/video, JSON, XML, YAML, CSV, code and text. PDF supports continuous reading, zoom, search and page controls that hide while scrolling. Edit supported text in an independent working copy. Archives and EPUB Browse ZIP, 7Z, RAR, TAR, GZ, BZ2, XZ and supported TAR combinations. Open or share supported entries and save extracted files to Files. ZIP and EPUB remain free; other archive formats require Advanced Access. EPUB follows the declared chapter order, with a table of contents, previous/next controls, current-chapter search and reading settings. Pages stay offline. A chapter error keeps navigation available. DRM, media overlays, annotations and whole-book search are unsupported. Email, certificates and information Decode EML headers, body text, common character encodings and attachment filenames. Open or share readable attachments independently. HTML email becomes text without loading remote content. Decryption, signature verification and TNEF extraction are not provided. Inspect public CER, DER, CRT and PEM certificate subjects, issuers, validity, algorithms, public keys, usages and SHA-256 fingerprints. Certificates are never installed and device trust is not evaluated. File Information includes PDF metadata, image/camera properties, media tracks, text encoding/line counts and archive summaries. Open from other apps Skippable onboarding uses real iOS screenshots to explain More, Edit and favorite ordering in the share sheet. Revisit it in Settings. Categories, Recents and widgets help you return to files. Advanced Access and compatibility An annual membership or a one-time lifetime purchase unlocks the same specialized features. Check format details before purchasing. DWG supports selected 2D model-space content; DXF supports text files. CAD editing, engineering measurement, native SolidWorks and full external references are unsupported. Compressed glTF geometry, skins and active morphs require conversion. Animation is static; advanced materials may be approximate. ZIP complete model folders, or use self-contained GLB for single-file sharing. Supported AES/ZipCrypto ZIPs prompt for passwords; unsupported encryption/compression, multipart and RAR3 solid are excluded. Native previews depend on iOS codecs/variants. Privacy No account, ads, analytics or document uploads. Non-HTML previews stay offline. HTML and ZIP websites may run JavaScript and connect over HTTPS/WSS in an isolated environment; offline and Safe Preview modes are available. Terms: https://oneapps.studio/terms Privacy: https://oneapps.studio/privacy