File Viewer
Preview Office, PDF, CAD and more in the browser
File Viewer launched on July 14, 2026 with 7 votes, #2,664 of 24,623 launches that month and more than 90% of that year's launches.
What it does
Uploading a private DOCX just to preview it is awful. File Viewer keeps the work in the browser. It maps 206 extensions to 24 lazy preview pipelines for Office, PDF/OFD, CAD, archives, email, diagrams, 3D, media and data. Use it with plain JavaScript, Web Components, React, Vue, Svelte or jQuery. Workers, WASM, fonts and other assets can stay on your own server. It is Apache-2.0. Office fidelity and huge files are still the hard parts.
File Viewer by Flyfish is a browser-native, offline-first preview component. It routes 244 registered extensions (221 stable, 23 experimental) through 34 lazy preview pipelines and ships 84 npm targets.
File Viewer is an offline-first, self-hosted file preview component ecosystem for business systems. It supports Office, PDF, OFD, Typst, XMind, CAD, EDA, archives, email, media, code, 3D, geospatial files, and more through 84 npm targets, 244 registered extensions, and 34 preview pipelines; 221 extensions are stable and 23 are experimental. Binary PPT and PPTX use isolated browser-native paths. The Full asset contract continues from 2.1.30. Vite publishes packaged assets with copyAssets:true; non-Vite builds run the included CLI once; complete web-full dist needs no copy step. Key links: Live demo , Documentation , GitHub repository , npm packages , v3.0.0 Releasefrom file-viewer.app
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