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Extensions 
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DjVu Viewer and Reader
DjVu Viewer, Reader is an app which is designed specifically to open and view the contents of DjVu files directly in your browser.
Webarchive Viewer and Convert to PDF
View a Webarchive file without having Apple Mac, Safari installed on the machine. Convert your Webarchive files to PDF/Zipped HTML.
MDB, ACCDB Viewer and Reader
This MDB, ACCDB Viewer allows you to view, search through a Access Database file without having Access installed on the machine.
DOC, DOCX, PPT File Viewer
This viewer is a tool that allows you to view DOC, DOCX, PPT, PPTX, XLS, XLSX directly in your Drive.
Cloud HWP Viewer
This HWP Viewer allows you to view a HWP file. You can open a HWP file to read from your computer or your Google Drive.
MOBI Viewer and Reader
View and read directly MOBI books in your browser. You can quickly open and read MOBI files without any special software.
TIF, TIFF Viewer with Drive
This app allows you to view multi-single page color TIFF, various image files. You can open TIFF files from Google Drive directly.
XLS Viewer, Editor
Lets you view and edit XLS files without leaving your browser. The supported file formats are spreadsheets, xls, xlsx, csv, sxc.
Local Image File Viewer
Next and previous buttons for viewing images in local file URLs to browse folders
Visio Viewer Free Online
Free Online View Visio VSD, VSDX, VSX, VTX, VDX, VSSX, VSTX, VSDM, VSSM & VSTM files(support mac,windows,ios,android)
UnRAR and RAR Viewer
Extract rar files with ease! It helps you to extract rar files (like WinRAR) and view the files easily.
eBook Viewer and Converter
eBook(azw3, fb2, lit, lrf, mobi, pdb), CHM file viewer & converter with Google Drive. Convert text file to ePub format.
Embroidery Viewer and Converter
View embroidery files including pes, dst, exp, jef, vp3, u01, pec.. as well as convert a embroidery file to multiple formats.
XML, JSON Viewer with Drive
View the structure of XML, JSON files. This XML, JSON Viewer is a simple and powerful, very useful program for XML viewing.
swagger-viewer
Shows swagger yaml/json rendered by Swagger-UI.
This extension replace swagger code into preview html in GitHub.
Document Viewer for Drive
This viewer lets you view document files (doc, xls, ppt, pdf, ai, psd, dxf, ps, zip, rar...) online without leaving your browser.
TeX, LaTex Viewer and Editor
Free LaTeX viewer, editor for your browser. It allows you to create and manage LaTeX file directly on browser and generate a PDF.
PDF FlipBook / Viewer : 3D
DearFlip - stunning 3D PDF Flipbook Viewer for presentation & reading. Also available as WordPress Flipbook & jQuery FlipBook Plugin
VCF, vCard Viewer and Print
This viewer allows you to view and print VCF (vCard) files, as well as convert a VCF file to CSV spreadsheet formats.
EXE/DLL PE Viewer and Editor
This app lets you open, view and edit a variety of different 32 bit Windows executable file types such as EXE, DLL and ActiveX.
3D STL, OBJ Viewer with Drive
3D STL, OBJ Viewer is an app for viewing the contents of Stereo Lithography files. You can open a STL, OBJ file to view.
OpenOffice Viewer and Converter
This app makes OpenOffice, Office, DOC, XLS, PPT, and Image files viewable in a web browser using OpenOffice. Convert Docs to PDF.
Exact Time Viewer for Instagram
Shows the exact time an Instagram photo or video was posted, rather than the date, or some time ago.
CHM, HLP Viewer and Extractor
This app allows you to view a CHM, HLP file without having Windows installed. Convert CHM, HLP files to Zipped HTML/RTF format.
Exif Meta Viewer With Drive
Exif Viewer is a tool that shows the Exif, Meta info of your pictures, docs. Extracts and displays the Exif, IPTC metadata.
Ghostify - Instagram Story Viewer
Ghostify helps you view Instagram stories without a trace (The story owner won't know you saw their story)
Send to Exif Viewer
This extension adds an element to the contextual menu to open images in a metadata (EXIF) viewer.
MPP Viewer for Drive
View mpp files online without the need to install MS Project. It is a fast and light weight app that reads the MPP.
HAR/JSON viewer
Visualizes HTTP Archive (HAR) files opened locally or online. Also features JSON tree view for HAR and any structured JSON files.
GeoJSON Map Viewer with Drive
Allows you to validate a GeoJSON and display it on a Google map. You can open GeoJSON files from your computer, Google Drive.