How to open any file extension

Install on Android, run on PC, or inspect permissions with the free APK viewer.

Split APK + OBB bundle — how to install it and what's inside.

The universal archive format — browse, preview and extract it online.

WinRAR's compressed archive — open and extract it right in your browser.

Disc image, firmware, or raw data — identify what's inside before opening it.

View pages, jump around, and extract all the text — right in your browser.

Not a real format — find out what it actually is and rename it.

Python source code — view it highlighted, or actually run it in your browser.

View the photo and check whether it's leaking your GPS location — then strip it.

Find out what's really inside it — and whether it's safe to delete.

View every sheet of an Excel workbook and export to CSV — no Excel needed.

The iPhone photo format — preview, check metadata, and convert to JPG.

Validate it, pinpoint syntax errors, and explore it as a collapsible tree.

Preview it, check real technical details, and see how much smaller it is than JPG.

Mac disk image — see its real uncompressed size and partition table before opening it.

Decode a real PGP signature's algorithm, signer and date before you verify it.

See a Windows app package's real identity, capabilities and signature status before installing.

Not a real format — see what it actually does, verify one, or generate a real one.

DVD video — read its real resolution, audio tracks and duration without playing it.

Chrome's in-progress download — check whether it's actually complete before renaming.

Preview it, check hidden metadata and GPS data, and verify every chunk's checksum.

Read its real PE header — architecture, imports, exports and .NET status — safely, without running it.

Could be almost anything — identify a Registry hive, Java object, Minecraft NBT, torrent resume data and more.

AutoCAD drawing — find out exactly which AutoCAD release made it, straight from its own bytes.

Decode its real bencoded metadata — file list, trackers, and the true SHA-1 info hash.

Browse a disc image's real ISO 9660 file tree without mounting or extracting anything.

Preview it (animation included), see its real encoding and alpha channel, and convert it to JPG or PNG.

Preview it as a real table, auto-detect its true delimiter, and convert it to JSON.

iPhone photo edit file — see which edits it holds, and whether you can delete it.

DVD IFO backup or McAfee quarantine file — read titles, languages and running times.

Cue sheet for BIN images and FLAC albums — read, check, fix or create one.

AutoHotkey script — view it safely, see v1 or v2, and spot risky commands.

Chrome's save-in-progress swap file — see what's inside and recover the changes.

Android thumbnail-cache ID file — read the UUID and see if it's safe to delete.

Word document — read it without Word, see who wrote it, and spot macros or a password.

OpenDocument presentation — view the slides, text and images, or open it in PowerPoint.

Apple Pages document — see its preview, text and pictures on Windows or Android, no Mac needed.

Jupyter notebook — read the code, outputs and charts in your browser, no Python needed.

Protein structure, Visual Studio symbols or Palm ebook — find out which and view it.

HPGL plotter file — see the drawing in your browser and save it as SVG or PNG.

MDF/MDS disc image — read the track list, check the MDF and get a CUE or ISO.

AVCHD camcorder index — see which video to play and check the whole folder.

Open an SDOCX file in Samsung Notes, export it to PDF, and find practical options for Windows, Mac and iPhone.

Open an OXPS file with Windows XPS Viewer, install the optional feature, and print a PDF copy for other devices.

Open an RPMSG protected email using the original message and authorized account. Fix Outlook, Gmail and permission problems.

Open an ABM album with the application that created it, such as ArcSoft PhotoStudio or PhotoImpression for a confirmed ArcSoft album.

Open an ABW document with AbiWord or LibreOffice Writer.

Open an ASC file in a text editor first to identify its contents.

Open an AVI video with VLC on a supported device.

Open a BAK backup with the application that created it.

A CTG found on a Canon camera card is normally a catalog or control file, not a photograph to open.

For an OMA DRM-protected DCF, use the original compatible device or application with valid rights for the content.

For an AutoCAD DWL file, open the associated DWG drawing instead.

Open an ENC file with the application or decoding method that created it.

Open a GBA game image with a compatible Game Boy Advance emulator, such as mGBA.

Open a NES game image with a compatible Nintendo Entertainment System emulator, such as Mesen.

Identify an MDF before opening it: a disc image is mounted with compatible image software, while a SQL Server data file is attached to a SQL Server instance.

Open an MKV video in VLC or another Matroska-compatible player.

Open an OGG media file in VLC or another player supporting its encoded streams.

Open a PHP file in a text or code editor to read its source.

Open a T file in a text editor to identify its language and project.

For a Windows Trace Message Format TMF, open it in a text editor to inspect formatting metadata, or use it with Tracefmt or TraceView to decode matching trace messages.

An unknown extension does not identify one file format.

Open an XLS workbook with Microsoft Excel or LibreOffice Calc.

Open a trusted Windows EXE by launching it on a compatible Windows system.

For a macOS APP bundle, open it on a supported Mac through Finder.

Open a trusted MSI on Windows with Windows Installer.

Open a P7M with a CMS/PKCS#7 or CAdES-compatible signature application.

Open a GPG or PGP encrypted file with GnuPG or a compatible OpenPGP application and the required private key or passphrase.

An OBB is additional data used by a matching Android app, not a standalone application to install.

An AAB is an Android publishing bundle, not a directly installable APK.

An IPA packages an iOS or iPadOS application.

Open a INI file in a plain-text editor to inspect it, then use the originating application’s documented settings format before making changes.

Open a CFG file in a plain-text editor to inspect it, then use the originating application’s documented settings format before making changes.

Open or manage a CACHE through the application that created it.

Open an AAC audio file in a player supporting its AAC stream format, such as VLC.

Open a 3GP video with a compatible media player such as VLC.

Open a DRM-free AZW3 ebook with a compatible reader such as calibre’s ebook viewer.

Treat a WXDOWNLOAD as a download artifact until you have identified the application and original file behind it.

You cannot turn an Android APK into a native Windows EXE by renaming it or using a general file converter.

A CRDOWNLOAD is an unfinished Chrome download, not a video format to transcode.

Putting a Windows EXE into a DMG does not make it a Mac application.

An APK is an Android application package containing code, a manifest and resources.

When an APK will not install, first read the actual error and check device compatibility, package completeness and signing identity.

To create an APK, build an Android source project with Android Studio or its Gradle build system.

To make a PNG background transparent, edit the image so its unwanted background pixels are transparent, then export a PNG with an alpha channel.