Supported formats

File formats for Android.

Find your extension, available tools and format limitations.

No app yet? Open a file in your browser. Free, nothing uploaded, no account.

PDF document

Open PDF files in your browser, on Android or on Windows. Read, search and print for free. Fill in and sign PDFs on Android.

Features and limits →.rar

RAR archive

Opens in UFO

Open and extract RAR archives on Android for free, offline, or in your browser on any computer. Enter a password when the archive needs one.

Features and limits →.7z

7-Zip archive

Opens in UFO

Open and extract 7Z archives on Android for free, offline, or right in your browser. Browse every file first and enter a password when needed.

Features and limits →.zip

ZIP archive

Opens in UFO

Open ZIP files on Android, Windows or online. Browse and extract supported entries for free in the apps, with no upload required.

Features and limits →.heic · .heif

HEIC / HEIF photo

Opens in UFO

Open iPhone HEIC photos on Android for free, offline, or right in your browser on any computer. Save a JPEG or PNG copy without uploading.

Features and limits →.avif

AVIF image

Opens in UFO

Open AVIF images in your browser, or on Android 12 and later, where the app saves PNG or JPEG copies offline. Free, nothing uploaded.

Features and limits →.webp

WebP image

Opens in UFO

Open still and animated WebP images in your browser or on Android, and save a PNG or JPEG copy. Free, nothing uploaded.

Features and limits →.svg · .svgz

SVG vector image

Opens in UFO

View SVG images in your browser or on Android, zoom in, and read the XML source. Scripts inside never run. Free, nothing uploaded.

Features and limits →.xps · .oxps

XPS document

Opens in UFO

Read XPS and OpenXPS documents in your browser or on Android. Search and copy text, or save a PDF copy. Free.

Features and limits →.epub

EPUB ebook

Opens in UFO

Read EPUB books in your browser, on Android or on Windows. Free, offline in the apps, and your place is saved. No account needed.

Features and limits →.docx · .docm · .dotx

Word document

Opens in UFO

Open DOCX files in your browser, on Android or on Windows. Reading is free and nothing is uploaded. Edit and save in the apps with Pro.

Features and limits →.xlsx · .xlsm · .xltx

Excel workbook

Opens in UFO

Open Excel XLSX files in your browser, on Android or on Windows. Browse every sheet for free; edit cells in the apps.

Features and limits →.pptx · .pptm · .ppsx · .potx

PowerPoint presentation

Opens in UFO

Open PowerPoint files in your browser, on Android or on Windows. Read slides and speaker notes, or present full screen. Free.

Features and limits →.odt · .ott

OpenDocument text

Opens in UFO

Open ODT documents in your browser, on Android or on Windows. Reading is free and nothing is uploaded. Edit and save in the apps with Pro.

Features and limits →.odp · .otp

OpenDocument presentation

Opens in UFO

Open ODP presentations in your browser, on Android or on Windows. Read and present for free; the apps also work offline.

Features and limits →.ods · .ots

OpenDocument spreadsheet

Opens in UFO

Open ODS spreadsheets on Android or Windows and browse every sheet free and offline, or read their text in your browser.

Features and limits →.csv · .tsv

CSV / TSV data

Opens in UFO

Open CSV tables on Android, Windows or online. Edit supported cells and save text files free in the apps, with no upload required.

Features and limits →.md · .markdown · .mdown

Markdown document

Opens in UFO

Read and edit Markdown files on Android for free, offline. Switch between the formatted preview and source, then save changes or print a PDF.

Features and limits →.sqlite · .sqlite3 · .db · .db3

SQLite database

Opens in UFO

Open SQLite databases on Android for free, offline. Browse tables, copy values and run supported read-only queries. Pro saves eligible row edits.

Features and limits →.vcf

vCard contacts

Opens in UFO

Read VCF contact files on Android, Windows or online. Inspect names, phone numbers and email addresses for free in the apps, offline.

Features and limits →.ics · .vcs

Calendar file

Opens in UFO

Read ICS calendar files on Android, Windows or online. Check event times, locations and recurrence for free in the apps, offline.

Features and limits →.eml

Saved email

Opens in UFO

Read EML emails on Android for free, offline, or in your browser: see the message, the real sender and every attachment.

Features and limits →.woff

WOFF web font

Opens in UFO

Convert a WOFF 1.0 font to the TTF or OTF inside it on Android or Windows with Pro. Preview it free in the apps or your browser. Nothing is uploaded.

Features and limits →.qoi

QOI image

Opens in UFO

Open QOI images on Android for free, offline. Edit supported images or convert a copy for sharing. QOI uses lossless image compression.

Features and limits →.tif · .tiff

TIFF image

Opens in UFO

Open TIFF scans in your browser or on Android and save a PNG or PDF copy. Page through multi-page scans in the browser. Free, nothing uploaded.

Features and limits →.mkv

MKV video

Opens in UFO

Play MKV videos in your browser, on Android or on Windows. In the apps, switch audio and subtitle tracks or add a subtitle file. Free.

Features and limits →.webm

WebM video

Opens in UFO

Play WebM videos in your browser, on Android or on Windows, and save an MP4 copy for apps that refuse WebM. Free, and nothing is uploaded.

Features and limits →.mp3

MP3 audio

Opens in UFO

Play MP3 audio in your browser, on Android or on Windows. Free, offline in the apps, with trimming on Android.

Features and limits →.mp4 · .m4v

MP4 video

Opens in UFO

Play MP4 videos in your browser, on Android or on Windows. Free, offline in the apps, and nothing is uploaded.

Features and limits →.mov

QuickTime movie

Opens in UFO

Play MOV videos from an iPhone on Android, on Windows or in your browser, and save an MP4 copy that plays anywhere. Free, nothing uploaded.

Features and limits →.gif

Animated GIF

Opens in UFO

Play animated GIFs in your browser or on Android. In the app, step through frames, reverse the animation or change its speed. Free.

Features and limits →.jpg · .jpeg

JPEG photo

Opens in UFO

Open JPG photos on Android, Windows or online. Viewing is free; the apps work offline. Edit supported photos in the apps without uploading them.

Features and limits →.jfif

JFIF image

Opens in UFO

A .jfif file is an ordinary JPEG photo. Open it on Android, on Windows or in your browser and save a .jpg copy. Free, and nothing is uploaded.

Features and limits →.png

PNG image

Opens in UFO

Open PNG images on Android, Windows or online. Viewing is free; the apps work offline. Crop, resize or adjust supported images in the apps.

Features and limits →.json

JSON data

Opens in UFO

Read and edit JSON files on Android for free, offline. Inspect the structure or use the text editor to change values and save a supported file.

Features and limits →.xml · .yaml · .yml · .toml

Config files

Opens in UFO

Read and edit XML, YAML, TOML and INI files in your browser, on Android or on Windows. Free, with nothing uploaded.

Features and limits →.doc

Legacy Word document

Opens in UFO

Read old Word .DOC files in your browser or on Android, and save a DOCX copy of the text. Free, and nothing is uploaded.

Features and limits →.xls

Legacy Excel workbook

Opens in UFO

Read XLS spreadsheets on Android, Windows or online. Opening is free, and the apps work offline. XLS is read-only in the apps.

Features and limits →.ppt

Legacy PowerPoint presentation

Opens in UFO

Read legacy PPT slide text on Android for free, offline. Create a text-only PPTX copy for editing; the original layout, pictures and charts are omitted.

Features and limits →.pem · .crt · .cer · .der

Certificates & keys

Opens in UFO

Read PEM, CRT, CER and DER certificates field by field on Android and Windows, offline, or see the PEM text in your browser. Free.

Features and limits →.iso · .cab · .dmg · .lha

ISO & CAB archives

Opens in UFO

Browse and extract the files inside an ISO disc image on Android or in your browser. Free, offline in the app, and nothing is uploaded.

Features and limits →.tar · .gz · .tgz · .bz2

TAR / GZ archive

Opens in UFO

Open and extract TAR.GZ archives in your browser, on Android or on Windows. Browse every file before extracting. Free.

Features and limits →.flac · .mka

FLAC & MKA audio

Opens in UFO

Play FLAC audio in your browser, on Android or on Windows. Free, offline in the apps, with playback speed and resume.

Features and limits →.amr

AMR voice recording

Opens in UFO

Play AMR voice recordings on Android for free, offline. Seek, change the playback speed and repeat, with nothing uploaded.

Features and limits →.ico · .cur

ICO & CUR icons

Opens in UFO

View ICO and CUR icons in your browser, on Android or on Windows. On Android, save every size inside as its own image. Free, nothing uploaded.

Features and limits →.tga

TGA image

Opens in UFO

View TGA images on Android for free, offline. Edit supported files or convert a copy to PNG or JPEG on your device, with no upload required.

Features and limits →.pcx

PCX image

Opens in UFO

View PCX images on Android for free, offline, and convert a copy to PNG or JPEG for sharing. Nothing is uploaded.

Features and limits →.hdr · .pfm

HDR & PFM images

Opens in UFO

View HDR and PFM images on Android for free, offline, and convert a copy to PNG or JPEG for sharing. Nothing is uploaded.

Features and limits →.ppm · .pgm · .pbm · .pnm

Netpbm images

Opens in UFO

View supported PPM, PGM and PBM images on Android for free, offline. Inspect an image or convert a supported copy without uploading it.

Features and limits →.xbm · .xpm · .wbmp

XBM, XPM & WBMP

Opens in UFO

View XBM, XPM and WBMP images on Android for free, offline. Convert supported files to a common image format on your device.

Features and limits →.rtf

RTF document

Opens in UFO

Read RTF documents in your browser or on Android. Search and copy text, or print a PDF. Free, and nothing is uploaded.

Features and limits →.log

Log files

Opens in UFO

Read and search log files in your browser or on Android. Free, and the file never leaves your device.

Features and limits →.html · .htm · .xhtml

HTML page

Opens in UFO

Read saved web pages in your browser, on Android or on Windows, safely: no scripts run and nothing loads from the internet. Free.

Features and limits →.apk · .jar · .ipa · .appx

App packages (APK, JAR, IPA)

Opens in UFO

Look inside an APK in your browser or on Android: browse the manifest, resources and libraries, and extract files. Free, nothing uploaded.

Features and limits →.ttf · .otf · .ttc · .otc

Fonts (TTF, OTF, TTC)

Opens in UFO

Preview TTF and OTF fonts on Android for free, offline. Type your own sample text, see every glyph and read the font details.

Features and limits →.m4a · .aac

M4A / AAC audio

Opens in UFO

Play M4A recordings in your browser, on Android or on Windows. Trim a recording on Android and save a new copy for free.

Features and limits →.avi · .flv

AVI & legacy video

Opens in UFO

Play AVI videos offline on Android or Windows for free. If one will not play, see in your browser which codecs it uses. Nothing is uploaded.

Features and limits →.3gp

3GP phone video

Opens in UFO

Play 3GP videos from older phones offline on Android or Windows, free, and save an MP4 copy that plays on any device.

Features and limits →.bmp

BMP bitmap

Opens in UFO

Open BMP images on Android, Windows or online. Viewing is free; the apps work offline. Edit or convert supported images in the apps.

Features and limits →.plist

Property list (.plist)

Opens in UFO

Read and edit XML property lists in your browser or on Android. Free, offline in the app, and nothing is uploaded.

Features and limits →.py · .js · .ts · .java

Source code

Opens in UFO

Read and edit source code in your browser, on Android or on Windows, with syntax highlighting. Free, offline in the apps, nothing uploaded.

Features and limits →.pages · .numbers

Apple iWork (Pages, Numbers, Keynote)

Opens in UFO

Read Apple Pages and Numbers files on Android and Windows for free, offline. Pages shows the saved PDF preview or its text; Numbers shows its tables.

Features and limits →.bin · .bak · .tmp

Unknown files (.bin, .dat, no extension)

Limited support

Find out what a .BIN or .DAT file really is. UFO checks the contents on Android for free, offline, then shows any readable text.

Features and limits →.dat

DAT data file

Limited support

Got winmail.dat instead of attachments? Open it here to read the email and save every file inside, with nothing uploaded. Other .dat files too.

Features and limits →.mobi · .prc · .azw

MOBI Kindle ebook

Opens in UFO

Read MOBI books on Android or Windows for free, offline. Search the text, change the reading size and pick up where you left off.

Features and limits →.txt · .text

Plain text (.txt)

Opens in UFO

Read and edit TXT files on Android, Windows or online. Supported text edits save free in the apps, offline, with find and replace, undo and redo.

Features and limits →.opus · .ogg

Opus / OGG audio

Opens in UFO

Play Opus and OGG audio, including exported voice notes, in your browser or on Android. Free, with playback speed and resume.

Features and limits →.wav

WAV audio

Opens in UFO

Play WAV audio in your browser, on Android or on Windows. Free, offline in the apps, with playback speed, seeking and repeat.

Features and limits →.cbz · .cbr · .cb7

Comic book archives (CBZ, CBR, CB7)

Opens in UFO

Read CBZ and CBR comics in your browser or on Android: flip through pages, zoom in and save images. Free, offline in the app.

Features and limits →.pkpass

Apple Wallet pass (.pkpass)

Opens in UFO

Look inside a .PKPASS Apple Wallet pass on Android for free, offline: read the pass details in pass.json and save its images.

Features and limits →.srt · .vtt · .ass · .ssa

Subtitles and captions (SRT, VTT, SSA, ASS)

Opens in UFO

Read an SRT file on Android, or show it on your video: open the video in UFO, tap the subtitles button, then Add subtitle file. Free and offline.

Features and limits →.msg

Outlook message (.msg)

Opens in UFO

Open Outlook .MSG emails in your browser: read the message and headers and list every attachment, without Outlook. Free, nothing uploaded.

Features and limits →.djvu · .djv

DjVu document

Opens in UFO

Read DjVu scanned books on Android and Windows for free, offline. Pages, outlines and links open, with PDF, PNG and text copies.

Features and limits →.wmv · .wma

WMV / WMA (Windows Media)

Not supported

Play WMV and WMA in VLC on Android or a computer, or convert a copy to MP4 or MP3. Our apps and the browser opener do not play Windows Media files.

Features and limits →.jxl

JPEG XL image

Not supported

View JPEG XL (.JXL) here where your browser decodes it, or use Fossify Gallery on Android. Our Android and Windows apps do not decode JPEG XL.

Features and limits →.mht · .mhtml

Saved web page (MHTML)

Opens in UFO

Read MHT and MHTML saved pages on Android for free, offline. Open files up to 4 MiB with stored images and styles. Scripts and remote requests are blocked.

Features and limits →.gdoc · .gsheet · .gslides

Google Drive pointer

Identified only

A .GDOC file is a shortcut to a Google Docs document, not the document itself. Open its link, or export a DOCX or PDF to read it offline.

Features and limits →.psd · .psb

Photoshop document

Opens in UFO

View the flattened picture in a PSD or PSB on Android or Windows, or edit layers in Photoshop, GIMP or Photopea. Learn why some previews are missing.

Features and limits →.ai

Illustrator artwork

Opens in UFO

View the PDF saved inside an AI file on Android or Windows. Edit the original in Illustrator. Older PostScript files need a different route.

Features and limits →.dng · .cr2 · .cr3 · .nef

Camera RAW photo

Opens in UFO

Preview the JPEG inside a camera RAW file on Android or Windows. Use Lightroom or darktable to develop sensor data and adjust exposure or white balance.

Features and limits →.eps

Encapsulated PostScript

Opens in UFO

View an EPS preview on Android or Windows, or open the artwork in Illustrator or Inkscape. Learn why a preview can look blurry or be missing.

Features and limits →.cdr

CorelDRAW drawing

Opens in UFO

View a CorelDRAW X4 or later thumbnail on Android or Windows. Open the full CDR drawing in CorelDRAW or import compatible files into Inkscape.

Features and limits →.mbox

Email mailbox

Opens in UFO

Read MBOX emails offline on Android or Windows, including Google Takeout exports. Import a complete mailbox into Thunderbird or Apple Mail.

Features and limits →.pst · .ost

Outlook data file

Opens in UFO

Read an Outlook PST or OST on Android or Windows without Outlook: folders, messages and attachments, offline and read only.

Features and limits →.pub

Publisher publication

Opens in UFO

Open a Microsoft Publisher PUB file on Android or Windows without Publisher: pages, text boxes and pictures drawn as saved. Read only.

Features and limits →.vsdx · .vsdm · .vstx · .vstm

Visio diagram

Opens in UFO

Open a Visio VSDX or VSD diagram on Android or Windows without Visio: pages, shapes and text drawn as saved. Read only.

Features and limits →.dwg · .dxf

CAD drawing

Opens in UFO

Open a DXF drawing on Android or Windows with lines, text and layers, or see a DWG's saved preview picture. Free to view.

Features and limits →.stl · .obj · .3mf

3D model

Opens in UFO

Open an STL, OBJ or 3MF 3D model on Android or Windows: turn it, measure it and check it is watertight. Viewing is free.

Features and limits →.kml · .kmz · .gpx

Map file

Opens in UFO

Open a KML, KMZ or GPX map file on Android, Windows or online. Places, routes and tracks are drawn offline with their attributes.

Features and limits →.chm

Windows help book

Opens in UFO

Open a CHM help book on Android or Windows with its contents and search, even when Windows shows blank pages. Read only.

Features and limits →.hwp · .hwpx

Hangul document

Opens in UFO

Open a Hangul HWP or HWPX document on Android or Windows without Hancom Office. Text, tables and page size, read only.

Features and limits →.xlsb

Excel Binary Workbook

Opens in UFO

Open an XLSB Excel Binary Workbook on Android or Windows without Excel: sheets and stored results, plus a values-only XLSX copy.

Features and limits →.one · .onetoc2

OneNote section

Opens in UFO

Open a OneNote .one section on Android or Windows without OneNote or an account: text, lists, tables and pictures as pages.

Features and limits →

Entries describe Android 4.0. The app identifies 580 file extensions in 108 families and opens 577 of them; DMG, ORC and USDZ are identified but not opened. Windows support is listed separately.