Kubik
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Any file, in the format you need

iPhone photos, PDFs, music and video. Drop a file — Kubik figures out what it is and converts it right in your browser.

Drop files here or choose them

You can also paste files with Ctrl+V

Files never leave your device

How it works

  1. Drop a fileEven a dozen at once
  2. Pick a formatKubik suggests the ones that fit
  3. DownloadOne by one or all in a ZIP

All supported formats

FormatExtensionsDescriptionConverts to
JPEG image.jpg, .jpeg, .jfifLossy raster format for photos. Small files, no transparency.
PNG image.pngLossless raster format with transparency. Good for screenshots, logos and graphics.
WebP image.webpModern web format by Google with lossy and lossless compression and transparency.
AVIF image.avifNext-generation image format based on AV1. Smaller files than JPEG and WebP at the same quality.
HEIC image.heic, .heifHigh-efficiency image format used by iPhone cameras.
SVG image.svgVector image format based on XML. Scales to any size without losing quality.
ICO image.icoIcon format for Windows and website favicons. Can hold several sizes in one file.—
BMP image.bmpUncompressed Windows bitmap. Simple but produces large files.
TIFF image.tif, .tiffRaster format for printing, scanning and archiving. Supports lossless compression and layers.
GIF image.gifRaster format limited to 256 colors that supports animation.
PDF document.pdfPortable document format that looks the same on any device. Used for documents and printing.
MP3 audio.mp3The most widespread lossy audio format. Plays on almost any device.
MP4 video.mp4, .m4vCommon video container, usually with H.264 video and AAC audio. Plays almost everywhere.
MOV video.mov, .qtApple QuickTime video container, the default for iPhone and Mac recordings.
WebM video.webmOpen web video container with VP8/VP9/AV1 video and Opus or Vorbis audio.
M4A audio.m4aAAC audio in an MP4 container. Default audio format for Apple devices and iTunes.
WAV audio.wavUncompressed audio. Maximum quality and compatibility, but large files.
OGG audio.ogg, .ogaOpen audio format with Vorbis compression. Common in games and Linux apps.
FLAC audio.flacLossless compression: the same quality as WAV in roughly half the size.
Opus audio.opusModern open codec: good quality at low bitrates. Used for voice messages and streaming.
MKV video.mkvOpen Matroska container: any video and audio codecs, several audio and subtitle tracks. Common for films and series.
AVI video.aviLegacy Microsoft video container from the 1990s, often with DivX or Xvid. Many phones and TVs no longer play it.
WMV video.wmvWindows Media Video in an ASF container. Played by Windows Media Player but rarely by phones and Macs.
FLV video.flvFlash Video: the format of early YouTube and Flash players. Modern browsers and phones do not play it.
3GP video.3gp, .3gpp, .3g2Video format of older mobile phones: small frame and low bitrate, often with AMR sound.
AAC audio.aacRaw AAC audio stream (ADTS) without an MP4 container. Comes from radio streams, recorders and video extraction.
WMA audio.wmaWindows Media Audio: Microsoft audio format for Windows Media Player. Apple devices and many players do not open it.
AMR audio.amrSpeech codec of mobile networks: voice recorders and voice messages of older phones. Mono, 8 kHz, very small files.
iPhone ringtone (M4R).m4rAAC audio in an MP4 container with the .m4r extension: the iPhone ringtone format, up to 40 seconds long.—
CSV table.csvPlain-text table with comma- or semicolon-separated values. Opens in Excel, Google Sheets and any text editor.
Excel spreadsheet (XLSX).xlsxMicrosoft Excel workbook format with sheets, formulas and formatting. Also opens in Google Sheets, Numbers and LibreOffice.
JSON data.jsonText data format of web APIs and configs: objects and arrays of values readable by any programming language.
XML data.xmlText format with tags and attributes for exchanging data between systems: exports, feeds and documents.
YAML data.yaml, .ymlReadable config format that uses indentation instead of brackets: Docker Compose, Kubernetes, CI and app settings.
Markdown text.md, .markdownLightweight text markup: headings, lists and links written with plain characters. READMEs, notes and docs.
HTML page.html, .htmThe language of web pages: opens in any browser and keeps headings, links, lists and tables.—
ZIP archive.zipThe most common archive format, built into Windows and macOS. Holds files and folders, usually compressed.—
RAR archive.rarArchive format from WinRAR with strong compression and multi-part archives.—
7z archive.7zOpen archive format from 7-Zip with high LZMA compression.—
TrueType font (TTF).ttfThe classic desktop font format from Apple and Microsoft. Installs on Windows, macOS and Linux and works in any office app.
OpenType font (OTF).otfA font format from Adobe and Microsoft, often with CFF outlines and rich typographic features. Installs on any modern system.
WOFF web font.woffA web font: the same TrueType or OpenType tables, each compressed with zlib. Every browser supports it.
WOFF2 web font.woff2The current web font format: Brotli makes files about 30% smaller than WOFF. All modern browsers support it.
SubRip subtitles (SRT).srtThe most common subtitle format: numbered cues with start and end times and plain text. Opened by almost every player, TV and video editor.
WebVTT subtitles (VTT).vttSubtitles for the web and HTML5 video: like SRT, but with a WEBVTT header, a dot before milliseconds and optional cue positions and styles.