Supported Formats

AAC is the lossy codec that succeeded MP3 in the MPEG standards, and it sounds noticeably better at the same bitrate. A bare .aac file is a raw ADTS stream: the audio frames with nothing wrapped around them, which is why it carries no cover art or tags.

AVI is a multimedia container format introduced by Microsoft in 1992. It can contain both audio and video data in a file container that allows synchronous audio-with-video playback.

AVIF is an open image format that stores a still frame encoded with the AV1 video codec. It typically reaches a smaller file than JPEG or WebP at comparable quality, and supports HDR, wide colour gamut and an alpha channel. Encoding is slow compared to JPEG, which is why it is usually done ahead of time rather than on demand.

Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format. While not strictly a 'file', it's a common way to transmit files as text.

BMP is a raster graphics image file format used to store bitmap digital images, independently of the display device. It stores color data for each pixel without compression.

A CSV file is a delimited text file that uses a comma to separate values. Each line of the file is a data record. It is one of the most common formats for moving tabular data.

DOCX is an XML-based file format developed by Microsoft for Word processing documents. It is a modern, open standard that has replaced the older binary .doc format.

EPUB is an e-book file format that uses the ".epub" file extension. The term is short for electronic publication and is sometimes styled ePub. EPUB is supported by many e-readers, and compatible software is available for most smartphones, tablets, and computers.

FLAC is an audio coding format for lossless compression of digital audio. While file sizes are larger than MP3, it preserves exactly the original audio data.

GeoJSON is an open standard format designed for representing simple geographical features, along with their non-spatial attributes. It is based on JSON.

GIF is a bitmap image format that supports up to 8 bits per pixel. It is well-known for its ability to support simple animations, making it ubiquitous on the internet for short, looping video clips.

GPX is an XML schema designed as a common GPS data format for software applications. It can be used to describe waypoints, tracks, and routes.

HEIC is the file format name Apple has chosen for the new HEIF standard. It uses advanced compression algorithms to store images at half the file size of a JPEG while retaining better visual quality.

HTML is the standard markup language for documents designed to be displayed in a web browser. It defines the meaning and structure of web content.

The ICO file format is an image file format for computer icons in Microsoft Windows. ICO files contain one or more small images at multiple sizes and color depths, such that they may be scaled appropriately.

JPG (or JPEG) is a widely used compressed image format for containing digital images. It uses lossy compression, which means some image quality is lost to achieve significantly smaller file sizes.

JSON is an open standard file format and data interchange format that uses human-readable text to store and transmit data objects consisting of attribute-value pairs and arrays.

KML is an XML notation for expressing geographic annotation and visualization within two-dimensional maps and three-dimensional Earth browsers like Google Earth.

M4A is an audio-only file compressed using MPEG-4 technology. It provides better sound quality and smaller file sizes compared to MP3. Apple uses it heavily for DRM-free iTunes music.

Markdown is a lightweight markup language for creating formatted text using a plain-text editor. It is widely used for blogging, documentation, and formatting read-me files.

MKV is a free, open-source container format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is widely used for high-definition video.

MOV is a multimedia container file format developed by Apple. It is compatible with both Macintosh and Windows platforms and can contain multiple tracks storing different types of media data.

MP3 is a digital audio encoding format. It uses a form of lossy data compression to reduce file sizes significantly while sounding like a faithful reproduction of the uncompressed original audio to most listeners.

MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images. It allows streaming over the internet.

OGG is a free, open-standard container format maintained by the Xiph.Org Foundation. It frequently uses the Vorbis audio codec, which offers superior sound quality and smaller file sizes than MP3.

Opus is an open, royalty-free codec standardised by the IETF that covers everything from low-bitrate speech to full-range music in a single format. It beats both MP3 and AAC at low bitrates, which is why messaging apps, Discord and WebRTC calls all use it.

PDF is a file format developed by Adobe to present documents independently of application software, hardware, and operating systems. Each PDF file encapsulates a complete description of a fixed-layout flat document.

PNG is a popular raster graphics file format that supports lossless data compression. It was designed as an improved, non-patented replacement for Graphics Interchange Format (GIF). PNG files are notable for their ability to handle transparent backgrounds. Often processed with a PNG minifier to optimize file size for web use.

SVG is an XML-based vector image format for two-dimensional graphics. Unlike raster formats (like JPEG or PNG) which use pixels, SVGs use mathematical equations to draw shapes, allowing them to scale infinitely without losing quality.

TIFF is a computer file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers.

A TXT file is a standard text document that contains unformatted text. It is recognized by any text editing or word processing program and can also be processed by most other software programs.

WAV is an audio file format standard developed by Microsoft and IBM. It is the main format used on Windows systems for uncompressed, lossless audio.

WebM is an audiovisual media file format primarily intended to offer a royalty-free alternative to use in the HTML5 video tag. It is sponsored by Google and heavily used on the modern web.

WebP is a modern image format developed by Google that provides superior lossless and lossy compression for images on the web. WebP lossless images are 26% smaller in size compared to PNGs.

WMA is Microsoft's audio codec, stored in an ASF container. It shipped with Windows Media Player and was the default for CDs ripped on Windows through the 2000s, so it turns up throughout older music libraries. Support outside Windows has always been patchy and no browser plays it natively.

XLSX is an XML-based file format used by Microsoft Excel to store spreadsheet data, charts, macros, and formatting.

XML is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.

YAML is a human-readable data-serialization language. It is commonly used for configuration files and in applications where data is being stored or transmitted.