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File Extensions

Browse file extensions by category or letter. Learn what each file type is used for and find software that can open, view, edit, or convert it.

5
Indexed file extensions

Find the right information for any file extension

Use this directory to look up file formats, understand what files are used for, and find compatible applications for Windows, macOS, Linux, mobile, and online tools.

Search by extension Enter extensions like PDF, APK, DAT, HEIC, ZIP, or DOCX.
Browse categories Filter by documents, images, videos, archives, data, and more.
Open files safely Check file sources and use trusted software before opening unknown files.

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5 extensions
Image Letter: A Clear all
.AI'

Adobe Illustrator Artwork

The .ai file extension is primarily associated with Adobe Illustrator, a professional vector graphics editor. AI files store vector-ba…

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.ANIMATED PNG

Animated Portable Network Graphics

Animated Portable Network Graphics (APNG) is a file format that extends the Portable Network Graphics (PNG) format to support animated…

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.APNG

Animated Portable Network Graphics

APNG (Animated Portable Network Graphics) is a file format that extends the PNG (Portable Network Graphics) specification to allow for…

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.ARW

Sony Alpha Raw

ARW files are raw image files created by Sony digital cameras. They contain minimally processed data directly from the camera's sensor…

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.AVIF

AV1 Image File Format

AVIF (AV1 Image File Format) is a modern image format that leverages the AV1 video codec for superior compression and image quality co…

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Frequently Asked Questions

Everything you need to know about file extensions

You can search by entering a file extension directly in the search bar or browse the directory by category or alphabetical index.

Each listing provides a definition of the file extension, common use cases, compatible software, supported platforms, and related or alternative formats.

The database is updated regularly to reflect new file extensions, changes in software compatibility, and evolving file format standards.