File Extension Wiki

What common file extensions are, how to open them, whether they're safe, and whether you can delete them.

Image files

.jpg .png .webp .heic .svg .gif .bmp .ico .avif

PDF files

Video & audio files

.mp4 .mp3 .wav .mov .webm .avi .mkv .flac .aac .m4a

Document files

.docx .doc .txt .md .rtf .pptx

Data files

.csv .json .xml .xlsx .xls .yaml .sql

System & other files

.dll .bin .crdownload .zip .exe .iso .tmp .apk