You can upload the following types (and other file types not listed below, except those in the forbidden list).
Images
jpg, jpeg, png, gif, webp, bmp, tiff, tif, ico, svg, heic, avif
Documents
pdf, doc, docx, rtf, odt, txt, epub
Spreadsheets
xls, xlsx, ods, csv
Presentations
ppt, pptx, odp
Archives
zip, rar, 7z, tar, gz
Audio
mp3, wav, ogg, flac, m4a
Video
mp4, mov, webm, mkv, avi
Data & code
json, xml, html, htm
Not allowed: php, php3, php4, php5, php7, php8, phtml, phar, phps, pht, pgif, exe, sh, bat, cmd, com, scr, js, mjs, cjs, pl, py, pyc, pyo, cgi, asp, aspx, ashx, cer, jsp, jspf, jspx, vbs, vbe, wsf, dll, msi, hta, htc — including as any dotted segment in the name (e.g. .php.jpg is rejected).