hydrus/docs/filetypes.md

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Supported Filetypes

This is a list of all filetypes Hydrus can import. Hydrus determines the filetype based on examining the file itself rather than the extension or MIME type.

Images

Filetype	Extension	MIME type	Thumbnails	Viewable in Hydrus	Notes
jpeg	.jpeg	image/jpeg	✅	✅
png	.png	image/png	✅	✅
static gif	.gif	image/gif	✅	✅
webp	.webp	image/webp	✅	✅	Animated webp files will display as static
tiff	.tiff	image/tiff	✅	✅
qoi	.qoi	image/qoi	✅	✅	Quite OK Image Format
icon	.ico	image/x-icon	✅	✅
bmp	.bmp	image/bmp	✅	✅
heif	.heif	image/heif	✅	✅
heic	.heic	image/heic	✅	✅
avif	.avif	image/avif	✅	✅

Animations

Filetype	Extension	MIME type	Thumbnails	Viewable in Hydrus	Notes
animated gif	.gif	image/gif	✅	✅
apng	.apng	image/apng	✅	✅
heif sequence	.heifs	image/heif-sequence	✅	✅
heic sequence	.heics	image/heic-sequence	✅	✅
avif sequence	.avifs	image/avif-sequence	✅	✅

Video

Filetype	Extension	MIME type	Thumbnails	Viewable in Hydrus	Notes
mp4	.mp4	video/mp4	✅	✅
webm	.webm	video/webm	✅	✅
matroska	.mkv	video/x-matroska	✅	✅
avi	.avi	video/x-msvideo	✅	✅
flv	.flv	video/x-flv	✅	✅
quicktime	.mov	video/quicktime	✅	✅
mpeg	.mpeg	video/mpeg	✅	✅
ogv	.ogv	video/ogg	✅	✅
realvideo	.rm	video/vnd.rn-realvideo	✅	✅
wmv	.wmv	video/x-ms-wmv	✅	✅

Audio

Filetype	Extension	MIME type	Viewable in Hydrus	Notes
mp3	.mp3	audio/mp3	✅
ogg	.ogg	audio/ogg	✅
flac	.flac	audio/flac	✅
m4a	.m4a	audio/mp4	✅
matroska audio	.mkv	audio/x-matroska	✅
mp4 audio	.mp4	audio/mp4	✅
realaudio	.ra	audio/vnd.rn-realaudio	✅
tta	.tta	audio/x-tta	✅
wave	.wav	audio/x-wav	✅
wavpack	.wv	audio/wavpack	✅
wma	.wma	audio/x-ms-wma	✅

Applications

Filetype	Extension	MIME type	Thumbnails	Viewable in Hydrus	Notes
flash	.swf	application/x-shockwave-flash	✅	❌
pdf	.pdf	application/pdf	✅	❌	300 DPI assumed for resolution. No thumbnails for encrypted PDFs.
epub	.epub	application/epub+zip	❌	❌
djvu	.djvu	image/vnd.djvu	❌	❌

Image Project Files

Filetype	Extension	MIME type	Thumbnails	Viewable in Hydrus	Notes
psd	.psd	image/vnd.adobe.photoshop	✅	✅	Adobe Photoshop
clip	.clip	application/clip1	✅	❌	Clip Studio Paint
sai2	.sai2	application/sai21	❌	❌	PaintTool SAI2
krita	.kra	application/x-krita	✅	❌	Krita
svg	.svg	image/svg+xml	✅	❌
xcf	.xcf	application/x-xcf	❌	❌	GIMP
procreate	.procreate	application/x-procreate1	✅	❌	Procreate app

Archives

Filetype	Extension	MIME type	Notes
7z	.7z	application/x-7z-compressed
gzip	.gz	application/gzip
rar	.rar	application/vnd.rar
zip	.zip	application/zip

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1. This filetype doesn't have an official or de facto media type, the one listed was made up for Hydrus. ↩︎