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.

The filetype for a file can be overridden with manage -> force filetype in the context menu for a file.

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`	✅	✅
ugoira	`.zip`	`application/zip`	✅	❌	Pixiv Ugoira format. A zip file containing images with 6 digit zero-padded filenames will be identified as a Ugoira file.

Video¶

Filetype	Extension	MIME type	Thumbnails	Viewable in Hydrus
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
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`	❌	❌
docx	`.docx`	`application/vnd.openxmlformats-officedocument.wordprocessingml.document`	❌	❌
xlsx	`.xlsx`	`application/vnd.openxmlformats-officedocument.spreadsheetml.sheet`	❌	❌
pptx	`.pptx`	`application/vnd.openxmlformats-officedocument.presentationml.presentation`	✅	❌	300 DPI assumed for resolution. Thumbnail only if embedded in the document
rtf	`.rtf`	`application/rtf`	❌	❌

Image Project Files¶

Filetype	Extension	MIME type	Thumbnails	Viewable in Hydrus	Notes
psd	`.psd`	`image/vnd.adobe.photoshop`	✅	✅	Adobe Photoshop. Hydrus shows the embedded preview image if present in the file.
clip	`.clip`	`application/clip`¹	✅	❌	Clip Studio Paint
sai2	`.sai2`	`application/sai2`¹	❌	❌	PaintTool SAI2
krita	`.kra`	`application/x-krita`	✅	✅	Krita. Hydrus shows the embedded preview image if present in the file.
svg	`.svg`	`image/svg+xml`	✅	❌
xcf	`.xcf`	`application/x-xcf`	❌	❌	GIMP
procreate	`.procreate`	`application/x-procreate`¹	✅	❌	Procreate app

Archives¶

Filetype	Extension	MIME type	Thumbnails	Notes
7z	`.7z`	`application/x-7z-compressed`	❌
gzip	`.gz`	`application/gzip`	❌
rar	`.rar`	`application/vnd.rar`	❌
zip	`.zip`	`application/zip`	❌
cbz	`.cbz`	`application/vnd.comicbook+zip`	✅	A zip file containing images with incrementing numbers in their filenames will be identified as a cbz file. The code for identifying a cbz file is in `hydrus/core/HydrusArchiveHandling.py`

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