Supported Formats

SnapOtter processes files across five modalities: image, video, audio, document, and data. This page lists all supported formats.

Image Formats

SnapOtter supports 55+ image formats for input and 13 formats for output.

Input Formats

Web Standards (9)

Format	Extensions	Decoder	Notes
JPEG	.jpg, .jpeg	Sharp (native)
PNG	.png	Sharp (native)	APNG first-frame extracted
WebP	.webp	Sharp (native)
GIF	.gif	Sharp (native)	Animated supported
AVIF	.avif	Sharp (native)
SVG	.svg	Sharp (librsvg)	Sanitized for XXE/SSRF
SVGZ	.svgz	gunzip + Sharp	Gzip bomb protection
APNG	.apng	Sharp (native)	First frame only
JPEG XL	.jxl	djxl / ImageMagick	Two-tier fallback

Professional (7)

Format	Extensions	Decoder	Notes
TIFF	.tiff, .tif	Sharp (native)	Multi-page supported
PSD	.psd	ImageMagick	Flattened composite
EPS	.eps, .epsf	ImageMagick + Ghostscript	300dpi rasterization, security hardened
OpenEXR	.exr	ImageMagick	Linear-to-sRGB conversion
Radiance HDR	.hdr	ImageMagick	Linear-to-sRGB conversion
DPX	.dpx	ImageMagick	Log-to-sRGB conversion
Cineon	.cin	ImageMagick	Film/VFX format

Camera RAW (23)

Format	Extensions	Camera Brand	Decoder
DNG	.dng	Adobe (universal)	exiftool / ImageMagick + LibRaw
CR2	.cr2	Canon (pre-2018)	exiftool / ImageMagick + LibRaw
CR3	.cr3	Canon (2018+)	exiftool / ImageMagick + LibRaw
NEF	.nef	Nikon	exiftool / ImageMagick + LibRaw
NRW	.nrw	Nikon (Coolpix)	exiftool / ImageMagick + LibRaw
ARW	.arw	Sony	exiftool / ImageMagick + LibRaw
ORF	.orf	Olympus	exiftool / ImageMagick + LibRaw
RW2	.rw2	Panasonic	exiftool / ImageMagick + LibRaw
RAF	.raf	Fujifilm	exiftool / ImageMagick + LibRaw
PEF	.pef	Pentax/Ricoh	exiftool / ImageMagick + LibRaw
3FR	.3fr	Hasselblad	exiftool / ImageMagick + LibRaw
IIQ	.iiq	Phase One	exiftool / ImageMagick + LibRaw
SRW	.srw	Samsung	exiftool / ImageMagick + LibRaw
X3F	.x3f	Sigma	exiftool / ImageMagick + LibRaw
RWL	.rwl	Leica	exiftool / ImageMagick + LibRaw
GPR	.gpr	GoPro	exiftool / ImageMagick + LibRaw
FFF	.fff	Hasselblad (legacy)	exiftool / ImageMagick + LibRaw
MRW	.mrw	Minolta	exiftool / ImageMagick + LibRaw
MEF	.mef	Mamiya	exiftool / ImageMagick + LibRaw
KDC	.kdc	Kodak	exiftool / ImageMagick + LibRaw
DCR	.dcr	Kodak	exiftool / ImageMagick + LibRaw
ERF	.erf	Epson	exiftool / ImageMagick + LibRaw
PTX	.ptx	Pentax (compact)	exiftool / ImageMagick + LibRaw

Modern Formats (3)

Format	Extensions	Decoder	Notes
JPEG 2000	.jp2, .j2k, .j2c, .jpc, .jpf, .jpx	opj_decompress / ImageMagick	Digital cinema, medical imaging
QOI	.qoi	Inline TypeScript codec	Game dev, embedded systems
HEIC/HEIF	.heic, .heif	heif-convert / heif-dec	iPhone photos

Legacy/System (4)

Format	Extensions	Decoder	Notes
BMP	.bmp	ImageMagick
ICO	.ico	ImageMagick	Largest layer extracted
CUR	.cur	ImageMagick	Windows cursor (ICO variant)
TGA	.tga	ImageMagick	Extension-only detection

Scientific and Gaming (2)

Format	Extensions	Decoder	Notes
FITS	.fits, .fit, .fts	ImageMagick	Astronomy (NASA standard)
DDS	.dds	ImageMagick	Game textures (DirectX)

Interchange (6)

Format	Extensions	Decoder	Notes
PPM	.ppm	Sharp (native)	Color pixmap
PGM	.pgm	Sharp (native)	Grayscale
PBM	.pbm	Sharp (native)	1-bit bitmap
PNM	.pnm	Sharp (native)	Umbrella format
PAM	.pam	Sharp (native)	Arbitrary map
PFM	.pfm	Sharp (native)	Float map

Output Formats (13)

Format	Encoder	Quality Control	Available In
JPEG	Sharp native	1-100	All tools
PNG	Sharp native	Compression 0-9	All tools
WebP	Sharp native	1-100	All tools
AVIF	Sharp native	1-100	All tools
TIFF	Sharp native	1-100	Full conversion tools
GIF	Sharp native	1-100	Full conversion tools
JXL	Sharp native	1-100	All tools
HEIC	heif-enc CLI	1-100	Full conversion tools
HEIF	heif-enc CLI	1-100	Full conversion tools
BMP	ImageMagick CLI	Lossless	Convert tool
ICO	ImageMagick CLI	Lossless	Convert tool
JP2	opj_compress CLI	Compression ratio	Convert tool
QOI	Inline codec	Lossless	Convert tool

Video Formats

Video decoding and encoding are handled by FFmpeg (static build), so every common container and codec is supported on input.

Input Containers (15)

Format	Extensions	Typical codecs	Notes
MP4	.mp4	H.264, H.265, AV1	Most widely used container
QuickTime	.mov	H.264, ProRes	Apple capture/editing
WebM	.webm	VP8, VP9, AV1	Royalty-free web format
Matroska	.mkv	Any	Flexible open container
AVI	.avi	Various	Legacy Microsoft container
M4V	.m4v	H.264	Apple MP4 variant
AVCHD	.mts	H.264	Camcorder recordings
BDAV	.m2ts	H.264	Blu-ray / AVCHD transport stream
3GP	.3gp	H.264, MPEG-4	Mobile capture
Flash Video	.flv	H.264, VP6	Legacy streaming
Windows Media	.wmv	VC-1, WMV	Windows Media
MPEG	.mpg, .mpeg	MPEG-1, MPEG-2	DVD-era video
MPEG-TS	.ts	MPEG-2, H.264	Broadcast transport stream
Ogg	.ogv	Theora	Open Ogg video

Output Formats

Format	Extension	Video codec	Produced by
MP4	.mp4	H.264	Convert, compress, and most video tools
QuickTime	.mov	H.264	Convert Video
WebM	.webm	VP9	Convert Video
GIF	.gif	-	Video to GIF
WebP	.webp	-	Video to WebP (animated)

Subtitles

Format	Extension	Operations
SubRip	.srt	Embed, burn-in, extract, auto-generate
WebVTT	.vtt	Embed, burn-in, extract, auto-generate
ASS / SSA	.ass	Embed, burn-in (supports styling)

Audio Formats

Audio is also processed by FFmpeg.

Input Formats (11)

Format	Extensions	Compression	Notes
MP3	.mp3	Lossy	Universal compatibility
WAV	.wav	Uncompressed (PCM)	Studio / editing
FLAC	.flac	Lossless	Open lossless codec
AAC	.aac	Lossy	Raw AAC stream
M4A	.m4a	Lossy (AAC) / Lossless (ALAC)	MPEG-4 audio
Ogg Vorbis	.ogg	Lossy	Open format
Opus	.opus	Lossy	Modern, low-latency
WMA	.wma	Lossy	Windows Media Audio
AIFF	.aiff	Uncompressed (PCM)	Apple uncompressed
AMR	.amr	Lossy	Speech / mobile
AC-3	.ac3	Lossy	Dolby Digital

Output Formats

Format	Extension	Codec	Produced by
MP3	.mp3	LAME	Convert Audio, Extract Audio
WAV	.wav	PCM	Convert Audio, Extract Audio
FLAC	.flac	FLAC (lossless)	Convert Audio
Ogg	.ogg	Vorbis	Convert Audio
M4A	.m4a	AAC	Convert Audio, Extract Audio

Document Formats

Document processing uses qpdf, LibreOffice, Ghostscript, Pandoc, and WeasyPrint.

Input Formats (15)

Format	Extensions	Engine	Notes
PDF	.pdf	qpdf, Ghostscript, pdfcpu	Core document format
Word	.docx, .doc	LibreOffice	Microsoft Word
Excel	.xlsx, .xls	LibreOffice	Microsoft Excel
PowerPoint	.pptx, .ppt	LibreOffice	Microsoft PowerPoint
OpenDocument	.odt, .ods, .odp	LibreOffice	Text, sheet, presentation
Rich Text	.rtf	LibreOffice	Cross-app rich text
Plain Text	.txt	LibreOffice, Pandoc	UTF-8 text
Markdown	.md	Pandoc	CommonMark / GFM
HTML	.html	WeasyPrint	Rendered to PDF
EPUB	.epub	Pandoc, LibreOffice	E-book format

Output Formats

Format	Extensions	Produced by
PDF	.pdf	Word/Excel/PowerPoint to PDF, Markdown to PDF, HTML to PDF
PDF/A	.pdf	PDF/A Convert (archival)
Word	.docx, .odt, .rtf, .txt	Convert Document, PDF to Word, Markdown to Word
Presentation	.pptx, .odp	Convert Presentation
Spreadsheet	.xlsx, .ods, .csv	Convert Spreadsheet
HTML	.html	Markdown to HTML
EPUB	.epub	Convert to EPUB
Images	.png, .jpg	PDF to Image

File Formats

Data and archive tools convert between structured formats and bundle files.

Format	Extensions	Conversions
CSV	.csv	To/from JSON and Excel; split and merge; from XML
JSON	.json	To/from CSV, XML, and YAML
XML	.xml	To/from JSON; to CSV
YAML	.yaml, .yml	To/from JSON
Excel	.xlsx	To/from CSV
ZIP	.zip	Create archives, extract contents