Comprimio — Free Image Compressor & Converter for Mac

Batch conversion

Drop a folder. Go get a coffee.

Files run in parallel across up to eight lanes. A new one starts the instant a lane frees up — and cancelling really stops everything.

0 / 6 converted

Space saved

0 MB → 0 MB

Parallel lanes · one per core, minus one

Everything in one window

Small app. Serious toolbox.

Live side-by-side preview

Original and result next to each other, with zoom and panning synced across both panes. An estimated output size updates as you tweak — zoom in for the full-resolution render.

PNG · 4.8 MBWebP · 412 KB

Output formats

From JPEG, WebP, AVIF and JPEG XL to PSD, OpenEXR and PDF. Reads 155 extensions, including camera RAW.

Resize

Percentage, fit in a box, fixed width or height, exact size, or fill and crop. Never enlarge smaller originals.

LanczosMitchellCatromDPI

Fine-grained control

Quality ceilings per format, lossless WebP and JXL, chroma subsampling, progressive JPEG, sRGB conversion.

4:4:4EXIF strip8-bit PNG

Watermarks

Logo or text, nine positions, opacity, scale, rotation and tiling — consistent on every image, whatever its size.

TiledOutlineCustom font

Adjust on the fly

Auto-orient from EXIF, rotate and flip, brightness, contrast, saturation, sharpen, blur and grayscale — applied to the whole batch.

Lands where you want it

Subfolder, same folder or anywhere you choose. Prefix and suffix with a live preview of the name, and a sortable summary of every byte saved.

Privacy by design

Your images stay home.

Zero network access. Not for updates, not for analytics, not ever.
Sandboxed. Comprimio only sees the files and folders you hand it.
Nothing to install. ImageMagick ships inside the app — no Homebrew, no terminal.
No data collected. As declared on the App Store.

formats it writes

extensions it reads

languages: EN · IT · DE · ES · FR

bytes sent anywhere

Open source

Free. Forever. Read every line.

~ git clone https://github.com/Michediana/Comprimio.git
~ cd Comprimio
~/Comprimio open Comprimio.xcodeproj
# Build and run. That's it.
# No Homebrew. No ImageMagick install. No package manager.
✓ Build succeeded

Built in SwiftUI, in the open.

Native SwiftUI with Liquid Glass on macOS 26 and translucent materials before it. Signed, notarised, sandboxed — and the whole thing is on GitHub. Issues, ideas and pull requests are welcome.

View on GitHub →Download .dmg

Supported formats

Every format, spelled out.

Comprimio writes 125 formats and reads 155 extensions — camera RAW included. The list is built from the ImageMagick bundled inside the app, so what you see here is exactly what you get.

Image formats supported by Comprimio for Mac: read and write support, quality, alpha and lossless options

JPEG	.jpg	Web & everyday	Read & write	Yes	No	No
PNG	.png	Web & everyday	Read & write	No	Yes	No
WebP	.webp	Web & everyday	Read & write	Yes	Yes	Yes
AVIF	.avif	Web & everyday	Read & write	Yes	Yes	No
HEIC	.heic	Web & everyday	Read & write	Yes	Yes	No
TIFF	.tiff	Web & everyday	Read & write	Yes	Yes	No
GIF	.gif	Web & everyday	Read & write	No	Yes	No
BMP	.bmp	Web & everyday	Read & write	No	No	No
JPEG XL	.jxl	Web & everyday	Read & write	Yes	Yes	Yes
HEIF	.heif	Web & everyday	Read & write	Yes	Yes	No
8-bit PNG (palette)	.png	Variants	Read & write	No	Yes	No
24-bit PNG	.png	Variants	Read & write	No	Yes	No
32-bit PNG (RGBA)	.png	Variants	Read & write	No	Yes	No
48-bit PNG	.png	Variants	Read & write	No	Yes	No
64-bit PNG (RGBA)	.png	Variants	Read & write	No	Yes	No
PNG (inherits depth and type)	.png	Variants	Read & write	No	Yes	No
Progressive JPEG	.jpg	Variants	Read & write	Yes	No	No
BMP version 2	.bmp	Variants	Read & write	No	No	No
BMP version 3	.bmp	Variants	Read & write	No	No	No
GIF 87a	.gif	Variants	Read & write	No	No	No
BigTIFF (64-bit TIFF)	.tif	Variants	Read & write	Yes	Yes	No
Pyramidal TIFF	.ptif	Variants	Read & write	Yes	Yes	No
JPEG 2000	.jp2	Photo, HDR & cinema	Read & write	Yes	Yes	No
Uncompressed JPEG 2000 (PGX)	.pgx	Photo, HDR & cinema	Read & write	No	No	No
OpenEXR	.exr	Photo, HDR & cinema	Read & write	No	Yes	No
Radiance HDR	.hdr	Photo, HDR & cinema	Read & write	No	No	No
Portable Float Map	.pfm	Photo, HDR & cinema	Read & write	No	No	No
Portable Half Float Map	.phm	Photo, HDR & cinema	Read & write	No	No	No
FilmLight FL32	.fl32	Photo, HDR & cinema	Read & write	No	No	No
DPX (SMPTE 268M)	.dpx	Photo, HDR & cinema	Read & write	No	No	No
Cineon	.cin	Photo, HDR & cinema	Read & write	No	No	No
Stereoscopic JPEG (JPS)	.jps	Photo, HDR & cinema	Read & write	Yes	No	No
JNG (JPEG Network Graphics)	.jng	Photo, HDR & cinema	Read & write	Yes	Yes	No
MNG (multiple-image PNG)	.mng	Photo, HDR & cinema	Read & write	No	Yes	No
Photoshop (PSD)	.psd	Graphics & editing	Read & write	No	Yes	No
Photoshop Large Document (PSB)	.psb	Graphics & editing	Read & write	No	Yes	No
MIFF (Magick Image File)	.miff	Graphics & editing	Read & write	No	Yes	No
MPC (Magick Pixel Cache)	.mpc	Graphics & editing	Read & write	No	Yes	No
VIPS	.v	Graphics & editing	Read & write	No	Yes	No
Targa (TGA)	.tga	Graphics & editing	Read & write	No	Yes	No
PCX (ZSoft Paintbrush)	.pcx	Graphics & editing	Read & write	No	No	No
DCX (multi-page PCX)	.dcx	Graphics & editing	Read & write	No	No	No
DDS (DirectDraw Surface)	.dds	Graphics & editing	Read & write	Yes	Yes	No
DDS with DXT1 compression	.dds	Graphics & editing	Read & write	No	No	No
DDS with DXT5 compression	.dds	Graphics & editing	Read & write	No	Yes	No
QOI (Quite OK Image)	.qoi	Graphics & editing	Read & write	No	Yes	No
Farbfeld	.ff	Graphics & editing	Read & write	No	Yes	No
SGI (Irix RGB)	.sgi	Graphics & editing	Read & write	No	Yes	No
Sun Rasterfile	.ras	Graphics & editing	Read & write	No	No	No
PICT (QuickDraw)	.pict	Graphics & editing	Read & write	No	Yes	No
WordPerfect Graphics	.wpg	Graphics & editing	Read & write	No	No	No
Palm Pixmap	.palm	Graphics & editing	Read & write	No	Yes	No
Palm Database (PDB)	.pdb	Graphics & editing	Read & write	No	No	No
Aseprite	.ase	Graphics & editing	Read & write	No	Yes	No
AAI Dune	.aai	Graphics & editing	Read & write	No	Yes	No
AVS X	.avs	Graphics & editing	Read & write	No	Yes	No
PFS: 1st Publisher (ART)	.art	Graphics & editing	Read & write	No	No	No
MATLAB (level 5)	.mat	Graphics & editing	Read & write	No	Yes	No
Khoros VIFF	.viff	Graphics & editing	Read & write	No	Yes	No
Khoros XV	.xv	Graphics & editing	Read & write	No	Yes	No
IPL Image Sequence	.ipl	Graphics & editing	Read & write	No	Yes	No
MTV Raytracing	.mtv	Graphics & editing	Read & write	No	No	No
CALS Type 1	.cals	Graphics & editing	Read & write	No	No	No
Slow Scan TeleVision (HRZ)	.hrz	Graphics & editing	Read & write	No	No	No
Simple File Format (SF3)	.sf3	Graphics & editing	Read & write	No	Yes	No
LEGO Mindstorms EV3 (RGF)	.rgf	Graphics & editing	Read & write	No	No	No
Cisco IP Phone	.cip	Graphics & editing	Read & write	No	No	No
On-the-air bitmap (OTB)	.otb	Graphics & editing	Read & write	No	No	No
PDF	.pdf	Documents & vector	Read & write	Yes	Yes	No
PDF/A	.pdf	Documents & vector	Read & write	Yes	Yes	No
Encapsulated PDF (EPDF)	.epdf	Documents & vector	Read & write	Yes	No	No
PostScript	.ps	Documents & vector	Read & write	Yes	No	No
PostScript level 2	.ps	Documents & vector	Read & write	Yes	No	No
PostScript level 3	.ps	Documents & vector	Read & write	Yes	No	No
Encapsulated PostScript (EPS)	.eps	Documents & vector	Read & write	Yes	No	No
EPS level 2	.eps	Documents & vector	Read & write	Yes	No	No
EPS level 3	.eps	Documents & vector	Read & write	Yes	No	No
EPS Interchange (EPI)	.epi	Documents & vector	Read & write	Yes	No	No
EPS with TIFF preview	.ept	Documents & vector	Read & write	Yes	No	No
Adobe Illustrator (AI)	.ai	Documents & vector	Read & write	Yes	No	No
PCL (HP printers)	.pcl	Documents & vector	Read & write	No	No	No
ICO (Windows icon)	.ico	Icons & system	Read & write	No	Yes	No
CUR (Windows cursor)	.cur	Icons & system	Read & write	No	Yes	No
X BitMap (XBM)	.xbm	Icons & system	Read & write	No	No	No
X PixMap (XPM)	.xpm	Icons & system	Read & write	No	Yes	No
Wireless Bitmap (WBMP)	.wbmp	Icons & system	Read & write	No	No	No
Personal Icon (PICON)	.picon	Icons & system	Read & write	No	Yes	No
PNM (Portable Anymap)	.pnm	Netpbm & fax	Read & write	No	No	No
PBM (black and white)	.pbm	Netpbm & fax	Read & write	No	No	No
PGM (grayscale)	.pgm	Netpbm & fax	Read & write	No	No	No
PPM (color)	.ppm	Netpbm & fax	Read & write	No	No	No
PAM	.pam	Netpbm & fax	Read & write	No	Yes	No
Raw bi-level bitmap	.mono	Netpbm & fax	Read & write	No	No	No
Group 3 fax	.fax	Netpbm & fax	Read & write	No	No	No
Group 3	.g3	Netpbm & fax	Read & write	No	No	No
Group 4	.g4	Netpbm & fax	Read & write	No	No	No
Raw CCITT Group 4	.g4	Netpbm & fax	Read & write	No	No	No
Color map (MAP)	.map	Netpbm & fax	Read & write	No	No	No
Raw RGB	.rgb	Raw pixel dumps	Write only	No	No	No
Raw RGBA	.rgba	Raw pixel dumps	Write only	No	Yes	No
Raw RGBO (opacity)	.rgbo	Raw pixel dumps	Write only	No	Yes	No
Raw BGR	.bgr	Raw pixel dumps	Write only	No	No	No
Raw BGRA	.bgra	Raw pixel dumps	Write only	No	Yes	No
Raw BGRO (opacity)	.bgro	Raw pixel dumps	Write only	No	Yes	No
Raw CMYK	.cmyk	Raw pixel dumps	Write only	No	No	No
Raw CMYKA	.cmyka	Raw pixel dumps	Write only	No	Yes	No
Raw gray	.gray	Raw pixel dumps	Write only	No	No	No
Raw gray with alpha	.graya	Raw pixel dumps	Write only	No	Yes	No
Raw YCbCr	.ycbcr	Raw pixel dumps	Write only	No	No	No
Raw YCbCr with alpha	.ycbcra	Raw pixel dumps	Write only	No	Yes	No
YUV (CCIR 601)	.yuv	Raw pixel dumps	Write only	No	No	No
Interlaced UYVY	.uyvy	Raw pixel dumps	Write only	No	No	No
PAL (16-bit interlaced YUV)	.pal	Raw pixel dumps	Write only	No	No	No
Bayer mosaic	.bayer	Raw pixel dumps	Write only	No	No	No
Bayer mosaic with alpha	.bayera	Raw pixel dumps	Write only	No	Yes	No
FITS (astronomy)	.fits	Scientific	Read & write	No	No	No
VICAR (NASA)	.vicar	Scientific	Read & write	No	No	No
Text (pixel listing)	.txt	Text & braille	Write only	No	Yes	No
Formatted text (FTXT)	.ftxt	Text & braille	Write only	No	Yes	No
SIXEL (DEC graphics)	.sixel	Text & braille	Write only	No	No	No
BRF braille	.brf	Text & braille	Write only	No	No	No
ISO 11548-1 braille	.isobrl	Text & braille	Write only	No	No	No
ISO 11548-1 six-dot braille	.isobrl6	Text & braille	Write only	No	No	No
Unicode braille	.ubrl	Text & braille	Write only	No	No	No
Unicode six-dot braille	.ubrl6	Text & braille	Write only	No	No	No
Hasselblad 3FR	.3fr	Camera RAW	Read only	No	No	No
Sony ARW	.arw	Camera RAW	Read only	No	No	No
Canon CR2	.cr2	Camera RAW	Read only	No	No	No
Canon CR3	.cr3	Camera RAW	Read only	No	No	No
Canon CRW	.crw	Camera RAW	Read only	No	No	No
Kodak DCR	.dcr	Camera RAW	Read only	No	No	No
Adobe DNG	.dng	Camera RAW	Read only	No	No	No
Epson ERF	.erf	Camera RAW	Read only	No	No	No
Hasselblad FFF	.fff	Camera RAW	Read only	No	No	No
Phase One IIQ	.iiq	Camera RAW	Read only	No	No	No
Kodak K25	.k25	Camera RAW	Read only	No	No	No
Kodak KDC	.kdc	Camera RAW	Read only	No	No	No
Minolta MDC	.mdc	Camera RAW	Read only	No	No	No
Mamiya MEF	.mef	Camera RAW	Read only	No	No	No
Leaf MOS	.mos	Camera RAW	Read only	No	No	No
Minolta MRW	.mrw	Camera RAW	Read only	No	No	No
Nikon NEF	.nef	Camera RAW	Read only	No	No	No
Nikon NRW	.nrw	Camera RAW	Read only	No	No	No
Olympus ORF	.orf	Camera RAW	Read only	No	No	No
Pentax PEF	.pef	Camera RAW	Read only	No	No	No
Fujifilm RAF	.raf	Camera RAW	Read only	No	No	No
Generic camera RAW	.raw	Camera RAW	Read only	No	No	No
Panasonic RW2	.rw2	Camera RAW	Read only	No	No	No
Leica RWL	.rwl	Camera RAW	Read only	No	No	No
Sony SR2	.sr2	Camera RAW	Read only	No	No	No
Sony SRF	.srf	Camera RAW	Read only	No	No	No
Samsung SRW	.srw	Camera RAW	Read only	No	No	No
Sinar STI	.sti	Camera RAW	Read only	No	No	No
Sigma X3F	.x3f	Camera RAW	Read only	No	No	No
SVG	.svg	Vector & animated	Read only	No	No	No
Compressed SVG	.svgz	Vector & animated	Read only	No	No	No
MSVG (built-in SVG renderer)	.msvg	Vector & animated	Read only	No	No	No
MVG (Magick Vector Graphics)	.mvg	Vector & animated	Read only	No	No	No
Animated PNG (APNG)	.apng	Vector & animated	Read only	No	No	No
Multi-Picture Object (MPO)	.mpo	Vector & animated	Read only	No	No	No
XPS document	.xps	Vector & animated	Read only	No	No	No
GIMP (XCF)	.xcf	Other editors & legacy	Read only	No	No	No
Kodak Photo CD	.pcd	Other editors & legacy	Read only	No	No	No
Kodak Photo CD (4×)	.pcds	Other editors & legacy	Read only	No	No	No
DICOM (medical)	.dcm	Other editors & legacy	Read only	No	No	No
DICOM (medical)	.dicom	Other editors & legacy	Read only	No	No	No
JBIG	.jbg	Other editors & legacy	Read only	No	No	No
JBIG	.jbig	Other editors & legacy	Read only	No	No	No
Dr. Halo CUT	.cut	Other editors & legacy	Read only	No	No	No
MacPaint	.mac	Other editors & legacy	Read only	No	No	No
Alias PIX	.pix	Other editors & legacy	Read only	No	No	No
Alias/Wavefront RLA	.rla	Other editors & legacy	Read only	No	No	No
Utah RLE	.rle	Other editors & legacy	Read only	No	No	No
Raw Media Format	.rmf	Other editors & legacy	Read only	No	No	No
Seattle FilmWorks	.sfw	Other editors & legacy	Read only	No	No	No
Seattle FilmWorks multi-image	.pwp	Other editors & legacy	Read only	No	No	No
Scitex HandShake	.sct	Other editors & legacy	Read only	No	No	No
ZX Spectrum SCREEN$	.scr	Other editors & legacy	Read only	No	No	No
Brother embroidery (PES)	.pes	Other editors & legacy	Read only	No	No	No
Garmin tile (JNX)	.jnx	Other editors & legacy	Read only	No	No	No
PlayStation TIM	.tim	Other editors & legacy	Read only	No	No	No
PlayStation 2 TIM2	.tm2	Other editors & legacy	Read only	No	No	No

No format matches your search.

182 of 182 formatsRead & writeRead only raster input, not written backWrite only headerless data, not read back

Lighter images, in seconds.

Free on the Mac App Store. No ads, no in-app purchases, no catch.