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Pricing Blog

PNG to SFW

Looking to convert PNG to SFW? Here's the honest answer — and what works instead.

We don't create SFW files — it's a legacy format that's effectively read-only. Here's what to convert to instead.

Why PNG to SFW isn't offered

1

SFW is legacy and read-only here

SFW (Seattle FilmWorks) is a proprietary 1990s photo-lab format. It can usually be opened and converted from, but it's long obsolete, so there's no modern encoder to create new SFW files.

2

Convert to a current format

For a file that opens everywhere, convert your PNG to JPG, TIFF or WEBP instead.

What you can do instead

Convert PNG to JPG

A small, universal photo format that opens everywhere.

PNG → JPG

Convert PNG to TIFF

Lossless and uncompressed — ideal for editing, archiving and print.

PNG → TIFF

Convert PNG to WEBP

A modern format with small files at high quality for the web.

PNG → WEBP
Private — never stored Fast & secure Unlimited & free

Related free tools

Image ConverterFree toolPNG to JPGFree toolHEIC to JPGFree toolWEBP to PNGFree tool
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Format details

PNG is a lossless raster format with full transparency. It keeps every pixel intact, making it ideal for logos, icons, screenshots and graphics with sharp edges.

Full namePortable Network Graphics
Developed byPNG Development Group
Released1996
Extension.png
MIME typeimage/png
TransparencyYes

PNG opens in every browser and image viewer, plus Photoshop, GIMP, Preview and Photos.

SFW is Seattle FilmWorks' proprietary format from its mail-order film-developing service, which delivered scans in this locked format.

Full nameSeattle FilmWorks Image
Developed bySeattle FilmWorks
Released1994
Extension.sfw
MIME typeimage/sfw
TransparencyVaries

SFW opens with SFW converters and IrfanView; convert to JPG to free the images for normal use.

Frequently asked questions

Not here — SFW is a legacy format with no modern encoder. We can often read SFW as a source, but for output use a current format like JPG, TIFF or WEBP.

PNG converts to JPG, TIFF or WEBP — free, no sign-up, no watermark.

Popular free tools

Image ConverterPNG to JPGHEIC to JPGWEBP to PNGResize ImageCrop ImagePNG to WEBPImage Compressor