Turn PGM images into WebP. It is converted in your browser, so the file never leaves your device.
Drop PGM files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop PGM files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Save the WebP, or download everything as one ZIP if you converted several files.
The PGM to WebP converter is part of this page and runs inside your browser. Your images are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
PGM files are uncompressed and greyscale only, and few everyday apps open them. WebP is smaller than JPG or PNG at similar quality and keeps transparency. PGM is at home in greyscale images in scientific and command-line tools; WebP is the usual choice for images on websites.
The defaults suit most files. Under Options you can set the quality, aim for a target file size and resize the result.
The WebP encoder is a WebAssembly module that downloads the first time you convert to WebP and is cached afterwards. Pictures with more than 8 bits per channel are reduced to 8 bits when they are decoded.
PGM is the greyscale member of the Netpbm family: a text header and then one brightness value per pixel, uncompressed. It is used in image-processing courses, computer vision datasets and Unix pipelines where a minimal format helps.
Opens in GIMP, ImageMagick, IrfanView and Unix graphics tools; not browsers
PGM converterWebP is Google's image format for the web. It is typically a quarter to a third smaller than JPG or PNG at similar quality and supports both transparency and animation. Browsers handle it well; older editors, printers' portals and some messaging apps do not.
Opens in All current browsers; many older desktop apps and upload forms do not accept it
WebP converter| PGMPGM image | WEBPWebP image | |
|---|---|---|
| Stands for | Portable Graymap | WebP |
| Type | Raster image | Raster image |
| Compression | None | Lossy or lossless |
| Transparency | No | Yes |
| Animation | No | Yes |
| Introduced | 1988, by Jef Poskanzer | 2010, by Google |
| Opens in | GIMP, ImageMagick, IrfanView and Unix graphics tools; not browsers | All current browsers; many older desktop apps and upload forms do not accept it |
| Best for | Greyscale images in scientific and command-line tools | Images on websites |
| File extension | .pgm | .webp |
No. The PGM to WebP conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
A little: ToAny writes WebP in its lossy mode, so a small amount of detail is traded for a much smaller file. At the default setting the difference is hard to notice. You can raise the quality under Options; there is no lossless setting.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the PGM file, press Convert and save the WebP. There is nothing to install.
Pictures of up to 120 megapixels are accepted (for example 12,000 by 10,000 pixels); a larger one is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.