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pnmtorle — Convert a PNM file to an Utah Raster Tools RLE image file. More information: <https://netpbm.sourcef

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandconvertclifileutahrasterpnmtorlepnm

Problem

How to use the pnmtorle command: Convert a PNM file to an Utah Raster Tools RLE image file. More information: <https://netpbm.sourceforge.net/doc/pnmtorle.html>.

Solution

pnmtorle — Convert a PNM file to an Utah Raster Tools RLE image file. More information: <https://netpbm.sourceforge.net/doc/pnmtorle.html>.

Convert a PNM image to an RLE image:

pnmtorle {{path/to/input.pnm}} > {{path/to/output.rle}}

Print PNM header information to stdout:

pnmtorle {{[-verb|-verbose]}} {{path/to/input.pnm}} > {{path/to/output.rle}}

Include a transparency channel in the output image in which every black pixel is set to fully transparent and every other pixel is set to fully opaque:

pnmtorle {{[-a|-alpha]}} {{path/to/input.pnm}} > {{path/to/output.rle}}

Code Snippets

Convert a PNM image to an RLE image

pnmtorle {{path/to/input.pnm}} > {{path/to/output.rle}}

Print PNM header information to `stdout`

pnmtorle {{[-verb|-verbose]}} {{path/to/input.pnm}} > {{path/to/output.rle}}

Include a transparency channel in the output image in which every black pixel is set to fully transparent and every other pixel is set to fully opaque

pnmtorle {{[-a|-alpha]}} {{path/to/input.pnm}} > {{path/to/output.rle}}

Context

tldr-pages: common/pnmtorle

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