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Updated Oct 16, 2026

Utilities

Convert a PNG to lossless WebP

webp-encode is a lossless PNG-to-WebP encoding node powered by cwebp.

Agent
Create lossless web imagesPreserve transparent pixelsKeep conversion reproducible

overview

What webp-encode does

Encode one 8-bit RGB or RGBA PNG with native cwebp. The result is a lossless WebP image, preserving pixels rather than the PNG encoding. Source bytes remain unchanged. Resizing and metadata copying are outside this operation.

8-bit RGB/RGBA PNG to native lossless WebP only; 16 MiB, 4096x4096, 60 seconds, 512 MiB address space; exact pixel roundtrip checks

Input or native processing failures fail the operation. The operation keeps the supplied source unchanged.

This operation uses 1.2.4-deb12u1. Upstream license: BSD-3-Clause. The source link identifies the program used by this node.

source chromium.googlesource.com/webm/libwebp/+/v1.2.4

use cases

Where webp-encode fits

Create lossless web images

Convert supplied PNG pixels to a VP8L WebP artifact.

Preserve transparent pixels

Encode RGBA PNG input without choosing a lossy quality setting.

Keep conversion reproducible

Keep the supplied PNG and review the returned WebP separately.

reference

webp-encode inputs and flags

1 inputs
NameTypeFlagDescription
imageFILE--image8-bit RGB/RGBA PNG, up to 16 MiB and 4096x4096 pixels. Native lossless encoding, 60 seconds, 512 MiB address space, 32 MiB output. No resizing or metadata copy; symlinks refused.

Showing key inputs. webp-encode exposes 1 inputs in total.

example

Run webp-encode

webp-encode · command
python3 /app/run.py --image ./input.txt ./output

guidance

Choosing webp-encode

Choose this node for a fixed lossless PNG-to-WebP conversion. ImageMagick offers broader image processing; JPEG optimization is a separate operation.

imagemagick

Provides general image conversion; this node exposes only lossless PNG-to-WebP encoding.

faq

webp-encode questions

image: 8-bit RGB/RGBA PNG, up to 16 MiB and 4096x4096 pixels. Native lossless encoding, 60 seconds, 512 MiB address space, 32 MiB output. No resizing or metadata copy; symlinks refused.

Lossless WebP. Native processing must succeed before an output artifact is returned.

8-bit RGB/RGBA PNG to native lossless WebP only; 16 MiB, 4096x4096, 60 seconds, 512 MiB address space; exact pixel roundtrip checks

Choose this node for a fixed lossless PNG-to-WebP conversion. ImageMagick offers broader image processing; JPEG optimization is a separate operation.

The image repository also contains a digest-bound source/notices artifact. Download it with oras pull docker.io/nenadzaric/skills-intel-webp-encode@sha256:8833fb6d7c67af298bbd54dbc67e9298a970c9aede9771a2f4ea17bb2805ca0a. The bundle includes the build recipe, licenses, copied notices and component-source directions. Bundle SHA256: a462e8ec56cbcbba760da6ee892f4b6679d31ae78f6b50ae92f2983e2c9b1824. Follow its source directions for upstream archives and patches. Image and source/notices repository.

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Run webp-encode yourself

The synthetic run checks lossless webp. The saved verifier records the result; this text page does not reproduce the native artifact. The command shown is the container entrypoint with example paths, not a host-installed CLI command.

Open webp-encode in the libraryBuild a workflow with it

Facts on this page come from the live Trickest tool library.