Image Tool

Convert an image

Convert your images from one format to another (JPEG, PNG, WebP) with quality control.

Convert an image in DocuNest: 100% local processing on Windows, macOS, and Linux. Automatable via the docunest CLI.

Features

Conversion between JPEG, PNG, and WebP

Output quality control

Preservation of original dimensions

Fully local processing

Convert your PNGs to WebP to reduce size while maintaining quality.

Convert a WebP to JPEG for software that does not support the WebP format.

Switch from JPEG to PNG to add transparency in a graphics editor.

Same result as the interface, in one command. Nothing leaves your machine.

docunest — zsh

local

# Convert to WebP
❯ docunest img convert -i photo.png --format webp --quality 85 -o photo.webp
✓ Done — file written locally, no network upload

Which formats are supported?

JPEG, PNG, and WebP for both input and output.

Is transparency preserved?

Yes, if the output format supports it (PNG, WebP). Transparency is lost in JPEG.

Does conversion degrade quality?

Quality depends on the chosen format and level. PNG is lossless; JPEG and WebP are lossy but adjustable.

Reduce the size of your images by adjusting the compression quality, with no visible change.

Crop your images by defining a precise crop area using coordinates.

Convert each page of a PDF into a high-resolution image (PNG, JPEG, or WebP).

Download DocuNest: the complete editor, 7-day trial, no credit card, no files leaving your machine.

No account required, no data collected.

Install a system package, or use the AppImage if you prefer a portable version.

Windows 10+, macOS 12+ (Apple Silicon), Linux (deb / rpm / AppImage)