Image Tool

Compress an image

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

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

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Preview of Compress an image in DocuNest, offline PDF app

Features

Precise control over quality level (0-100)

Support for JPEG, PNG, and WebP formats

Significant reduction in file size

100% local and private processing

Use cases

Web optimization

Compress your images before uploading them to a website to speed up loading times.

Emailing

Reduce the size of a photo to comply with attachment limits.

Storage

Compress your photos to save disk space.

Command line

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

docunest — zsh

local

# Compress an image
❯ docunest img compress -i photo.jpg --quality 70 --format jpeg -o compressed.jpg
✓ Done — file written locally, no network upload

Complete CLI documentation →

Frequently asked questions

Is the visual quality affected?

With a quality of 70-85, the difference is generally imperceptible to the eye.

Which formats are supported?

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

Can I compress multiple images at once?

In the CLI, you process each image individually. In the graphical interface, batch processing is available.

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Compress a PDF

Reduce the size of your PDF files by recompressing the embedded images, with adjustable quality. Directly in DocuNest's unified PDF editor (Document menu).

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