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Caesium Image Compressor

Caesium is a free, open source image compression software that helps you reduce the file size of images (JPG, PNG, WebP, TIFF) while preserving quality. It supports batch processing, real-time preview, metadata options, and is cross-platform (Windows, macOS, Linux).
Latest: 2.8.5
Last checked: Jun 9, 2026 12:10am
Rank: 3955/15140
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Overview

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License: GPL-3.0Installer: Windows Installer, Portable, DMG (macOS)Winget: Available

Version & Lifecycle

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Current: 2.8.5 N-2: 2.5.1 Avg cadence: Every 47 days

Top Contributors

Top sitewide contributors:

  1. Anbarasan
  2. nico_k
  3. Bob
  4. Vigneshwaran

Community Notes

Deployment tip • May 2, 2026
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Caesium Image Compressor update conflict and source note

For managed Caesium Image Compressor Windows updates, close the application before launching the installer. Deployment testing flags this as an app-specific conflict case: the EXE/User x64 installers can return Exit Code 5 when Caesium Image Compressor is still running. Use a pre-close, user-deferral, or conflicting-process step, then rerun detection and verify the installed binaries/version rather than relying on blind retries.

Use the official project/vendor page as the package source: Caesium Image Compressor official download/source page.

For managed Caesium Image Compressor updates, close Caesium before launching the installer. If it is still running, the update can return Exit Code 5; close the application first and verify the installed build afterward.

Source: Caesium Image Compressor official source.

Release Notes & Updates

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Avg cadence:
Updates • 0

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Also known as

Other names people use for this app — helps search and matching.

caesiumimagecompressorsaerasoft caesiumimagecompressor

Packaging Notes

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Available as Windows installer, portable version, and macOS DMG. Mirrors hosted on fosshub.com and GitHub.

Notes

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Developed by SaeraSoft. Source code available on GitHub. Popular among photographers, bloggers, and webmasters for image optimization.