Caesium
No liveness check has reached it yet; it is registered on GitHub and has been in the index since 9 Oct 2026. How this is checked
Caesium Image Compressor is a desktop and online tool for reducing image file sizes while preserving visual quality. It supports batch processing, real-time previews, metadata options, folder structure preservation, Windows and macOS downloads, and a command-line tool.
Inferred · not functionally tested
Overview
6 featuresPurpose: Reducing image file sizes without visibly degrading quality for storage, sharing, and publishing.
Inferred · not functionally tested
Audience: photographers, bloggers, webmasters, businesses, and casual image users
Inferred · not functionally tested
Functions: Unknown
Interfaces: API: unknown · MCP: unknown · CLI: indicated (inferred, not tested) · Self-hosting: unknown
Recorded constraints: pricing: free · license: GPL-3.0 · platforms: DESKTOP, CLI, WEB · deployment: browser, cli, macos, windows
Constraint provenance is unknown; confirm requirements with the publisher.
Record sources: saerasoft.com · github.com. These links do not verify the individual claims.
Caesium sits in PulseGate's Compression & format conversion category. Inferred · not functionally tested: It focuses on reducing image file sizes without visibly degrading quality for storage, sharing, and publishing. Inferred · not functionally tested: Caesium is a consumer product aimed at photographers, bloggers, webmasters, businesses, and casual image users. Basis unknown · not verified: Caesium is free to use. Basis unknown · not verified: It ships for the web, the command line, macOS, and Windows.
SaeraSoft builds and maintains Caesium, and it first shipped in 2016. The project is developed in the open on GitHub with 6.4k stars and 6 commits in the last 90 days. Inferred · not functionally tested: Key capabilities include image compression, batch processing, and real-time preview.
Summary written by a language model from the project’s public pages.
Tasks: Inferred · not functionally tested
- Image compression
- Batch processing
- Real-time preview
- Metadata options
- Folder support
- Command-line tool
Topics: Inferred · not functionally tested
Built with & integrations
- Astro
- /_astro/ in the HTML
- Cloudflare
- cf-ray header · cf-cache-status header
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
Frequently asked questions about Caesium
- What is Caesium?
- Inferred · not functionally tested: Caesium focuses on reducing image file sizes without visibly degrading quality for storage, sharing, and publishing. It is catalogued under Compression & format conversion on PulseGate.
- Who is Caesium for?
- Inferred · not functionally tested: Caesium is a consumer product built for photographers, bloggers, webmasters, businesses, and casual image users.
- Is Caesium free?
- Basis unknown · not verified: Yes — Caesium is free to use.
- What platforms does Caesium run on?
- Basis unknown · not verified: Caesium runs on the web, the command line, macOS, and Windows.
- Is Caesium still maintained?
- The GitHub repository shows 6 commits in the last 90 days.
- What projects are similar to Caesium?
- Similar projects tracked by PulseGate include IntoConvert, PicsFixKit, and Converting.cloud.IntoConvertPicsFixKitConverting.cloud
- Who makes Caesium?
- Caesium is developed by SaeraSoft.
- How long has Caesium been around?
- Caesium first shipped in 2016.
Also in Compression & format conversion
Same category — not a similarity match