Caesium Image Compressor
v2.8.5Open sourceReleased 17 May 2025
Shrink JPG, PNG and WebP files in bulk without visible quality loss. By SaeraSoft (Matteo Paonessa)
- Windows
- macOS
By the ToolsBharat teamUpdated 17 May 2025How we check
Quick answer
Caesium Image Compressor is open source software for Windows and macOS from SaeraSoft (Matteo Paonessa). Shrink JPG, PNG and WebP files in bulk without visible quality loss. Download it only from saerasoft.com. The latest version we track is 2.8.5 (17 May 2025). ToolsBharat links straight to the publisher's own download page, with no bundled offers.
- Latest version:
- 2.8.5 (17 May 2025)
- Publisher:
- SaeraSoft (Matteo Paonessa)
- Official site:
- saerasoft.com
- Licence:
- Open source — GPL-3.0
- Requirements:
- Windows 10 (1809) or later
Our verdict
Caesium is a handy way to cut photo sizes before uploading them to government portals, job sites or email, where size limits are common. It compresses whole folders at once and shows a before/after preview. It does not crop or edit images.
Screenshots
Key features
- Batch compression of JPG, PNG and WebP
- Resize by dimensions or percentage
- Lossless and lossy modes with preview
Free online tools for this
On our sister site MuftTools.in, made by DVM Techno, the team behind ToolsBharat. They run in your browser, with nothing to install.
- Photo resizer (KB, pixels, cm)Resize a photo to an exact KB or pixel size for a form.
- Image compressorReduce a photo's size in KB without visible loss.
- Passport size photo makerMake passport photos and print a sheet of them.
- Photo background changer (white, blue)Switch a photo's background to plain white or blue.
Pros
- Pro: Fast batch processing
- Pro: Portable version available
Cons
- Con: Compression only — no editing tools
What's new in 2.8.5
See what changed in 2.8.5 in the official release notes
Version history
Version 2.8.5Latest
17 May 2025 · 22.2 MB- SHA-256
- The developer does not publish one
- Source
- Release notes
Official downloads by platform
For Windows, use the Download button. Other platforms go straight to the publisher's own page or official store.
Requirements
- OS
- Windows 10 (1809) or later
- Architecture
- 64-bit
Licence
- Type
- Open source
- Licence
- GPL-3.0
- Publisher
- saerasoft.com
Where these facts come from
Checked 30 Oct 2026
FAQ
Can Caesium reduce a photo to under 50 KB for a form upload?
Usually, yes. Combine a lower quality setting with resizing to smaller dimensions, then check the preview before saving.
User reviews
User reviewsयूज़र रिव्यू
No reviews yet
Used Caesium Image Compressor? Reviews appear after moderation; we never import or invent ratings.
Caesium Image Compressor
2.8.5 · 22.2 MB