LocalSqueeze
Local, free, unlimited image compression – open source.
Download LocalSqueeze
Installer for Apple Silicon (M1/M2/M3) Macs (.dmg)
Other downloads (3)
Getting a "can't verify the developer" warning?
If you see a warning on first launch, go to System Settings > Privacy & Security and click "Open Anyway". Open source software usually isn't signed with an Apple developer certificate, which is normal.
Clicking "Download" takes you to a source confirmation page first; the download starts after confirmation.
About LocalSqueeze
一款可以压缩图片的桌面端应用(图片压缩工具)，只在本地运行。不限大小、不限数量。安全、快速、高质量。
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Risk notice
This app is distributed via GitHub Releases. The project does not explicitly mention code signing, so macOS may prompt 'Unidentified Developer' on first launch, and Windows SmartScreen may show a warning. Please download only from the official GitHub repository and verify version details before installing. Also, as an open-source project maintained by an individual, updates and support may be less frequent than commercial software.
Who it's for
- Users who care about image privacy and prefer everything to stay on their device
- Designers or web operators who need to batch-compress large numbers of images
- Individuals who want a free tool without subscription or API limits
- Professionals who need fine control over compression settings and format conversion
- Developers who enjoy exploring and modifying open-source projects
Who it's not for
- Users who need a Linux desktop build (only Windows and macOS are currently supported)
- Users who expect cloud sync or cross-device access to compression history (everything stays local)
- Users who require vendor-backed support or strict SLA guarantees (this is a community open-source project)
Install guide
macOS
- Apple Silicon (M1/M2/M3 etc.): download
LocalSqueeze-apple-silicon.dmg(recommended), orLocalSqueeze-darwin-arm64-1.0.4.zip. - Intel Macs: download
LocalSqueeze-intel.dmg(recommended), orLocalSqueeze-darwin-x64-1.0.4.zip.
Double-click the .dmg, then drag LocalSqueeze.app into the Applications folder. For .zip files, unzip and place the resulting .app into your Applications folder.
If macOS warns that the app is from an unidentified developer, go to System Settings → Privacy & Security and click Open Anyway, or right-click LocalSqueeze.app in Finder and select Open.
Windows
- We recommend
LocalSqueeze-Setup.exe. You can also chooseLocalSqueeze.msiorLocalSqueezeSetup.msi. - Alternatively, download
LocalSqueeze-win32-x64-1.0.4.zip, unzip it, and run the executable inside.
Double-click the .exe or .msi and follow the installer steps. If SmartScreen appears, verify that you downloaded the file from the project’s official GitHub Release and click More info → Run anyway.
FAQ
Is LocalSqueeze completely free?
Yes. It is open source under the MIT license, and can be used free of charge with no API call limits (the README states there are no restrictions on image size or quantity).
Which operating systems are supported?
Currently Windows and macOS are supported. For macOS, both Apple Silicon and Intel are covered; for Windows, x64 builds are provided. There is no Linux version yet.
Are my images uploaded to a server?
No. All processing happens locally on your machine. The app does not upload images anywhere.
How do I update to a new release?
Check the project’s GitHub Releases page and install the latest package for your platform. Alternatively, you can build it yourself with `npm run make` if you have a development environment.
Can I modify or customize the software?
Yes. The project is open source under the MIT license, so you can read the code, modify it, and use it for personal or commercial purposes.