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Universal Image Converter
What Universal Image Converter is
Universal Image Converter is a free Windows desktop application for converting image files between formats. It handles JPG, PNG, WEBP, TIFF, BMP, HEIC, ICO, and other formats. Images can be added by dragging them into the interface or selecting them through a file browser. For larger jobs, the app can convert folders in batches and apply custom output naming. It includes a graphical interface and a command-line interface, with documented commands for converting an individual image or a folder. The command-line option supports automation and scripting as well as interactive use through the GUI. The interface offers dark and light themes. The v2.0.0 release describes error logging and remembering the output folder among its changes. Windows downloads are available through GitHub Releases as a portable application or installer; the v2.0.0 release also describes a ZIP package containing the GUI, CLI, screenshots, and readme. The project is built with Python, Tkinter, ttkbootstrap, Pillow, and, in v2, tkinterDnD2. It is open source under the MIT License, subject to that license’s terms. Security updates are provided for the latest major version.
Who it suits
Universal Image Converter suits Windows users who need to change image formats, including people processing folders with custom output names. Its GUI supports manual use, while the command-line interface is suited to automation and scripting.
What it does well
- Converts JPG, PNG, WEBP, TIFF, BMP, HEIC, ICO, and other formats.
- Accepts images through drag-and-drop or a file browser.
- Converts folders in batches with custom output naming.
- Includes both a graphical interface and a command-line interface.
- Offers dark and light themes.
- Released under the MIT License.
What to know first
- Available for Windows only.
- Does not provide image resizing or color mode conversion.
- Security updates cover only the latest major version.
Limits
The free plan is a free and open-source desktop app for image conversion across multiple formats. It does not include image resizing, color mode conversion, or API access.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | Free and open-source desktop app; image conversion across multiple formats | Free |
As github.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Getting started
- Open the project website on GitHub.
- Go to GitHub Releases for the Windows download.
- Choose the portable app or installer, or use the v2.0.0 ZIP package.
- Add images by drag-and-drop or through the file browser, then convert them in the GUI or use the command-line interface.
Verdict
Choose Universal Image Converter if you want a free Windows tool with both a graphical interface and command-line conversion. Its folder batches and custom output naming suit repeated jobs; look elsewhere if you need resizing, color mode conversion, or a platform other than Windows.
Questions
How much does Universal Image Converter cost?
The Free plan costs nothing.
Is there a free plan or trial?
A free plan is available. There is no free trial.
Which platforms does it support?
It is a Windows desktop application. The project describes a Windows-compatible executable and links to GitHub Releases.
Which image formats can it convert?
The project lists JPG, PNG, WEBP, TIFF, BMP, HEIC, ICO, and other formats.
Does it have a command-line interface?
Yes. The project includes a CLI and documents commands for single-image and folder conversion.
Is Universal Image Converter open source?
Yes. The repository includes an MIT License, which permits use, copying, modification, distribution, sublicensing, and sale subject to its terms.
Facts from Universal Image Converter's own pages
- Batch conversion
- The app supports batch folder conversion with custom output naming. · github.com, 8 Oct 2026
- Error handling
- The v2.0.0 release lists error logging and persistent memory of the output folder among its changes. · github.com, 8 Oct 2026
- Formats
- The project lists JPG, PNG, WEBP, TIFF, BMP, HEIC, and other formats, and also names ICO in its description. · github.com, 8 Oct 2026
- GUI and CLI
- The project includes both a graphical interface and a command-line interface for automation and scripting. · github.com, 8 Oct 2026
- Input methods
- Users can add images by drag-and-drop or through a file browser. · github.com, 8 Oct 2026
- Intended use
- The maker describes command-line conversion as suitable for automation or scripting and documents single-image and folder conversion commands. · github.com, 8 Oct 2026
- License
- The repository includes an MIT License that permits use, copying, modification, distribution, sublicensing, and sale subject to its terms. · github.com, 8 Oct 2026
- Purpose
- Universal Image Converter is a desktop tool for converting image files between multiple formats. · github.com, 8 Oct 2026
- Release package
- The v2.0.0 release describes a ZIP package containing the GUI, CLI, screenshots, and readme. · github.com, 8 Oct 2026
- Security updates
- The security policy says the project is in active development and only the latest major version receives security updates. · github.com, 8 Oct 2026
- Technology
- The app is built with Python, Tkinter, ttkbootstrap, and Pillow; the v2 release also lists tkinterDnD2. · github.com, 8 Oct 2026
- Themes
- The interface can switch between dark and light themes. · github.com, 8 Oct 2026
- Vulnerability support
- The maintainer asks users to report vulnerabilities by email and aims to respond within 3–5 business days. · github.com, 8 Oct 2026
- Windows download
- The README describes a Windows-compatible executable available as a portable app or installer, and links to GitHub Releases for downloads. · github.com, 8 Oct 2026
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