FAQ
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Frequently Asked Questions
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**How can I contact the author?**
    The author can be contacted at this email: ``contact@codepoems.eu``

**Which technologies are used?**
    XL Converter was written in Python and PySide6. Image processing is done via libjxl, libavif (AOM AV1), and ImageMagick.

**How will I know the conversion was successful?**
    The program will notify you when something goes wrong.

**What will happen if "Delete Original" is enabled and the conversion fails?**
    The original image will stay intact. There are safety mechanisms.

**The program doesn't do what I need.**
    Try also `XnViewMP <https://xnview.com/>`_ (Ctrl + U opens the converter). Generated PNG images can be used with XL Converter.

**Where are config files located?**
    * Windows (installer): ``%LOCALAPPDATA%/xl-converter``
    * Windows (portable): ``xl-converter/_internal/user_data``
    * Linux: ``~/.config/xl-converter``

**Can I use distance instead of quality with JPEG XL / JPEGLI?**
    Distance is already used internally for both JPEG XL and JPEGLI in XL Converter. Quality is remapped to distance by ``libjxl``.

**What are the "tmp\_" files in the output directory?**
    Those are temporary files. You may see them left over from canceled or failed conversions. You can safely remove them.

**What is XL Converter, who made it, and when?**
    * XL Converter is an image converter focused on technologies with high compression ratio. The program can encode JPEG XL, AVIF, JPEG (with JPEGLI), WebP, and PNG. It's a popular choice for Lossless JPEG Transcoding.
    * XL Converter was created entirely by one programmer -- me. You can call me Jacob.
    * It was published in August 2023 and remains under active development.

**Is XL Converter safe?**
    Yes!

    * The source code is `publicly available <https://github.com/JacobDev1/xl-converter>`_ (and auditable).
    * Every release is scanned with multiple antivirus programs before release.
    * XL Converter has been out since August 2023. Plenty of people trust it.

    Please make sure you are downloading XL Converter from the `official website <https://codepoems.eu/xl-converter/>`_. Downloading software via unofficial means can be unsafe.

    False positives are rare, but may happen -- `here is why <https://github.com/pyinstaller/pyinstaller/blob/develop/.github/ISSUE_TEMPLATE/antivirus.md>`_.

    Regarding VirusTotal, false positives are very common when only up to 4 engines flag a file as malicious. **Please make sure the engines you believe aren't notorious for false positives.** Some engines on VirusTotal are overly aggressive or of poor quality. Well-known engines are more likely to be trustworthy.

    That being said, don't hesitate to email me with your concerns.