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Convert CAL to APNG (Animated PNG)

Convert CAL images to APNG (Animated PNG) format, edit and optimize images online and free.

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Continuous Acquisition and Life-cycle Support Type 1 Image (.cal)

The CAL file extension, known as CALS (Continuous Acquisition and Life-cycle Support) Type 1 Image, is a 1-bit black-and-white raster image format developed by the U.S. Department of Defense in the mid-1980s to standardize graphics data interchange for military documentation. It is primarily used for storing and sharing monochrome images while retaining orientation metadata. The format supports both uncompressed and compressed (using CCITT Group 4 compression) images.

CAL Converter

Animated Portable Network Graphics (.apng)

Animated Portable Network Graphics (APNG) is an extension of the Portable Network Graphics (PNG) format designed to support animated images. Introduced in 2004, APNG allows for animated sequences while retaining backward compatibility with non-animated PNG files. This format is utilized for its lossless compression, making it ideal for web graphics where image quality is paramount. APNG files are widely used for animated icons, logos, and other elements that benefit from high-quality animations without the artifacts common in GIF files. Its concise, efficient structure makes it a preferred choice among developers and designers focused on optimizing web performance.

APNG Converter More About APNG

How to convert CAL to APNG (Animated PNG)?

  1. Upload CAL File

    Select a CAL image from your computer, or drag & drop it on the page.

  2. Select CAL Tools

    Choose any CAL to APNG (Animated PNG) converter tools for a customized conversion, and click Convert.

  3. Download Your APNG (Animated PNG)

    Give it a moment for the APNG (Animated PNG) conversion to complete, then download your file afterward.

Convert CAL to APNG

Frequently Asked Questions

How to change CAL format to APNG?

To change CAL format to APNG, upload your CAL file to proceed to the preview page. Use any available tools if you want to edit and manipulate your CAL file. Click on the convert button and wait for the convert to complete. Download the converted APNG file afterward.

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macOS
Windows
Linux

Convert CAL to APNG (Animated PNG) on macOS

Follow steps below if you have installed Vertopal CLI on your macOS system.

  1. Open macOS Terminal.
  2. Either cd to CAL file location or include path to your input file.
  3. Paste and execute the command below, substituting in your CAL_INPUT_FILE name or path. $ vertopal convert CAL_INPUT_FILE --to apng

Convert CAL to APNG (Animated PNG) on Windows

Follow steps below if you have installed Vertopal CLI on your Windows system.

  1. Open Command Prompt or Windows PowerShell.
  2. Either cd to CAL file location or include path to your input file.
  3. Paste and execute the command below, substituting in your CAL_INPUT_FILE name or path. $ vertopal convert CAL_INPUT_FILE --to apng

Convert CAL to APNG (Animated PNG) on Linux

Follow steps below if you have installed Vertopal CLI on your Linux system.

  1. Open Linux Terminal.
  2. Either cd to CAL file location or include path to your input file.
  3. Paste and execute the command below, substituting in your CAL_INPUT_FILE name or path. $ vertopal convert CAL_INPUT_FILE --to apng

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