Free online PNG to ADOC converter

Source format: PNG

PNG (Portable Network Graphics) is a raster image format widely used for screenshots, logos, diagrams, icons, and web graphics. It supports lossless compression and transparency, which makes it a common choice when image quality and clean edges matter. PNG files are typically created by graphic editors, screen capture tools, cameras with export options, and design software.

Target format: ADOC

ADOC is an AsciiDoc document file, a plain-text format used for writing technical documentation, manuals, README files, and books. Its main advantages are readability, easy version control, and flexible publishing to formats such as HTML, PDF, and EPUB. Unlike PNG, ADOC is not an image format; it is a text-based markup format, so converting PNG to ADOC usually means embedding the image inside an AsciiDoc document or creating an AsciiDoc file that references the image.

How to perform the conversion

The best approach depends on what you want the ADOC file to contain:

1. If you want an AsciiDoc file that displays the PNG image

Create a new .adoc file and insert an image macro that points to the PNG file:

image::picture.png[]

If the image is in a subfolder, use a relative path such as image::images/picture.png[].

You can create or edit the file in any text editor, such as VS Code, Notepad++, or Vim. Save it with the .adoc extension.

2. If you want to convert the PNG into documentation content

Open the PNG in an image viewer or editor and manually describe it in AsciiDoc. For example, a screenshot can be turned into step-by-step documentation with headings, lists, and the image included as a figure.

3. If you want to preview or publish the result

Use an AsciiDoc processor such as Asciidoctor to render the file:

asciidoctor file.adoc

This generates HTML output by default. If you need PDF or other formats, use the appropriate Asciidoctor backend or toolchain.

Using the built-in online converter

You can convert the file on 101convert.com for free, without installing any software. Upload the PNG, choose ADOC as the target format, and download the generated result. This is convenient for quick conversions, especially when you only need a simple AsciiDoc file that references or packages the image.

Notes on quality, compatibility, and limitations

PNG to ADOC is not a true image-to-text conversion. ADOC cannot store pixel data the way PNG does, so the result is usually either an AsciiDoc wrapper around the image or a manually written document that describes the image. If you need OCR to extract text from a screenshot, use an OCR tool first, then place the recognized text into the ADOC file.

For best compatibility, keep the PNG file in the same folder as the .adoc file or use a correct relative path. When publishing, ensure the image is accessible to the AsciiDoc processor. Large PNG files may increase document size and slow rendering, while transparent PNGs generally work well in AsciiDoc output.

If your goal is to edit the image itself, convert it to a raster-editing format instead; ADOC is meant for documentation, not image editing.