ASCII Viewer

ASCII Viewer converts either plain text or image sources into ASCII art suitable for terminal displays, documentation, or educational demonstrations. It targets developers, system engineers, educators, and designers who require deterministic rendering without graphical UI. When a user needs a quick ASCII preview for logos, diagrams, or plain text, the tool provides a reproducible representation by applying a configurable rendering pipeline.

For image inputs, the process: fetch the image, resize to the target width measured in characters, convert to grayscale, map grayscale values to a ordered character set, and render row by row. For text inputs, wrap text to the requested width. The mapping uses a standard grayscale ramp plus a user-selectable charset (e.g., @%#*+=-:. ). It supports deterministic output by using the same source and settings.

Applications span terminal art in README files, learning materials, bug repros in environments without fonts, and quick previews during automation pipelines. It differentiates itself by offering a minimal, dependency-free rendering pipeline, explicit inputs, clear outputs, and configurable character sets. It also handles edge cases like non-ASCII characters by transliteration or replacement depending on settings.

Core features include mode selection, width control, optional charset, error handling, and stateless outputs. Use cases include substituting images for ASCII thumbnails, verifying text wrapping in logs, and producing consistent previews for documentation.