How to Convert an Image to ASCII Art

Start with a readable source

Images with one clear subject, a simple background and a useful range from dark to light translate most reliably. Tiny details that are smaller than one output character disappear, so crop tightly before converting.

Portraits usually improve when the face fills most of the frame. Logos benefit from high contrast and a plain background.

• Crop around the subject
• Prefer clear edges over fine texture
• Use a larger original when possible

Choose the output density

Density controls the number of text columns. More columns preserve detail, but create wider output that may wrap in chat or documentation. Fewer columns produce a stronger, poster-like silhouette.

Text characters are usually taller than they are wide. A converter must compensate for that aspect ratio or the result looks vertically stretched.

• 28–50 columns for chat
• 50–80 for README files
• 80–110 for detailed exports

Balance brightness, contrast and gamma

Brightness moves the whole image toward light or dark. Contrast separates neighboring tones. Gamma changes the middle tones without moving the darkest and lightest points as aggressively.

Adjust one control at a time. First make the subject recognizable with brightness, then separate it from the background with contrast, and finally use gamma to recover facial or shadow detail.

Pick a character ramp

A glyph ramp orders characters from visually dense to visually light. A classic ramp such as @%#*+=-:. gives smooth shading, while blocks create bolder shapes. A short custom ramp creates a graphic, poster-like effect.

Ordered dithering deliberately varies neighboring character choices. It can reveal gradients in skies and faces, but may add distracting texture to logos or line drawings.

Export for the destination

Copy plain text for terminals, code blocks and messages. Use TXT when whitespace must remain intact in a file. PNG is safer for social platforms that do not preserve monospace alignment.

Before publishing text output, preview it at the destination width. A beautiful desktop result can become unreadable after mobile line wrapping.

• Text for editable, lightweight output
• PNG for predictable visual layout
• Transparent PNG for compositing