Image to ASCII Art Converter
Turn any image into ASCII art in your browser. Adjust width, invert brightness, then copy or download the text. Nothing is uploaded.
Pure browser JavaScript — uses FileReader and the Canvas getImageData API.
How to use this tool
- Choose an image from your device.
- Set the output width in characters and optionally Invert for dark backgrounds.
- Click Convert, then Copy or Download the ASCII art as a .txt file.
Turn any image into ASCII art in your browser. Adjust width, invert brightness, then copy or download the text. Nothing is uploaded.
How it works
The Image to ASCII Art Converter maps the brightness of each pixel in your image to a character from a predefined set, arranged from dense (dark) to sparse (light). The image is first scaled to the target character width, then each pixel's luminance is looked up in the character ramp to produce a text representation of the image.
You can adjust the output width (in characters) to make the art more or less detailed. An invert option swaps the brightness mapping, which is useful for images that look better when rendered on a dark terminal background. The resulting ASCII text can be copied to the clipboard or downloaded as a plain text file.
This tool runs entirely in your browser using a canvas element -- nothing is uploaded. It is useful for creating retro-style artwork, terminal decorations, README headers, or novelty text versions of photos.
Worked example
Convert a portrait photo to ASCII art
- Upload a high-contrast portrait photo (JPEG or PNG).
- Set the width to 80 characters for a standard terminal-width output.
- If the face appears as white space, enable the Invert option to flip brightness.
- Click Copy to copy the ASCII text, then paste it into a text editor or README file.
An 80-column ASCII representation of the portrait, with recognizable facial features visible as character density.
Common mistakes to avoid
- Using a very small character width (under 40) on a detailed image, which loses too much resolution to be recognizable.
- Forgetting to invert when pasting into a dark-background terminal, making the image look washed out or blank.
- Uploading a high-resolution photo and expecting the tool to use all that detail -- only the character width setting determines output resolution.
Key terms
- Character ramp
- An ordered string of characters ranging from visually dense (like @ or #) to sparse (like . or space), used to represent dark to light pixel values.
- Luminance
- The perceived brightness of a pixel, calculated from its red, green, and blue values using a weighted formula.
- Invert
- Reverses the brightness-to-character mapping so that dark pixels become sparse characters -- useful for light-on-dark terminal displays.
Frequently asked questions
- How does it work?
- The image is downscaled to a small grid on a canvas; each cell's brightness is mapped to a character from a light-to-dark ramp.
- Is my image uploaded?
- No — FileReader and Canvas do everything locally; the image never leaves your browser.