Image to ASCII Art Converter
Drop an image, pick a character set, and watch it turn into ASCII art — entirely in your browser. Photos never leave your device.
Pick the Right Character Set
Each charset trades off detail for readability. Use the charset command in the terminal, or tap the charset button on mobile, to switch between them.
| Charset | Sample | Best for |
|---|---|---|
| simple | .:-=+*#%@ | Clean line art, logos, high-contrast photos |
| detailed | .'`^",:;Il!i><~+_-?][}{1)(|/tfjrxnuvc... | Portraits and photos with smooth gradients |
| blocks | ░▒▓█ | Pixel art, retro game screenshots, posters |
| dots | ⠁⠂⠃⠄⠅⠆⠇⡀⡁⡂⡃⡄⡅⡆⡇ | Braille-style halftone, dense detail |
| minimal | .*# | Tiny icons, terminal splashes, banners |
How Image to ASCII Conversion Works
Image-to-ASCII conversion is a brightness-mapping problem. Asciify loads your image into a hidden HTML canvas, downscales it to your chosen output width, and steps through every cell to compute average luminance. Each luminance value is mapped to a character in the active charset — darker cells get denser glyphs like @ or #, brighter cells get sparser ones like . or a space.
Output width controls the trade-off between detail and readability. For text-rendered ASCII (terminal, README), keep width at 80-120. For PNG export at high zoom, push to 200 to preserve facial features and edges. The aspect ratio is automatically corrected because monospace characters are roughly twice as tall as they are wide.
Toggle invert for dark-background images so the brightness mapping is reversed. This is the single biggest quality lever for screenshots, logos on dark UIs, and night photography.
Frequently Asked Questions
- How does an image to ASCII converter work?
- The converter samples your image at the chosen output width, calculates the brightness of each cell, and replaces it with a character from the active charset — denser characters for darker pixels, sparser characters for brighter ones. Asciify performs this entirely in your browser using the Canvas API, so no image is ever uploaded.
- What image formats can I convert?
- Asciify accepts JPG, PNG, GIF, WebP, and BMP. You can drag and drop a file, paste from the clipboard, or load from a URL using the 'url' command. Animated GIFs use the first frame; for animated ASCII output, generate a static frame and apply the matrix or glitch effect.
- Is the image uploaded to your server?
- No. Image-to-ASCII conversion runs 100% client-side in your browser via the Canvas API. The pixels never leave your device. Only when you choose 'Save to gallery' does the resulting ASCII text (not the source image) get sent for public sharing.
- Which character set should I pick?
- Use 'simple' for line art and logos, 'detailed' for portraits, 'blocks' for pixel-art-style output, 'dots' for halftone-like density, and 'minimal' for ultra-compact banners. You can switch charset at any time and the preview updates instantly.
- How can I improve the result for photos?
- Increase the output width to 120-200 columns, use the 'detailed' charset, and toggle 'invert' if your photo has a dark background. For high-contrast results, set monochrome color mode and apply the CRT effect. Cropping the image to the subject before uploading also helps.
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