About CatTower
CatTower is a free, ad-supported set of independent online tools for images and documents. There is no sign-up: drop a file and get a result in seconds.
The tools
- Image resizer and converter
Resize images and convert between PNG, JPEG and WebP online for free.
- Background remover
Remove the background from any image with AI and download a transparent PNG.
- Color palette extractor
Extract the dominant colors from an image as HEX and RGB values.
- Image to text (OCR)
Extract text from images that mix Korean, English, Japanese or Chinese with OCR. Copy the result instantly.
- Idea mind map generator
Turn a TXT, MD, PDF or DOCX document into a summary, keywords, an idea mind map and questions to explore.
How it works
Each tool has its own page. Upload an image (PNG, JPEG or WebP) or a document (TXT, MD, PDF or DOCX), up to 20 MB, and the result comes back in seconds. Files are processed on request and are not stored.
The idea mind map turns a document into a summary, a keyword mind map and questions to explore. If you want more, it can add optional AI ideas: an expert view, counterarguments and connected ideas.
Free, with ads
The tools are free. Each includes a few free uses per day, and a short ad gives you more. Ads on each page pay for the service.
Languages
The site is available in English and Korean.
Contact
Questions? See the contact page.
Email: [email protected]