GRTM2CD 🗺️🐈🐕

Sometimes we find a treasure map and want to keep it secret.
Why don't you split the map in two, and let a cat and a dog each keep a piece?
When we want to use the map, we just call both the cat and the dog.

This web tool helps in situations like that.
Don't worry—this page works entirely on your computer, and your data is never sent to the web.

Encode

Step 1: Treasure Map

[ Drop Treasure Map here — any file ]

Step 2: Carrier Images

Format: JPEG, PNG, WebP, BMP, GIF
Output: PNG

[ Drop Cat Image here ]

[ Drop Dog Image here ]

Decode

Drop 2 carrier images (order and filenames do not matter)

[ Drop Image 1 ]

[ Drop Image 2 ]

Reference: Standard Resolution Table

Portrait sizes available (W and H swapped)
System maximum: ≈ 36 MB compressed payload (Carrier limit: 16,777,216 pixels per image)