Image Steganography
Hide a secret message inside a PNG.
Runs entirely in your browser — nothing you enter is uploaded, logged, or tracked.
Steganography hides information in plain sight. Drop in a PNG and a message — optionally encrypt it with a password first — and the tool writes the secret into the least-significant bits of the pixels, producing a near-identical image you can share. Anyone with this tool (and the password) can extract it; everyone else just sees a picture. All in your browser.
Frequently asked questions
Will the image look different?
Almost imperceptibly — only the lowest bit of each color channel is altered, which the eye can’t see. The result must stay a PNG (re-saving as JPEG would destroy the hidden data).
Is the hidden message encrypted?
Optionally — add a password and the message is AES-256-GCM encrypted before being embedded, so even someone who suspects steganography can’t read it without the password.
How much text can I hide?
About (width × height × 3) ÷ 8 bytes — one bit per color channel. A typical photo holds tens of kilobytes of text.
Is anything uploaded?
No — embedding and extraction happen entirely in your browser.