Hide a message inside a picture

1, Pick a picture

Drop a picture, or click to choose

JPG, PNG, or WEBP, anything works

{{ encName || 'Your picture' }}

{{ encW }} × {{ encH }} px · fits about {{ capacity.toLocaleString() }} characters

Change

2, Your secret message

Your secret message

{{ secretMessage.length.toLocaleString() }} characters {{ overCapacity ? (secretMessage.length - capacity).toLocaleString() + ' too many for this picture' : (capacity - secretMessage.length).toLocaleString() + ' left' }}

3, Hide it

{{ processing ? 'Hiding…' : 'Hide message in picture' }}

Pick a picture and type a message first.

Your message is longer than this picture can hold. Shorten it, or use a bigger picture.

Download picture Hide another

Done. Save it as a PNG and share it. The message survives only if the file stays a PNG, sending it through apps that re-compress images (like some chats) can wipe it.

Reveal a hidden message

Upload a picture made here and read the message hidden in it. Everything happens on your device.

1, Upload the picture

Drop the PNG, or click to choose

Must be a PNG made with this tool

{{ decName || 'PNG uploaded' }}

Ready to reveal

Change

No secret picture yet? Try decoding this one, we hid something inside

2, Read it

{{ processing ? 'Reading…' : 'Reveal hidden message' }}

{{ decodeError }}

Hidden on {{ decodedTimestamp }}

{{ decodedMessage }}

{{ copied ? 'Copied ✓' : 'Copy message' }} Reveal another

Your pictures never leave your browser. Everything is processed on your own device, nothing is uploaded. It works offline, and there is no sign-up. Curious how the trick works? Read the plain-English explainer.