About This Steganography Playground
Overview:
This steganography tool allows you to hide secret messages or entire files within visible
text and carrier files (such as images or videos or other binaries). The tool employs advanced
techniques to cloak your data without drawing attention. You can also fetch Nostr event and
check if text includes hidden messages.
How It Works:
Everything performed by this tool happens entirely client-side, meaning your data never
leaves your device. The tool has two main functions: Text Steganography and File Steganography.
The tool converts hidden messages into binary strings using zero‑width characters, appending them
invisibly to your visible message. Hidden files are encoded into Base64 and appended to carrier files using a unique marker.
Encryption:
When you provide an encryption key, the tool encrypts the hidden content using AES encryption.
The same key is required to decrypt and extract the hidden data. It is advised to protect any
private information or digital payment invoices with a password, as bots can easily be programmed
to immediately claim these invoices.
Steganography Methods:
This tool leverages multiple steganography techniques and none of them is LSB (Least Significant Bit):
-
Two Zero-Width Characters Method (ZWNJ & ZWJ) – Encode & Decode:
Binary data is encoded using
\u200Cand\u200Dto represent bits 0 and 1 respectively. Used for plain text and emoji-based carrier messages. -
Three Zero-Width Characters Method (ZWSP, ZWNJ & ZWJ) – Decode-Only (Fallback):
Provides enhanced compatibility for decoding messages hidden with other tools using
\u200B,\u200C, and\u200D. - File Payload Embedding – Encode & Decode: Hides files or text data inside other files (like images or documents) by appending Base64-encoded payloads with a unique marker.
-
Emoji Steganography (Paul Butler’s Method) – Decode-Only:
Extracts hidden bytes from Unicode variation selectors embedded in emoji characters.
Based on Paul Butler’s emoji-encoder.
Note: This method currently supports decoding only.
File Hiding Capabilities:
You can hide images, text files, or any file type - each file is encoded (and optionally encrypted) before being appended to a carrier file.
However, please be aware that when you share images online, many social media platforms and websites automatically
compress or convert the file format. This process often reduces file size and standardizes formats, but it may also
remove additional data embedded within the file. In some cases, these platforms strip out metadata or extra hidden
information during upload. As a result, if your hidden data relies on being preserved exactly, it might be altered
or lost once shared on these sites.
Best Image Formats for Data and Text Embedding:
Lossless image formats are generally the best choice for embedding data, since they preserve every bit of the original
image without discarding information. PNG and TIFF are popular options because they maintain all data,
ensuring that your hidden information remains intact. Other lossless formats, like GIF, can also be used; however,
keep in mind that GIFs are limited to a 256-color palette, which may not be ideal if you require higher color fidelity or
have complex images. Additionally, formats like BMP or lossless modes of WebP might be considered, but
they often have compatibility issues or less efficient compression compared to PNG.
On the other hand, the vast majority of images on the internet—over 80%—are in the JPEG format. JPEG uses lossy
compression, which significantly reduces file size by discarding some image data. This efficiency is critical for storing
and transferring huge volumes of images (saving gazillions of terabytes of disk space), which is why it is so widely adopted.
However, because JPEG compression removes some data permanently, it is not ideal for embedding information that needs to be
preserved exactly. For preserving hidden data, a lossless format like PNG is usually recommended.
Nostr Integration:
The tool uses the Nostr protocol to fetch events and extract hidden messages directly from relays.
By entering a Nostr event ID (HEX, note1, nevent) and optionally relay URLs, the tool connects via WebSockets, fetches the event,
and displays both the original and hidden secret message hidden in the text or emoji.
When pasting in the nevent string the tool will automatically extract and use its relay hints.
Secrets in files are not available with this option. For testing purposes, you can use this event ID:
0001917b7176006a407f4c7d4a9b7408064fee7db0ad8a5b4f0f825bf0321b1b
, or this one and check the image url
note1hxdpv5xcneu6vqacrfg4adjh5n7zvue284fdu64x20ezlh900cqsqpdrdj
Visual effects after successful decoding:
If the decoding of files and messages is successful, you will receive visual feedback.
In some cases, such as when the message includes at the start of the message prefixes
like bitcoin:, cashu, lnbc, monero:, nostr: and others,
it will show a visual effect relevant to the message content. If no special prefixes are included, you'll only see sparkles.
If you have any special visual effects requests, please reach out to me.
Zap the Developer ⚡️
If you find this website valuable, consider contributing a sat or two. Thank you.
letterswiss19@walletofsatoshi.com
bc1q2ytw4gwrkw5jg6ekutcwrgw8x5nlkahyk54l5e
Text Steganography
Encode a Hidden Message
Encoded Message
Decode a Hidden Message
Decoded Output
File Steganography
Encode a secret in a file
Submit either text or a file for encoding, but not both at the same time. Only one object is allowed per submission.