Online Binary Encoder & Decoder
Convert text to binary and decode binary back to text — all in your browser
Paste or type your text into the Input editor. Make sure Encode mode is selected in the toolbar. The tool converts each character into 8-bit binary groups and shows the result in the Output editor.
Use the Copy Output or Save Output button to export the binary string. Binary encoding is commonly used in computer science education to understand how data is represented at the lowest level.
Paste a valid binary string using 0 and 1 characters into the Input editor. Select Decode mode. The decoded text appears in the Output editor if the input is valid 8-bit binary.
If the input length is not a multiple of 8 or contains invalid characters, the status bar will show an error so you can fix it. This validation ensures accurate conversion between binary and text.
Click the Open File icon to load any file from your device. The tool reads the file locally and converts its bytes to binary without uploading anything. You can also decode a binary representation of a file and save the reconstructed file with the Save Output button.
This feature is particularly useful for examining raw file data, understanding binary file structures, or converting binary dumps back into usable files.
- Learning computer science: Understand how characters and bytes map to binary representation at the fundamental level.
- Inspecting raw data: View the exact binary representation of data from files or network payloads.
- Debugging: Represent bytes in debugging logs or technical documentation in human-readable binary form.
- Teaching low-level concepts: Demonstrate binary arithmetic, bit manipulation, and data encoding principles.
Related tools: Hex Encoder/Decoder, Base64 Encoder/Decoder, and ASCII Encoder/Decoder.
This binary encoder and decoder runs entirely in your browser using JavaScript. Your text and files are never uploaded or stored by LeanTul, which makes it suitable for sensitive logs, configuration files, and internal debugging data.
Note: Binary encoding is not a form of encryption. It simply represents data using 0 and 1 digits. Anyone can decode binary strings back to the original content, so never rely on binary encoding for security or privacy.
Does this binary encoder upload my text or files?
No. All binary encoding and decoding happens directly in your browser. Nothing is uploaded or stored.
What format does the binary encoder use?
The tool uses 8-bit binary groups for each byte so that each character is represented by eight 0 or 1 digits.
Can I convert files to binary?
Yes. Use the Open File button to load a file and the tool will convert its bytes to a binary string locally.
Why do I see an error when decoding binary?
If the input contains characters other than 0 or 1, or if the length is not a multiple of 8, the tool cannot decode it and will show an error message in the status bar.
Is binary encoding a form of encryption?
No. Binary is just a representation of data using 0 and 1. It does not provide security or secrecy.