TBCD Decoder

Decode Telephony Binary Coded Decimal (TBCD) encoded data into readable text with this free online tool.

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6,540+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

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Worked Example & Common Values

Below is a sample worked calculation demonstrating how TBCD Decoder processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

The TBCD Decoder Online tool allows you to convert Telephony Binary Coded Decimal (TBCD) encoded data, commonly used in mobile networks and telecommunication systems, into human-readable ASCII or GSM characters. TBCD encoding represents digits and some special characters in a semi-octet format, where each byte contains two digits (nibbles swapped). This tool supports both manual input of TBCD strings and file uploads (.txt files), providing instant decoding with error handling for invalid inputs. It's ideal for network engineers, developers, and students working with telecom protocols.

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How to Use

Enter TBCD-encoded data in the text area (e.g., '21 43 65' or '214365') or upload a .txt file containing TBCD data.
Click the 'Decode TBCD' button to process the input.
View the decoded text result displayed below, along with the original input for verification.
Use the 'Clear' button to reset the form and start over.

Frequently Asked Questions

Find Quick Answers

What is TBCD encoding?

Telephony Binary Coded Decimal (TBCD) is an encoding scheme used in mobile networks to represent digits and some special characters. It stores two digits per byte with nibble swapping (e.g., digit '1' followed by '2' is encoded as 0x21).

What characters can be decoded?

This tool decodes TBCD to ASCII/GSM characters, supporting digits 0-9, letters (with some limitations), and symbols like *, #, and + based on standard GSM 03.38 encoding.

Can I upload files for decoding?

Yes, you can upload .txt files containing TBCD data. The tool will read the file content and decode it automatically.

What if my input is invalid?

The tool validates input for proper TBCD format (hex digits, spaces allowed) and displays specific error messages highlighting issues for correction.

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