Base64
Convert UTF-8 text into Base64 data or decode Base64 content back into readable text.
Encode · DecodeData Transformation Module
Free Encoder & Decoder
Use the free Encoder & Decoder to convert Base64, Base64 URL, URL encoding, HTML entities, hexadecimal, binary and ROT13 data. All processing takes place locally inside your browser.
Module Status
Active
Data Conversion
Local processing
Encode or decode your data
Select a format and operation, enter your data and convert it instantly without sending information to an external server.
Your data stays private
Input and output data are processed locally inside your browser and are not uploaded.
Source Data
Plain Text
Converted Data
Encoded Text
Format:
Base64
Operation:
Encode
Time:
0 ms
Supported Formats
Available transformations
Choose the format that matches the data you need to inspect, transmit or transform.
URL Encoding
Safely represent reserved characters inside URLs, parameters and web requests.
Encode · DecodeHTML Entities
Convert special HTML characters into entities or restore entities to their original characters.
Encode · DecodeHexadecimal
Represent text as hexadecimal byte values or translate hexadecimal data back into text.
Encode · DecodeBinary
Convert text into binary byte sequences or decode binary values into readable text.
Encode · DecodeROT13
Apply the ROT13 letter substitution transformation to text and reverse it using the same operation.
TransformAbout Encoder & Decoder
Learn how ThreatHawk transforms text and data across multiple encoding formats while keeping all processing inside your browser.
Key Features
Explore Base64, URL encoding, HTML entities, Hex, Binary, ROT13, UTF-8 support, copy, swap and download tools.
How Data Conversion Works
Understand how input is validated, converted into the selected format and returned as readable or encoded output.
Common Questions
Frequently Asked Questions
Find answers about supported formats, privacy, UTF-8 handling, reversible transformations and the difference between encoding and encryption.
Is my input uploaded to ThreatHawk?
No. Encoder & Decoder processes input and output locally inside your browser. ThreatHawk does not intentionally upload, store or transmit the data you convert.
Which formats are supported?
The module currently supports Base64, Base64 URL, URL encoding, HTML entities, hexadecimal, binary and ROT13. Each format can be selected from the format menu before running the conversion.
What is the difference between encoding and encryption?
Encoding changes data into another representation so it can be transmitted, stored or interpreted correctly. It is normally reversible without a secret key. Encryption is designed to protect confidentiality and requires the proper cryptographic key to recover the original data.
Does the tool support UTF-8 characters?
Yes. The converter is designed to handle UTF-8 text, including ordinary letters, symbols and international characters. Some malformed encoded input may still produce an error if it cannot be decoded into valid text.
What is Base64 URL encoding?
Base64 URL is a URL-safe variation of Base64. It replaces characters that may cause problems inside URLs and often removes trailing padding characters, making the output more suitable for web tokens, parameters and identifiers.
Why does decoded output sometimes fail?
Decoding may fail when the submitted value contains invalid characters, incorrect spacing, missing data, malformed byte groups or content that does not match the selected format. Check that the chosen operation and format match the input.
Can I swap the output back into the input?
Yes. The Swap button moves the current output into the input panel and changes the operation where appropriate, allowing you to reverse or continue a transformation without copying the value manually.
Can I copy or download the converted result?
Yes. After a successful conversion, you can copy the result to your clipboard or download it as a local file for later use.
Is ROT13 secure?
No. ROT13 is a simple letter-substitution transformation and can be reversed by applying the same operation again. It is useful for obscuring text casually, not for protecting passwords, confidential files or sensitive communications.
Can this tool detect whether encoded data is malicious?
No. Encoder & Decoder only transforms data between supported representations. It does not determine whether decoded content is safe, trustworthy or malicious. Review unknown output carefully before opening links, scripts or files derived from it.