Base64 Encoder & Decoder
Convert UTF-8 text into Base64 data or decode Base64 content back into readable text.
Learn about Base64 → Encode · DecodeData Transformation Module
Free Base64, URL, Hex & Binary Encoder Decoder
Encode or decode Base64, Base64 URL, URL-encoded data, HTML entities, hexadecimal, binary and ROT13 directly in your browser. ThreatHawk processes all conversions locally for privacy and speed.
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.
Transform
Base64 Guide
Free Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back into readable text using ThreatHawk's browser-based Encoder & Decoder. All conversions are processed locally inside your browser.
What is Base64?
Base64 is an encoding method that represents binary or text data using a set of ASCII characters. It is commonly used when data needs to be safely included in text-based formats such as web requests, configuration files, email content and APIs.
Base64 is an encoding format, not an encryption method. Anyone with a Base64 decoder can recover the original content.
How to Encode Text to Base64
- Select Base64 from the format menu.
- Select Encode as the operation.
- Enter or paste your text into the Source Data field.
- Click Convert Data.
- Copy or download the generated Base64 result.
How to Decode Base64
- Select Base64 as the format.
- Choose Decode.
- Paste the Base64 value into the Source Data field.
- Click Convert Data.
- Review the decoded result before using unknown content.
Base64 Encoding Example
Plain text
Hello ThreatHawk
Base64
SGVsbG8gVGhyZWF0SGF3aw==
Base64 and UTF-8
ThreatHawk's converter supports UTF-8 text, allowing Base64 conversion of standard text, symbols and international characters.
UTF-8 text is first represented as bytes before those bytes are converted into Base64 characters.
Common Base64 Decoding Errors
Base64 decoding can fail when the input contains invalid characters, incorrect padding, missing data or content that is not actually Base64 encoded.
If decoding fails, verify that Base64 and Decode are selected and check the submitted value for accidental spaces or incomplete data.
Base64 is not encryption
Base64 does not protect confidential information. It only changes how data is represented and can be reversed without a password or cryptographic key. Do not use Base64 as a security mechanism for passwords, credentials or sensitive information.
About 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.
How do I encode text to Base64?
Select Base64 from the format menu, choose Encode, enter or paste your text into the Source Data field and click Convert Data. ThreatHawk will generate the Base64 representation locally inside your browser without uploading the input.
How do I decode Base64 into readable text?
Select Base64 as the format, choose Decode, paste the Base64 value into the Source Data field and click Convert Data. If the submitted value is valid Base64, the decoded text will appear in the output panel.
How do I convert hexadecimal to text?
Select Hexadecimal from the format menu, choose Decode, paste the hexadecimal value into the Source Data field and click Convert Data. Valid hexadecimal byte values will be converted back into readable text.
How do I convert text to hexadecimal?
Select Hexadecimal from the format menu, choose Encode, enter or paste your text into the Source Data field and click Convert Data. ThreatHawk will convert the text into hexadecimal byte values locally inside your browser.
How do I convert binary to text?
Select Binary from the format menu, choose Decode, paste the binary value into the Source Data field and click Convert Data. Valid binary byte values will be converted back into readable text.
How do I convert text to binary?
Select Binary from the format menu, choose Encode, enter or paste your text into the Source Data field and click Convert Data. ThreatHawk will convert the text into binary byte values locally inside your browser.
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.