Hex Encoder

Online tool for encoding UTF-8 text to hex bytes and decoding hex back to text.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

Hex Encoder is a free online tool for converting UTF-8 text to hexadecimal byte representation and back. Processing runs locally in your browser.

What it does

Output

Processing

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How to use

Choose mode: Text to Hex, Hex to Text, or Hex to Bytes preview.
Paste text or hex string into the input field.
Configure hex case, byte separator, and decoding rules.
Copy the result for API debugging, binary protocols, webhooks, logs, payloads, or dev tasks.

More about this tool

Hex encode/decode converts UTF-8 text to hexadecimal byte representation and back.

Useful for debugging binary protocols, API payloads, webhooks, logs, tokens, byte strings, and low-level diagnostics. Choose hex case, byte separator, spaced format, 0x prefix or \x prefix, and decode hex back to UTF-8 text.

When decoding, spaces and line breaks can be ignored and invalid hex characters show as errors.

Processing runs locally in your browser.

Encodes UTF-8 text to hex
Decodes hex back to text
Configurable case and separators
Supports 0x and \x prefix formats
Useful for API, protocols, logs, and debugging
Runs in the browser
Data is not sent to the server
No registration required

Frequently Asked Questions

What is hex encoding?

Hex encoding represents bytes as hexadecimal digits. Each byte is written as two characters from 00 to ff.

How does text become hex?

Text is first encoded to UTF-8 bytes, then each byte is converted to two hex characters.

Why does Unicode text use more bytes?

In UTF-8, many non-ASCII characters use more than one byte, so the hex string is longer than the character count.

Can hex with spaces be decoded?

Yes. The tool can ignore spaces, tabs, and line breaks when decoding if the corresponding setting is enabled.

What do 0x or \x before bytes mean?

These are common ways to write hex bytes in code and docs. For example, 0x48 or \x48 means byte 48 hex.

Why does odd-length hex error appear?

One byte is two hex characters. After removing separators, the hex character count must be even.

Is hex encryption?

No. Hex is only byte representation. It decodes easily and does not protect data.

How is hex different from Base64?

Hex uses two characters per byte and is good for byte debugging. Base64 is usually shorter and common for sending binary data as text.

Is my data sent to the server?

No. Processing runs locally in your browser and data is not sent to the server.

Do I need to register?

No. The tool works without registration.

More about this tool

Hex encode/decode converts UTF-8 text to hexadecimal byte representation and back.

When decoding, spaces and line breaks can be ignored and invalid hex characters show as errors.

Processing runs locally in your browser.

Encodes UTF-8 text to hex
Decodes hex back to text
Configurable case and separators
Supports 0x and \x prefix formats
Useful for API, protocols, logs, and debugging
Runs in the browser
Data is not sent to the server
No registration required

Frequently Asked Questions

What is hex encoding?

Hex encoding represents bytes as hexadecimal digits. Each byte is written as two characters from 00 to ff.

How does text become hex?

Text is first encoded to UTF-8 bytes, then each byte is converted to two hex characters.

Why does Unicode text use more bytes?

In UTF-8, many non-ASCII characters use more than one byte, so the hex string is longer than the character count.

Can hex with spaces be decoded?

Yes. The tool can ignore spaces, tabs, and line breaks when decoding if the corresponding setting is enabled.

What do 0x or \x before bytes mean?

These are common ways to write hex bytes in code and docs. For example, 0x48 or \x48 means byte 48 hex.

Why does odd-length hex error appear?

One byte is two hex characters. After removing separators, the hex character count must be even.

Is hex encryption?

No. Hex is only byte representation. It decodes easily and does not protect data.

How is hex different from Base64?

Hex uses two characters per byte and is good for byte debugging. Base64 is usually shorter and common for sending binary data as text.

Is my data sent to the server?

No. Processing runs locally in your browser and data is not sent to the server.

Do I need to register?

No. The tool works without registration.