Base64 Text Encoder

Online tool for encoding and decoding UTF-8 text to and from Base64 directly in your browser.

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.

Base64 Text Encoder is a free online tool for encoding plain UTF-8 text into Base64 and decoding Base64 back into readable text. It works with Russian and English text, special characters, Unicode, and emoji. Processing runs locally in your browser and data is not sent to the server.

What it does

Output

Processing

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How to use

Paste text or a Base64 string into the input field.
Choose the mode: Encode, Decode, or Auto.
If needed, enable URL-safe Base64, line wrapping, or whitespace cleanup before decoding.
Copy the result and use it in an API, test payload, configuration, token, or data URI.

More about this tool

This tool encodes plain UTF-8 text into Base64 and decodes Base64 back into readable text. It works correctly with Russian and English text, special characters, Unicode, and emoji. Base64 is often used in development, API requests, test payloads, tokens, configurations, and data URIs. Processing runs locally in your browser without sending entered data to the server.

Runs in the browser
Data is not sent to the server
Supports UTF-8, Cyrillic, and emoji
Includes encode, decode, and auto modes
Supports URL-safe Base64
Can wrap Base64 across lines
No registration required

Frequently Asked Questions

What is Base64?

Base64 is a way to represent text or binary data as a string of safe characters. In this tool, Base64 is used to encode and decode UTF-8 text.

Can I encode Russian text?

Yes. The tool works with UTF-8, so it correctly encodes and decodes Russian text, English text, special characters, and emoji.

What does Auto mode do?

Auto mode tries to detect whether the entered string looks like Base64. If it can be decoded into readable UTF-8 text, the tool shows the decoded result. Otherwise, the text is encoded into Base64.

What is URL-safe Base64?

URL-safe Base64 is a Base64 variant that is safer to use in URLs. In it, "+" and "/" are replaced with "-" and "_", and trailing "=" padding is often removed.

Why does Base64 fail to decode?

The reason may be extra characters, a damaged string, incorrect padding, or text that is not Base64 at all. Try enabling whitespace and line break cleanup before decoding.

Can I use this tool for images?

This tool is intended for text. For images, use the separate Image to Base64 and Base64 to Image tools.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.

More about this tool

Runs in the browser
Data is not sent to the server
Supports UTF-8, Cyrillic, and emoji
Includes encode, decode, and auto modes
Supports URL-safe Base64
Can wrap Base64 across lines
No registration required

Frequently Asked Questions

What is Base64?

Base64 is a way to represent text or binary data as a string of safe characters. In this tool, Base64 is used to encode and decode UTF-8 text.

Can I encode Russian text?

Yes. The tool works with UTF-8, so it correctly encodes and decodes Russian text, English text, special characters, and emoji.

What does Auto mode do?

Auto mode tries to detect whether the entered string looks like Base64. If it can be decoded into readable UTF-8 text, the tool shows the decoded result. Otherwise, the text is encoded into Base64.

What is URL-safe Base64?

URL-safe Base64 is a Base64 variant that is safer to use in URLs. In it, "+" and "/" are replaced with "-" and "_", and trailing "=" padding is often removed.

Why does Base64 fail to decode?

The reason may be extra characters, a damaged string, incorrect padding, or text that is not Base64 at all. Try enabling whitespace and line break cleanup before decoding.

Can I use this tool for images?

This tool is intended for text. For images, use the separate Image to Base64 and Base64 to Image tools.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.