What is Base64 Encoder/Decoder?

Base64 Encoder/Decoder is a free online tool. Base64 encoding and decoding with UTF-8 support No signup required - use it directly in your browser.

Is Base64 Encoder/Decoder free?

Yes, all tools provided by WebTools are completely free to use with no signup required.

Is Base64 Encoder/Decoder safe?

Absolutely safe. All data processing happens locally in your browser. Nothing is uploaded to any server, ensuring your privacy is fully protected.

Do I need to install software to use Base64 Encoder/Decoder?

No installation needed. All tools run in your browser - just open the page and start using them immediately.

Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It's commonly used to encode data for transmission over media designed to handle text, such as email or JSON.

Why do we use Base64 encoding?

Base64 encoding is used to safely transmit binary data through text-based systems like email (MIME), HTML (data URLs), and JSON APIs. It ensures that binary data survives transport through systems that may not handle raw bytes correctly.

Does Base64 encoding encrypt data?

No. Base64 is an encoding scheme, not encryption. It transforms data into a different format but does not provide any security. Anyone can decode Base64 — never use it to protect sensitive information.

Does this tool support UTF-8?

Yes. This tool fully supports UTF-8 encoding, so you can encode and decode text in any language including Chinese, Japanese, Korean, Arabic, and emojis.

How much does Base64 encoding increase file size?

Base64 encoding increases data size by approximately 33%. For every 3 bytes of input, Base64 produces 4 bytes of output. This overhead is the trade-off for making binary data text-safe.

Base64 Encoder/Decoder

Base64 Encoder/Decoder is a free online tool that helps you encode text to Base64 format and decode Base64 strings back to readable text. It supports full UTF-8 encoding, making it perfect for international characters, binary data, and data URL generation — no signup, no installation, completely private.

Auto

Original Text

Drop file

0 chars

Base64 String

Base64 Encoding Guide

Encode: Convert text to Base64 format, commonly used for transmitting binary data in text protocols.

Decode: Convert Base64 string back to original text.

Image Mode: Support image-to-Base64 conversion with optional Data URI prefix.

UTF-8 SupportImage Base64

What is Base64 Encoding?

Encode plain text to Base64 format instantly
Decode Base64 strings back to readable text
Full UTF-8 support for international characters and emojis
Real-time encoding and decoding as you type
One-click copy results to clipboard
Support for data URL generation (data:image/png;base64,...)
All processing happens locally in your browser — your data never leaves your device

How to Use Base64 Encoder/Decoder

1
Choose encode or decode
Select "Encode" to convert text to Base64, or "Decode" to convert Base64 back to text.
2
Enter your data
Type or paste your text (for encoding) or Base64 string (for decoding) into the input box.
3
Get instant results
The result appears automatically in the output panel as you type.
4
Copy the output
Click the copy icon to copy the encoded or decoded result to your clipboard.

Frequently Asked Questions

Related Encoding Tools

URL Encoder/Decoder Image to Base64 Hash Generator HTML Entity Encoder JWT Decoder Text Encrypt/Decrypt

Base64 Encoder/Decoder

What is Base64 Encoding?

Encode plain text to Base64 format instantly

Decode Base64 strings back to readable text

Full UTF-8 support for international characters and emojis

Real-time encoding and decoding as you type

One-click copy results to clipboard

Support for data URL generation (data:image/png;base64,...)

All processing happens locally in your browser — your data never leaves your device

How to Use Base64 Encoder/Decoder

Choose encode or decode

Select "Encode" to convert text to Base64, or "Decode" to convert Base64 back to text.

Enter your data

Type or paste your text (for encoding) or Base64 string (for decoding) into the input box.

Get instant results

The result appears automatically in the output panel as you type.

Copy the output

Click the copy icon to copy the encoded or decoded result to your clipboard.