What is Base64 encoding?

Base64 is an encoding scheme that converts binary or text data into a set of 64 ASCII characters. It's commonly used for embedding data in URLs, HTML, CSS, email, and JWT tokens.

Is Base64 the same as encryption?

No. Base64 is encoding, not encryption. It can be decoded by anyone without a key. Never use it to protect sensitive or confidential data.

Does it support Unicode and emojis?

Yes, this encoder handles the full Unicode range including emojis, CJK characters, Arabic, and all other non-Latin scripts.

Where is Base64 commonly used?

Base64 is used in data URLs (images in CSS/HTML), JWT tokens, SMTP email attachments, HTTP Basic Authentication headers, and storing binary data in JSON.

What is the size overhead of Base64?

Base64 encoding increases data size by approximately 33%, since every 3 bytes of input becomes 4 ASCII characters.

Base64 Encode Online

Encode any text to Base64 format instantly. Free, fast, and runs entirely in your browser — your data never leaves your device.

Input Text

What is Base64 Encode?

Base64 is a binary-to-text encoding scheme that converts arbitrary data into a string of 64 printable ASCII characters. It was originally designed to safely transport binary data (like images or files) through text-based protocols such as email (SMTP) that couldn't handle raw binary. Today, Base64 is used everywhere in web development — from encoding images as data URLs, to JWT tokens, HTTP Basic Auth headers, and storing binary data in JSON payloads.

Base64 encoding works by taking 3 bytes of input at a time and splitting them into four 6-bit groups, each mapped to one of 64 characters (A–Z, a–z, 0–9, +, /). The result is always a multiple of 4 characters, padded with = signs if needed. This means every 3 bytes becomes 4 characters — a 33% size increase, which is the trade-off for text-safe encoding.

Important: Base64 is encoding, not encryption. Anyone can decode it without a key. Never use Base64 to secure sensitive information — use proper encryption algorithms instead.

How to Use

1
Enter your text
Type or paste the text you want to convert into the input field.
2
Click Encode
Press the "Encode to Base64" button to convert your text instantly.
3
Copy the result
Click the Copy button to copy the Base64 string to your clipboard.

Features

Encode any text to Base64 format
Supports Unicode, emojis, and special characters
Instant encoding with no delays
Works entirely in your browser
No data sent to any server
Free with no limits or sign-up

Frequently Asked Questions

QWhat is Base64 encoding?: Base64 is an encoding scheme that converts binary or text data into a set of 64 ASCII characters. It's commonly used for embedding data in URLs, HTML, CSS, email, and JWT tokens.
QIs Base64 the same as encryption?: No. Base64 is encoding, not encryption. It can be decoded by anyone without a key. Never use it to protect sensitive or confidential data.
QDoes it support Unicode and emojis?: Yes, this encoder handles the full Unicode range including emojis, CJK characters, Arabic, and all other non-Latin scripts.
QWhere is Base64 commonly used?: Base64 is used in data URLs (images in CSS/HTML), JWT tokens, SMTP email attachments, HTTP Basic Authentication headers, and storing binary data in JSON.
QWhat is the size overhead of Base64?: Base64 encoding increases data size by approximately 33%, since every 3 bytes of input becomes 4 ASCII characters.