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Base64 Encoder
Base64 EncoderReady
Input Plain Text / Data
0 lines · 0 B
Raw input remains untouched until you click Format
Encoded Base64 OutputEditable
0 lines · 0 B
Ready to copy (⌘⇧C) or download (⌘S)

Base64 Encoder

Encode plain text, UTF-8 strings, and binary data to Base64 format online. Fast client-side Base64 string encoding with URL-safe option.

UTF-8 full charset support
URL-safe Base64 toggle
Instant live encoding
Copy & Download
Step-by-Step Guide

How to Use Base64 Encoder Online

Follow these quick steps to process your data online directly in your browser with zero latency and 100% privacy.

1
Step 1Encodes UTF-8 string into byte array using TextEncoder.
2
Step 2Converts binary octets into 6-bit chunks mapped to the 64-character ASCII table (A-Z, a-z, 0-9, +, /).
3
Step 3Appends = padding characters to align to 4-byte boundaries.
Demonstration

Example Input & Output

Converts UTF-8 text into standard RFC 4648 Base64 radix-64 ASCII representation.

Input Plain Text / Data
Hello World! Welcome to DataFormatTools.
Encoded Base64 Output
SGVsbG8gV29ybGQhIFdlbGNvbWUgdG8gRGF0YUZvcm1hdFRvb2xzLg==
Applications

Common Use Cases

Data URIs & Inline Media

Embed small SVGs, icons, or fonts directly into CSS and HTML files.

API Authentication Headers

Create Basic Authentication header credentials (username:password).

Guidelines

Specifications & Gotchas

UTF-8 Multi-byte Characters

Standard atob/btoa without UTF-8 byte conversion corrupts emojis and accented characters.

Knowledge

Frequently Asked Questions

Is Base64 an encryption algorithm?

No. Base64 is an encoding scheme for data transmission, not encryption.

Does this tool support emojis and non-English text?

Yes, our encoder uses UTF-8 byte streams, preserving all Unicode characters and emojis.

Workflow

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