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🔐 Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text. 100% local processing.
Plain Text
Base64
Supports full Unicode (UTF-8). All processing happens locally - nothing is sent to a server.
How This Tool Works
Base64 encoding converts binary data into a text-safe ASCII string format using a 64-character alphabet (A-Z, a-z, 0-9, +, /). It is used to embed images in HTML/CSS, transmit binary data in JSON or XML, encode email attachments (MIME), and pass data through systems that only support text. This tool encodes text to Base64 and decodes Base64 back to text, all in your browser. It is an essential utility for developers working with APIs, data URIs, and any scenario where binary data needs to travel through text-only channels.
💡 Tips & Best Practices
- 1Base64 encoding increases data size by approximately 33% — it trades space for compatibility.
- 2Base64 is NOT encryption — it is a reversible encoding scheme. Never use it to "secure" sensitive data.
- 3Data URIs use Base64: <code>data:image/png;base64,...</code> lets you embed images directly in HTML/CSS without a separate file.
- 4URL-safe Base64 replaces + with - and / with _ to avoid conflicts in URLs.
Frequently Asked Questions
Is Base64 encoding the same as encryption?
No. Base64 is a reversible encoding that anyone can decode. It provides no security whatsoever. For protecting data, use proper encryption (AES, RSA) or hashing (SHA-256). Base64 is purely for format compatibility, not confidentiality.
When would I need Base64 encoding?
Common uses include embedding small images in CSS/HTML (data URIs), sending binary data in JSON API payloads, encoding email attachments (MIME), and storing binary data in text-only databases or configuration files.
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