ToolsBase64 Converter
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Encode text, strings, and binary data to Base64 format or decode Base64 back to clean UTF-8 text with instant conversion and multi-line support.
100% Client-Side Privacy
Tokens, code & payloads never leave your browser.
Zero Latency Execution
Instant processing via native browser Web APIs.
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Unlimited, free access without paywalls or quotas.
Choose "Encode" to convert raw text to Base64 or "Decode" to extract text from Base64.
Type or paste your input into the editor area.
Click "Copy" to instantly use your encoded or decoded payload in headers, emails, or data URIs.
Encode `username:password` pairs into Base64 format for HTTP `Authorization: Basic <base64>` header configurations.
// Basic Auth Header Example
// Raw: admin:secret123
// Base64 Encoded: YWRtaW46c2VjcmV0MTIz
Authorization: Basic YWRtaW46c2VjcmV0MTIzEncode small SVG icons, fonts, or assets into Base64 strings to eliminate extra HTTP network roundtrips in CSS stylesheets.
No. Base64 is an encoding algorithm designed to represent binary data in an ASCII string format. It provides zero security or confidentiality and can be decoded by anyone.
Base64 represents 3 bytes of binary data using 4 ASCII characters (a 33% increase in size). This overhead is necessary to ensure safe transmission across text-only protocols like SMTP and HTTP.
Learn engineering best practices, design patterns, and code architecture related to this tool.