Base64 Encoder Online
Encode any text to Base64 format instantly. Supports full UTF-8 and Unicode characters. All encoding happens in your browser — nothing is sent to a server.
What is Base64 encoding?
Base64 encoding converts binary data into a text format using 64 ASCII characters (A-Z, a-z, 0-9, +, /). It is used to safely transmit binary data through text-based protocols like email (MIME), JSON, XML, and URL query parameters. The encoded output is approximately 33% larger than the original.
When to use Base64 encoding
Base64 is commonly used for: embedding images in HTML/CSS (data URIs), sending binary data in JSON APIs, email attachments (MIME encoding), storing binary data in text-based databases, and passing data through URL parameters. It is not encryption — Base64 is fully reversible and provides no security.
Frequently Asked Questions
Is Base64 encoding the same as encryption?
No. Base64 is an encoding scheme, not encryption. Anyone can decode Base64 without a key. It is designed for data transport, not security.
Why does Base64 increase file size?
Base64 represents 3 bytes of data using 4 ASCII characters, resulting in ~33% size increase. This is the trade-off for text-safe transport.
Related Convert Tools
OpenAPI to TypeScript
Convert OpenAPI 3.x and Swagger 2.0 specs to TypeScript interfaces and types with $ref resolution, allOf/oneOf/anyOf, enums, and API operation types
JSON to Zod Converter
Convert JSON or JSON Schema to Zod validation schemas with $ref resolution, allOf/oneOf/anyOf, enum, format constraints, and required/optional fields
GraphQL to TypeScript
Convert GraphQL SDL schemas to TypeScript interfaces, types, enums, unions, and operations
TypeScript to JavaScript
Convert TypeScript to JavaScript — strip types, interfaces, enums, generics, and access modifiers to get clean JS output