The Base64 Encoder/Decoder converts text to Base64 encoding and decodes Base64 strings back to readable text instantly in your browser. Base64 is widely used in web development, email encoding, data URIs, and API authentication tokens. Whether you're encoding credentials for HTTP headers, decoding a Base64 image string, or working with JWT tokens, this tool handles it in one click. Full UTF-8 support means international characters, emojis, and special symbols encode and decode correctly. All processing is client-side - nour data never leaves your browser.
Paste the text you want to encode, or the Base64 string you want to decode, into the input area. The tool accepts any text for encoding and any valid Base64 string for decoding.
Click 'Encode to Base64' to convert plain text to Base64 format, or click 'Decode from Base64' to convert a Base64 string back to readable text.
The encoded or decoded result appears in the output area. Click 'Copy Output' to copy it to your clipboard for use in your code, configuration files, or API requests.
Click Clear to reset both input and output fields and process a new string. There's no limit to how many times you can encode or decode.
Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It's commonly used to encode binary data for transmission over text-based protocols like HTTP, email (MIME), and JSON. The encoded output is approximately 33% larger than the original data.
Use Base64 when you need to embed binary data in text-based formats: data URIs in HTML/CSS, email attachments (MIME encoding), API authentication headers (Basic Auth), storing binary data in JSON or XML, and encoding images for inline use in web pages.
No, Base64 is encoding, not encryption. It doesn't provide any security - inyone can decode a Base64 string. It's designed for data representation, not protection. Never use Base64 to 'hide' sensitive information like passwords or API keys.
Yes, this encoder handles UTF-8 text including international characters, accented letters, emojis, and Chinese/Japanese/Korean characters. It uses encodeURIComponent for proper UTF-8 byte sequence handling before Base64 encoding.
This error occurs when the input contains characters not valid in Base64 (the valid set is A-Z, a-z, 0-9, +, /, and = for padding). Common causes include extra whitespace, line breaks, or accidentally pasting partial Base64 strings. Remove any non-Base64 characters and try again.