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Encode and decode Base64 instantly with our free online tool. Convert text to Base64 for embedding in code, or decode Base64 strings back to readable text. Supports files, images, and URL-safe encoding.
Base64 is a binary-to-text encoding scheme that converts binary data into ASCII characters. It's essential for embedding images in HTML/CSS, sending binary data in JSON/XML APIs, email attachments (MIME), and storing complex data in URLs or cookies.
Convert text to Base64 and back with a single click.
Drag & drop or select files to encode images, PDFs, and more.
Generate URL-safe Base64 by replacing + with - and / with _.
All processing happens in your browser. Your data never leaves your device.
Yes, completely free with no usage limits, no signup required, and no data uploaded to servers.
Base64 is used to embed images in HTML/CSS (data URIs), send binary data in JSON APIs, encode email attachments (MIME), and store complex data in URLs or cookies.
Standard Base64 uses + and / characters which have special meanings in URLs. URL-safe mode replaces + with - and / with _ so the encoded string can be safely used in URLs without additional encoding.
No, Base64 is an encoding, not encryption. It's easily reversible and provides no security. Use proper encryption for sensitive data.
Base64 encoding increases data size by approximately 33% because it converts 3 bytes of binary data into 4 ASCII characters.