🔢 Base64 Encoder / Decoder
Encode text or files to Base64, or decode Base64 strings back to plain text. Supports image files for inline CSS/HTML embedding.
Supports images, PDF, text, JSON, CSV (max 5MB)
When to Use Base64 Encoding
Base64 encoding converts binary data (like images) into ASCII text so it can be safely transmitted in environments that only support text — like JSON APIs, email bodies, HTML attributes, and CSS data URIs. A common use case is embedding small images directly in CSS or HTML to eliminate an HTTP request.
Note that Base64 increases file size by approximately 33%, so it's best suited for small images (icons, logos under 5KB). Larger images should be served as regular files. Base64 is encoding, not encryption — it provides no security.