Free Tool
Base64 Encoder & Decoder
Encode and decode Base64 text, and convert images to Base64 data URIs. Fast, free, and runs entirely in your browser. No signup.
Text ↔ Base64
Result
Image → Base64 Data URI
Data URI
Why It Matters
Encode and Decode Base64 Instantly
Base64 encoding turns data — text or images — into a plain-text string that can be safely embedded in code, sent in APIs, or included directly in HTML and CSS. Developers use it constantly.
Converting a small image to a Base64 data URI lets you embed it straight into your stylesheet or markup, saving an extra network request. This tool handles both text and image encoding entirely in your browser.
FAQ
Questions About This Tool
It encodes binary or text data into a safe plain-text format, commonly used for embedding images in CSS/HTML, sending data in APIs, and encoding email attachments.
No. Base64 makes files about 33% larger, so it's best for small images like icons. Large images are better served as normal image files.
Yes. All encoding and decoding happens in your browser — nothing you enter or upload is sent to any server.
The input probably wasn't valid Base64. Make sure you've pasted a complete, correctly-formatted Base64 string with no missing characters.
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