Base64 turns binary data into plain text so it can travel through systems that only accept characters. This tool encodes and decodes it, and converts images into embeddable data URIs.
Base64 is a way of representing binary data using 64 printable characters. It is not encryption — anyone can decode it instantly — but it solves a real transport problem: email bodies, JSON payloads, HTML attributes and some APIs cannot carry raw bytes, and Base64 makes them portable as text.
The most common everyday use is the data URI: encoding a small image into a string you can paste directly into HTML or CSS, removing an extra HTTP request. It is ideal for tiny icons but counterproductive for large images, because Base64 inflates size by roughly 33% and cannot be cached separately.
The tool handles both text and file input, in both directions.
| Registration | Not required |
|---|---|
| Watermark | None |
| Cost | Free |
| Directions | Encode and decode |
| Input types | Text and files (including images) |
| Image output | Data URI ready for HTML/CSS |
| Size overhead | Approximately 33% larger than the original binary |
| Processing | Browser-side |
Check before you rely on it: free quotas, file limits and pricing change frequently. Confirm current terms on the official site before depending on it for regular work.
Developers embedding small images in HTML or CSS, debugging API payloads, and anyone who has received a Base64 string and needs to see what is inside it.
No. It is an encoding for transport, reversible by anyone instantly. Never use it to protect data.
Yes, encoding and decoding are free with no registration.
About 33% larger than the original binary, which is why it is best reserved for small assets.
No. It bloats the file and prevents separate caching. Use it for small icons only.
Yes, the decode direction restores the original file.
A string like data:image/png;base64,... that you can use directly as an image source in HTML or CSS, avoiding an extra network request.