100% in-browser -- nothing is uploaded
Image to Base64 online — free & private
Encode an image into a Base64 data URI for CSS, HTML, and scripts. Your file never leaves your device.
- No upload
- Sign in to download
- Free
What is image to base64?
Base64 encodes binary data as text. An image encoded as a data URI can be embedded directly in HTML, CSS, or JSON — no separate file request needed. This is handy for prototypes, email signatures, and single-file tools.
The encoding happens entirely in your browser, so sensitive assets never touch a server.
How to image to base64
- Drop or click to choose an image.
- The full data URI appears with size statistics.
- Copy it, or download it as a .txt file.
Frequently asked questions
Why is the encoded text so long?
Base64 adds roughly 33% overhead — that's inherent to the format.
Can I use this for CSS backgrounds?
Yes. Paste the data URI directly into a `url(...)` or an `<img src>`.
Is there a size limit?
We accept files up to 20 MB to keep the browser responsive.
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