How do you convert a PNG to Base64?
Drop your PNG into the tool above and copy the output. You get two forms: a full data URI (beginning data:image/png;base64,) that you can paste straight into an <img src> or CSS background-image, and the raw Base64 without the prefix for when you need just the encoded bytes.
Why encode a PNG as Base64?
Base64 lets you embed an image directly inside HTML, CSS, JSON, or a data file, so it travels as text with no separate file to host or request. That's handy for small icons and logos (it saves an extra HTTP request), for inlining images in emails or single-file documents, and for storing an image in a database or config.
Does Base64 make the image bigger?
Yes — Base64 encoding adds roughly 33% to the size because it represents binary data using a limited set of text characters. That's why it's best for small images: inlining a tiny icon avoids a network request and is a net win, but encoding a large photo bloats your HTML or CSS. Compress the PNG first if size matters.
Is this tool free and private?
Yes. It's completely free with no signup, and the encoding happens entirely on your device — your image is never uploaded.
Frequently asked questions
- What's the difference between the data URI and raw Base64?
- The data URI includes the data:image/png;base64, prefix so a browser knows it's a PNG; the raw Base64 is just the encoded bytes, for when your code adds its own prefix.
- Can I use the result directly in an img tag?
- Yes. Paste the full data URI into an <img src> or a CSS background-image and the image displays with no separate file.
- Should I Base64-encode large images?
- Generally no. Base64 adds about a third to the size and can't be cached separately, so it's best for small icons and logos.
- Do you upload my image?
- No. Encoding happens in your browser — your file is never uploaded, stored, or seen by us.