Image to Base64 Converter

Base64 turns arbitrary binary data — like an image's raw bytes — into plain text made up of only letters, digits, and a couple of symbols. That's useful anywhere binary data needs to travel through a text-only channel: embedded directly in CSS (background-image: url(data:image/png;base64,...)), inlined in HTML, or stored in a JSON field, all without a separate file request.

The cost is size: base64 text is about a third larger than the binary it represents, because it spends 8 bits of text to represent 6 bits of the original data. That trade-off usually makes sense for small icons and inline assets, and rarely makes sense for full-size photos, where the extra size and losing browser caching (the data is baked into the page itself, not fetched separately) outweigh the convenience. Everything here runs locally in your browser — nothing you upload or paste is sent anywhere.

• •Reserve base64-embedded images for small, single-use assets (icons, tiny UI graphics) — a browser can't cache an inline data URI separately from the page that contains it, unlike a normal image file.
• •A full data URI (data:image/png;base64,...) is what CSS and HTML expect directly; the raw base64 (no prefix) is what most APIs and JSON payloads expect — this tool gives you both so you don't have to strip or add the prefix by hand.
• •If a pasted base64 string fails to render, check that it wasn't truncated — a common cause is copying from a source that cuts off long text, silently producing an incomplete (and undecodable) string.
• •When pasting raw base64 without a data: prefix, make sure the MIME type you select actually matches the original image format — a PNG's bytes decoded as a JPEG (or vice versa) simply won't render.