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Image to Base64 Converter
Get a Base64 data URI for any image, with one-click copies as a raw string, an <img> tag or a CSS background-image.
Why use this tool
When Base64 makes sense
Inlining tiny images (icons, 1×1 pixels, small logos) saves an HTTP request. For anything over ~10 KB a normal file is faster, because Base64 is ~33% bigger and can't be cached separately.
Exactly your bytes
The image isn't re-encoded — the data URI contains your original file byte-for-byte, so quality is untouched.
How to convert an image to Base64
- Upload — drop or pick an image.
- Copy — choose raw Base64, data URI, HTML tag or CSS.
- Paste — into your HTML, CSS, JSON or code.
Frequently asked questions
Why is the output bigger than my file?
Base64 represents every 3 bytes as 4 characters, so it's always about 33% larger. That's inherent to the encoding.
Is there a size limit?
No hard limit, but very large images produce very large strings that are awkward to paste. Keep inlined images small.
Is this tool free?
Yes — every tool on ConvertPicto is completely free, with no account, no watermark and no file limits. The site is supported by ads.
Are my images uploaded to a server?
No. ConvertPicto runs entirely inside your browser using the Canvas API. Your files are read locally, processed on your device and never sent anywhere — we don't even have a server that could receive them.
Does it work on my phone?
Yes. The site is fully responsive and works in any modern mobile browser (Chrome, Safari, Firefox, Edge). Processing large images is naturally slower on a phone than on a laptop.