Image to Base64 Converter
Turn an image into a Base64 data URI you can paste straight into HTML or CSS, and decode one back into a file.
Why embed an image as text
Base64 encoding rewrites an image as a long string of text that a browser can read as if it were a file. Pasted into an <img> tag or a CSS background, it lets a small icon or logo travel inside the HTML itself — no separate file, no extra network request. That's genuinely handy for tiny assets, email templates, and self-contained snippets.
Decoding does the reverse: paste in a data URI and get the original image file back, which is useful when you've found one embedded in some code and want to pull it out.
When not to reach for it
Base64 isn't free. The encoded text is roughly a third larger than the original file, and unlike a normal image it can't be cached separately by the browser. So it's a great fit for a 2 KB icon and a poor one for a full-size photo — for anything sizeable, a plain linked file is lighter and faster.
How to convert an image to Base64
- Add the image.
- It is encoded into a Base64 data URI.
- Copy the string, or the ready-made CSS or HTML snippet.
When embedding beats linking
Base64 turns a picture into a long line of text you can paste directly into HTML, CSS, JSON or an email template. Because the image travels inside the file itself, there is no separate request and no broken-image risk if the file moves — handy for tiny icons, email signatures and single-file demos.
The trade-off is size: Base64 is about a third larger than the original binary, and browsers cannot cache it separately. Keep it for small assets and link to real files for anything substantial.
Image to Base64 Converter FAQ
What is a data URI?
A way of embedding a whole file inside a text string, so an image can live directly in your HTML or CSS instead of being fetched separately.
Why is the Base64 bigger than my image?
Encoding binary data as text adds roughly 33% overhead. That is the cost of embedding it inline.
When should I not use Base64?
For large images or anything reused across pages — a normal file the browser can cache is faster.
What can I do with a Base64 image string?
Paste it into an HTML img tag or a CSS background to embed the image directly, with no separate file to host or load.
Why is the Base64 version bigger than my file?
Encoding to text adds roughly a third to the size. That's the trade-off for embedding it inline, which is why it suits small images best.
Can I convert a Base64 string back into an image?
Yes. Paste the data URI in and the tool decodes it back into the original image file.