Why it gets larger
Base64 represents binary data as text and is usually about one third larger before transport compression.
Developer · Free, no signup
Convert an image to Base64
Your image stays in this browser. Generate a raw string or paste-ready code without uploading the file.
- No watermark
- Stays in your browser
- Real quality controls
Choose an image
Converted locally in this browser
Browser-only tool. The image or Base64 value is not uploaded.
Three clean steps
Get the result, then get on with it
The workspace keeps choices close to the file. Explanations stay down here.
- Choose or drop one image.
- Select the output wrapper.
- Copy or download the encoded text.
Worth knowing
Convert an image to Base64, with the tradeoffs visible
Browser-only
This tool does not call the processing API. Network tests enforce that boundary.
Solve the whole problem
Useful guides for this tool
01
Base64 images explained
Learn what Base64 is, why it adds overhead, when Data URIs help, and when normal image files are better.
Read and use the tool ↗02How to embed a Base64 image in HTML or CSS
Create a Data URI, place it in HTML or CSS, and know when a normal image URL is the better choice.
Read and use the tool ↗03How to decode Base64 to an image safely
Normalize a Base64 value, detect the real image type from bytes, preview it safely, and download the result.
Read and use the tool ↗04The best image format for the web
Choose image formats by content, compatibility, alpha, animation, and performance rather than fashion.
Read and use the tool ↗05Image optimization for Core Web Vitals
Improve image loading with responsive dimensions, stable layout space, compression, priority, and measured page testing.
Read and use the tool ↗