ToolKitImage tools
Base64 Image Encoder
Encode images as Base64 data URIs or decode Base64 strings into previews.
Base64 image encoder
Uploaded file
None
Base64 characters
0
Decoded output
Decode to see output size
How to use the Base64 Image Encoder
This tool converts images into Base64 data URIs and decodes Base64 strings back into a viewable image preview. Encoding an image as a data URI lets you embed it directly inside CSS, HTML or JSON instead of linking to a separate file, while decoding lets you recover and inspect the picture behind a Base64 blob someone has handed you.
Developers use it to inline small icons and logos to save an extra HTTP request, to embed images reliably in HTML emails, and to debug data URIs in stylesheets or API payloads. Having both encoding and decoding in one place means you can move in whichever direction a particular task demands without switching tools.
Encoding and decoding both run in your browser, so the image is never uploaded to a server. There is no install and no account, which keeps the workflow fast and your assets private, even when you are experimenting with graphics you have not yet shipped.
Frequently asked questions
What is a Base64 data URI?
A data URI encodes an image as a Base64 text string so it can be embedded directly in CSS, HTML or JSON instead of linking to a separate file.
Can it decode Base64 back to an image?
Yes. Paste a Base64 string or data URI and it decodes back to a viewable image preview.
When should I inline an image as Base64?
Inlining small icons or logos can save an HTTP request; it is less suited to large images, which become bulky when encoded as Base64.
Are my images uploaded?
No. Encoding and decoding run entirely in your browser — your images never leave your device.