Base64 Encode / Decode
Convert text and binary data to Base64 and back.
Encoding
Image
Runs offline
Image to Base64
Convert an image to a Base64 data URI for inline embedding.
File
Output
0 charsCtrl↵to run
Questions
Is my image uploaded anywhere?
No. The file is read with the browser's FileReader API and encoded locally. It never leaves your device, which is why this works with the network disconnected.
When is inlining an image a good idea?
For small assets, roughly under 4 KB, where saving a request outweighs the cost. Base64 inflates data by about 33% and inlined images cannot be cached separately from the document, so a large inlined image is downloaded again on every page load.
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