Convert · Browser-first processing
Use encode mode for HTML/CSS embedding or decode mode to inspect and save a valid image data string.
Select a supported file or enter the requested values, then run the tool.
This browser tool does not upload the selected source to ImgNimble. Closing or refreshing clears the selected files and generated result from the page.
Common questions
Base64 Image Encoder and Decoder reads the selected input into browser memory and performs its documented operation on this device. It does not submit the source file to ImgNimble while using this browser-first workspace.
A Base64 data URL or a decoded image blob.
Base64 increases size by roughly one third and is unsuitable for large web assets. Only supported image MIME types are previewed.
Base64 Image Encoder and Decoder validates the selected file before processing. Use JPG, JPEG, PNG, WEBP, GIF, HEIC, HEIF, SVG within the 40 MB per-file limit. Keep an untouched original for comparison.
The Base64 Image Encoder and Decoder workflow runs in browser memory. ImgNimble does not receive the source file for this local operation; refreshing or closing the page clears the selected input and generated in-page result.
Practical checks
Use encode mode for HTML/CSS embedding or decode mode to inspect and save a valid image data string.
Keep the source, download the Base64 Image Encoder and Decoder result as a new file, and verify dimensions, transparency, colour, metadata and visual detail before replacing any production asset.