Convert images and Base64 in either direction, locally

When Image to Base64 is useful

Base64 Data URLs are convenient for small icons, placeholders, email assets, API fixtures, and configuration files that need to remain self-contained. They remove a separate image request, but the encoded text is roughly 33 percent larger than the original binary, so large photos should usually remain ordinary files.

The converter accepts PNG, JPEG, GIF, WebP, and SVG files and produces both `data:image/png;base64,...` output and raw Base64 without the MIME header. Copy either representation directly into HTML, CSS, JSON fixtures, or local development tools.

How Base64 to Image restoration works

A Data URL already carries its MIME type. For raw Base64, the tool inspects PNG, JPEG, GIF, WebP, and SVG signatures and chooses the matching download extension. If the signature is unavailable, select the intended MIME type before decoding.

Restoring bytes is not the same as transcoding. Renaming the output extension does not turn PNG into JPEG, and this page does not resize or recompress the image. It reconstructs the original bytes and downloads them with the matching type.

Supported formats and limits

• Formats: PNG, JPEG/JPG, GIF, WebP, and SVG
• Maximum source or decoded size: 10MB
• Accepts Data URLs and whitespace-separated raw Base64
• Rejects mismatched declared MIME types and detected signatures
• Runs entirely in the current browser tab

Security and performance notes

Private screenshots and internal design assets should not be sent to an unknown conversion server. This tool uses FileReader, typed arrays, and Blob URLs locally; the selected file and decoded content are not uploaded for conversion.

Base64 is an encoding rather than a compression format. Keep large assets as cacheable files and reserve Data URLs for small resources where fewer requests or a self-contained fixture matters more than transfer size.

Pairs well with

Jump to other JSON2Class utilities that naturally follow this one.