Technical Documentation & FAQ

Base64 to Image

  • Section A: The Technical Deep Dive A Data URI is a string that contains all the data of an image. If you find a long string starting with data:image/... in a database, a CSS file, or a JSON response, this tool allows you to visualize it. JOTO parses the MIME-type to determine the format and renders the binary data directly into a canvas element for previewing and downloading.

  • Section B: Industry Use Cases

    • Database Inspection: Viewing images that have been stored as BLOBs or Base64 strings in a DB.

    • CSS Debugging: Identifying what an inlined background-image actually looks like.

    • API Testing: Verifying that an image-rendering API is returning the correct encoded data.

  • Section C: Reconstructing the File

    JOTO decodes the string into a Uint8Array, wraps it in a Blob with the correct MIME-type, and generates a temporary URL. This allows you to download the 'string' as a real .png or .jpg file on your computer.

  • Section D: Developer FAQ

    • Q: Which formats are supported? A: PNG, JPG, WebP, GIF, and SVG.

    • Q: What if my string doesn't have the 'data:image' prefix? A: JOTO will try to detect the file type by inspecting the 'magic bytes' of the decoded binary.