Convert Data URI to ASCII extracts the payload from a data URI and turns it back into standard ASCII text. A data URI combines a media type, optional parameters, an encoding marker such as ;base64, and the actual payload after a comma. The tool separates those parts so you can inspect the URI structure and recover the embedded text without manually decoding the prefix or payload.
Both common payload styles are supported for this ASCII-focused workflow. A plain text data URI uses percent-encoded text where required, while a Base64 data URI stores the underlying bytes as Base64. The converter identifies the form from the URI and applies the correct decoding step. It then validates the resulting bytes as standard ASCII, which means a valid data URI can still be rejected if its payload represents non-ASCII text.
Start with the sample, then try a URI containing spaces and punctuation. The output statistics give you the decoded length, while the inspection table lets you see the pieces that were parsed. This is especially useful when debugging generated snippets because a missing comma, an incorrect Base64 marker, or a malformed percent sequence can be identified without guessing.
Use Clear when switching between unrelated data URIs. Copy puts the decoded text on the clipboard and Download saves it as a plain text file. The decoded payload is shown as text and is never injected into the document as HTML or executed as code. All parsing happens in the browser without a remote conversion service.
A data URI is only a representation. The media type in the URI tells a consumer what kind of payload is being described, but this tool intentionally expects a text-oriented ASCII result. If the URI actually contains an image, compressed file, or general Unicode text, use a decoder that understands that payload instead of forcing it through an ASCII-only conversion.
A reliable verification method is a round trip. Generate a data URI from a short ASCII string using the reverse tool, then paste the URI here. The decoded result should match the original exactly. If it does not, check whether the original URI had an additional transformation layer or whether the payload was encoded more than once.
Data URI prefixes can contain parameters, so avoid treating the entire string as Base64. The separator comma marks the start of the actual payload. In Base64 mode the ;base64 marker changes how that payload must be decoded; in plain mode percent-decoding is appropriate. The converter keeps those decisions inside the parsing logic and reports invalid structure clearly.
This tool is helpful for inspecting generated HTML snippets, documentation examples, and test fixtures where a small ASCII payload has been embedded into a URI. Because the implementation is browser-side and deterministic, the same valid data URI should produce the same decoded ASCII result every time.