Data URI Validator
Paste a Data URI to check whether it is valid — complete with the reason if it is invalid and a component breakdown if it is valid. Everything is processed on your device.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
data:text/plain;base64,SGVsbG8=
Example Output
✓ VALID — text/plain, base64
How to Use
- 1Paste the a Data URI you want to check into the input box.
- 2If the tool offers extra options (e.g. dialect, flags, or variant), set them as needed.
- 3Click Validate (or press Ctrl+Enter).
- 4Read the result badge — VALID, INVALID, or VALID with a warning — along with the details and the list of issues, if any.
About Data URI Validator
Data URI Validator checks the data: scheme that embeds content directly in a URL — the format data:[<mediatype>][;base64],<data>. It checks the media type, the encoding (base64 or URL-encoded text), and validates the base64 payload when present.
Useful when inlining small images or fonts as Data URIs in CSS/HTML and you want to confirm the syntax is correct.
FAQ
Is my data sent to a server?
No. All validation runs in your browser with JavaScript. Nothing is uploaded, logged, or stored on our servers — safe for sensitive data.
How is this validator different from a parser or formatter?
A validator answers one question: is this input correct/valid? It returns a valid/invalid badge with the reason. A parser breaks input into its components, and a formatter tidies its layout. Use a validator when you just need to confirm something is sound before using it.