🧐 Base64 Checker Online
Validate if your text or Data URL is a proper Base64 string. This free Base64 Checker tool instantly verifies Base64 encoding and detects if it represents an image.
FAQ: Base64 Checker
🔹 How do I check if a string is Base64?
Paste your text or Data URL into the input box and click Check. The tool will instantly validate whether it is a properly formatted Base64 string.
🔹 Can I check Base64 images?
Yes ✅. If your string starts with data:image/..., our checker will detect that it’s a Base64-encoded image (PNG, JPG, or SVG).
🔹 What does “invalid Base64” mean?
This means the string cannot be properly decoded. It may contain invalid characters, be incomplete, or not follow the Base64 format. Try re-encoding your text with our Base64 Encode tool.
🔹 Is Base64 only for images?
No. While Base64 is often used for embedding images in HTML or CSS, it can encode any binary or text data. For example, JSON, XML, or even authentication tokens.