Is the base64 validator private?
Yes. The validator accepts whitespace, standard Base64, Base64URL, and Data URL input before reporting normalized details. All processing happens locally in your browser — nothing is uploaded to our servers.
Base64 Validator
Check whether a value is valid Base64, normalize its padding, and inspect its decoded byte size.
Runs locally in your browser
How to use it
- Paste your input or choose a file from this device.
- Run the conversion and review the detected type or preview.
- Copy the result or download it for your project.
Built for Base64 values
The validator accepts whitespace, standard Base64, Base64URL, and Data URL input before reporting normalized details.
No registration, watermark, queue, or server upload is required.
Use Base64 wisely
Base64 is ideal for text-only APIs, small embedded assets, test fixtures, and portable documents. It increases payload size, so external files are usually better for large public assets.
Frequently asked questions
What inputs does the validator accept?
Standard Base64, Base64URL, Data URLs, and values with whitespace or line breaks.
What information does validation return?
Whether the value is valid, decoded byte size, normalized length, and padding details.
When should I use Base64 for Base64 values?
Use it when a text-only channel or API must carry binary data, or when a small Base64 values asset needs to live inside a self-contained document. Prefer separate files for large, cacheable public assets.