Is this Base64 converter private?

Yes. All encoding and decoding happens in your browser. No input is uploaded to a server.

What is URL-safe Base64?

URL-safe Base64 replaces + with - and / with _, and can omit padding characters so the output is safe in URLs and tokens.

Yes. You can convert small files to Base64 and convert Base64 back into a downloadable file directly in your browser.

Convert text and small files to Base64, decode Base64 back to text, and generate downloadable files — all client-side in your browser.

URL-safe Base64 mode

Replaces +// with -/_ and removes padding while encoding.

Input Text

Base64 / Decoded Output

File to Base64

Best for small files. Large files may be slow in-browser.

Base64 to Downloadable File

File Base64 Output

Is this tool secure for sensitive text?

Everything runs locally in your browser. No server upload is required for conversion.

Why do I get an invalid Base64 error?

The input may contain unsupported characters, incorrect padding, or partial/corrupted Base64 data.

Does URL-safe mode change decoded content?

No. It only changes how Base64 is represented for safe transport in URLs and tokens.

Keep data cleanup moving with the tools people usually open alongside Base64 conversion.