Base64 Text Tool

PRACTICAL GUIDE · UPDATED OCTOBER 13, 2026

Encode and decode text with an explicit round-trip check

Use this tool when a text value must be represented as standard Base64, or when you need to recover text from a known Base64 value. Encoding is reversible and does not make the input confidential. Do not treat an encoded password or token as protected just because it is difficult to read at a glance.

Try a known input

Enter Hello in Plain Text and select Encode. The expected standard Base64 result is SGVsbG8=. Copy that result into Base64 Input and select Decode. The recovered text should be Hello. This small test makes it clear which part of the interface handles each direction.

Check spaces, line endings, and character encoding

If results differ from an integration's expected value, inspect the exact original text. A trailing newline or an extra space is part of the input and can change the encoding. For non-ASCII text, the producing and consuming systems must agree about the byte encoding. Use a short fictional phrase containing the relevant characters, then check the decoded result instead of judging the encoded string by appearance.

Use the right kind of decoder

This page is intended for text. An image or another binary file can be valid Base64 without decoding into readable text. For image workflows, use the Base64 Image tool. If your input is a complete data URI, identify whether the receiving field expects the prefix as well as the encoded payload. Copying an entire JSON response into a Base64-only field is another common mistake.

If decoding fails

Check for truncation, accidental surrounding quotes, the required Base64 alphabet, and missing padding. Standard Base64 and URL-safe Base64 are different variants; verify the protocol rather than changing characters blindly. A successful decode establishes that the bytes can be recovered, not that the recovered content is trusted or safe to execute.

Before sharing

The normal browser path works locally, with server routes available for fallback requests. Use non-sensitive examples and compare the final decoded text with the original. Base64 generally expands data before later transport compression; it is an encoding choice, not an image-compression method.