What is Base64 encoding used for?+
Base64 is used to encode binary data as ASCII text so it can be transmitted safely in contexts that only support text, such as JSON payloads, HTML data URIs, HTTP headers, and email (MIME).
Does Base64 encrypt my data?+
No. Base64 is an encoding, not encryption. Anyone who sees the Base64 string can instantly decode it. Do not use Base64 to hide sensitive information.
What is URL-safe Base64?+
Standard Base64 uses + and / characters, which have special meaning in URLs. URL-safe Base64 replaces them with - and _, making the output safe to use in query strings and path segments.
Why does my Base64 string end with == or =?+
These are padding characters added to make the encoded length a multiple of 4. They are required by the standard and should not be removed.
What is Base64 commonly used for in web development?+
Base64 is used to embed images directly in HTML or CSS as data URIs, encode binary file attachments in JSON API payloads, encode credentials in HTTP Basic Authentication headers, and represent binary data in JWT token parts.
Is Base64 a form of encryption?+
No. Base64 is an encoding scheme, not encryption. It makes data transportable as text but provides zero security - anyone can decode it instantly without any key. For security, use proper encryption such as AES-256.
What is the difference between Base64 and hex encoding?+
Both encode binary data as text. Hex uses only characters 0-9 and A-F (2 characters per byte). Base64 uses 64 characters (1.33 characters per byte). Base64 produces shorter output - a 3-byte input becomes 4 Base64 characters versus 6 hex characters.
How do I handle special characters when encoding to Base64?+
Standard Base64 handles all binary data including special characters automatically. If you are encoding plain text, ensure it is UTF-8 encoded first. The tool handles UTF-8 text input correctly before encoding.
Is there a maximum size limit for Base64 encoding?+
This tool has no enforced size limit for text encoding. For very large files (multi-megabyte binaries), use the Base64 File Encoder tool which handles file uploads. Note that Base64 increases size by 33%, so a 1 MB file becomes 1.33 MB encoded.