How to Normalize Base64
- 1Paste your Base64 string into the input field.
- 2Select your desired output format (standard or URL-safe).
- 3Choose padding and line break formatting options.
- 4Copy the normalized output or download the result.
Common Use Cases
Standard Format
Convert Base64 to standard format with + and / characters for maximum compatibility.
URL-Safe Format
Convert to URL-safe format using - and _ characters for use in URLs and file names.
Padding Control
Add or remove padding characters (=) based on your requirements or system constraints.
Line Break Formatting
Format Base64 with proper line breaks for email (RFC 2045) or remove them for compact storage.
Frequently Asked Questions
What is the difference between standard and URL-safe Base64?
Standard Base64 uses + and / which can cause issues in URLs. URL-safe Base64 replaces them with - and _ respectively, making it safe for use in URLs and file names.
When should I remove padding?
Some systems (like JWT tokens) omit padding to reduce size. However, most systems require proper padding. Only remove it if you know your target system accepts unpadded Base64.
What are line breaks used for?
Line breaks (typically at 76 characters) are required by some standards like RFC 2045 (MIME) for email compatibility. Modern web APIs usually prefer continuous strings without line breaks.
Is normalization lossless?
Yes, normalization only changes the format, not the underlying data. The decoded content remains identical regardless of the Base64 format used.