Base64 Normalizer
Clean up and standardize your Base64 strings. Remove whitespace, fix padding, convert between standard and URL-safe formats, and format with MIME-style line breaks.
Last Updated: September 2026
100% Client-Side — Your data never leaves your device
Paste a Base64 string above and click Normalize
Frequently Asked Questions
Search below or browse through our most commonly asked questions.
The normalizer takes a poorly formatted Base64 string (with spaces, newlines, tabs, or missing padding) and cleans it into a single, continuous, properly-padded standard Base64 string.
Use it when copying Base64 from emails, PDFs, or formatted JSON logs where line breaks or spaces might have corrupted the string.
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