How to Base64 Encode & Decode Strings, Images & Binary Files

Published: 2026-02-04 | Read Time: 3 min read

Convert text strings, images, and binary payloads into 64-character ASCII safe strings and data URLs for API headers and inline CSS embedding.

Frequently Asked Questions

Does Base64 encoding increase file size?

Yes. Base64 represents 3 binary bytes using 4 ASCII characters, resulting in an exact 33.3% size increase.