Developer Guide4 min read Updated August 24, 2026
Base64 Encoding & Decoding Guide
Base64 is widely used in web development for encoding binary assets into Data URIs, authorization headers, and web tokens. Here's how to encode and decode Base64.
Quick Takeaway
Use our Base64 tool to convert plain text into Base64 or decode Base64 strings back to readable UTF-8 text offline.
Standard vs URL-Safe Base64
Standard Base64 uses + and / characters which require URL encoding. URL-safe Base64 substitutes - and _ for safe transmission in query parameters.
Try Free Web Tools Mentioned in This Guide
Frequently Asked Questions
Is Base64 encryption?↓
No. Base64 is an encoding format, not encryption. Anyone can decode a Base64 string.