Base64 Encode / Decode

Encode text to Base64 or Base64URL, decode UTF-8 text, and keep the entire operation in your browser.

TOOLMERA / DEVELOPER

Browser-first processing

Base64 is an encoding format, not encryption. Do not use it by itself to protect secrets or passwords.

Privacy-mindedBrowser-first whenever possible

Instant workflowNo setup or account required

Free core toolOpen it and get the task done

WHY TOOLMERA

Built to get the task done.

UTF-8 text
Base64 & Base64URL
Browser-side processing

ABOUT THIS TOOL

Base64 Encode & Decode — UTF-8 & Base64URL

Encode UTF-8 text to standard Base64 or Base64URL and decode it back locally in your browser.

What Base64 encoding does

Base64 represents bytes using a restricted set of ASCII characters so binary or UTF-8 data can travel through text-oriented systems. Toolmera converts text to UTF-8 bytes before encoding and converts decoded bytes back to UTF-8 text.

Base64 increases data size compared with the original bytes and provides no secrecy. It is an encoding format, not encryption.

Standard alphabetA–Z, a–z, 0–9, +, /

Padding= may be added at the end

Base64URLUses - and _ instead of + and /

SecurityEncoding, not encryption

Standard Base64 vs. Base64URL

Standard Base64 uses + and / characters and commonly uses = padding. Base64URL replaces + with - and / with _; unpadded Base64URL is common in URL-oriented formats.

Toolmera provides separate Standard Base64 and Base64URL modes. The current utility is text-focused: it does not upload or encode files and it does not generate Data URI wrappers.

HOW IT WORKS