What is URL-safe Base64?

A variant that replaces `+` and `/` with `-` and `_`, and omits padding. Used in JWTs and URL parameters.

Is Base64 encryption?

No. Base64 is encoding, not encryption. Anyone can decode it trivially. Never use it to protect sensitive data.

Base64 Encode / Decode

Switch between plain text and Base64 in either direction. Supports UTF-8 text and binary files up to 10MB. URL-safe variant is available.

Runs locally in your browser

Plain text

0 chars · 1 line

Base64 output

Output will appear here…

URL-safe variant (- _ instead of + /, no padding)Line-wrap at 76 chars (MIME style)

URL Encode / Decode

Percent-encode URLs and query parameters, and decode them.

Image to Base64

Convert images into Base64 data URIs.

HTML Entity Encode / Decode

Convert HTML entities to characters and back.

Hash Generator

Compute MD5, SHA-1, SHA-256, and SHA-512 hashes.

About Base64 Encode / Decode

Switch between plain text and Base64 in either direction. Supports UTF-8 text and binary files up to 10MB. URL-safe variant is available.

Base64 Encode / Decode is part of FizzKit — a collection of focused, browser-based tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.

Frequently asked questions

Base64 encodes binary data as ASCII text so it can be transmitted safely through text-only systems — email, JSON payloads, data URIs, and so on.

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