Base64 Encoder & Decoder

Encode text or any file to Base64, or decode Base64 back to readable text or the original file.

Free to useNo sign-upProcessed locally

Base64 turns binary data into plain text so it can travel safely through systems built for text — e-mail, JSON, HTML, CSS and URLs. Developers use it for data URIs, API payloads and basic authentication headers.

The RIZONI TOOLS Base64 tool is UTF-8 safe, supports URL-safe Base64 and data URIs, and runs entirely in your browser.

How to use Base64 Encoder & Decoder

Choose Encode or DecodeSelect the direction, and for encoding choose Text or File.
Enter your dataPaste text or Base64, or drop a file to encode.
Set optionsEnable URL-safe output or data URI output if you need them.
Copy or downloadCopy the result, or download decoded binary data as a file.

Features

Encode text to Base64 (UTF-8 safe)
Encode any file to Base64
Decode Base64 to text
Decode Base64 to a downloadable file
URL-safe Base64URL option
Data URI output for images and files
Accepts data URIs and URL-safe input when decoding
Private — runs locally

Why use Base64 Encoder & Decoder?

Embed small images directly in HTML or CSS.
Inspect and debug Base64 values from APIs and tokens.
Convert files for JSON or XML payloads.
Safe for sensitive data because nothing is uploaded.

Base64 is encoding, not encryption

Anyone can decode Base64, so it provides no security. Never use it to hide passwords or confidential information. Its purpose is to represent binary data safely as text.

Base64 output is about 33% larger than the original data, so it's best suited to small files such as icons.

Standard vs. URL-safe Base64

Standard Base64 uses the characters + and / and pads the end with =. These characters have special meanings in URLs, so URL-safe Base64 (Base64URL) replaces them with - and _ and usually drops the padding. JSON Web Tokens (JWT) use Base64URL. The decoder accepts both forms.

Privacy and security

This tool runs entirely in your browser. Your files are processed on your own device and are not uploaded to our servers. When you close the page, the data is gone.