How do I encode Base64 online without a server?

Use our 100% client-side tool. Paste your text, select Base64 and Encode, and click Process. The conversion happens entirely in your browser memory.

Is there a free URL encoder/decoder for developers?

Yes, our universal tool supports full URL percent-encoding and decoding for query strings and URI components at no cost.

Universal Encode & Decode Tool | Base64, URL, HTML, Unicode, Binary Online

Universal Encode & Decode Tool

Convert between Base64, URL, HTML, Unicode, ASCII, and Binary instantly.

Encoding Mode

Action

How to Use the Online Encoder and Decoder

Our universal tool is designed for developers who need quick, reliable data transformations without compromising security. Follow these simple steps:

Step 1: Choose Your Format

Select the desired mode such as Base64, URL encoding, or Binary from the primary dropdown menu.

Step 2: Input Your Data

Paste the raw string or encoded text into the left-hand panel. The tool supports multiple character sets.

Step 3: Execute Action

Select "Encode" or "Decode" and click the process button. Your result is generated instantly offline.

Comparison: Encoding vs Encryption

A common search query is the difference between encoding and encryption. While both transform data, they serve different purposes:

Encoding: Used to transform data into a format that can be consumed by a different system (e.g., Base64 for binary data in text emails). It is not a security measure.
Encryption: Used to keep data secret from unauthorized parties. It requires a key to decode (e.g., AES-256).

Advanced Encoding Use Cases

Why do developers use these specific formats?

Base64: Essential for Data URIs and basic Auth headers.
URL Encoding: Also known as Percent-encoding, it makes data safe for inclusion in URI components.
HTML Entities: Prevents Cross-Site Scripting (XSS) by neutralizing special characters like < and >.
Binary/ASCII: Crucial for debugging low-level data transmission and protocol analysis.

Frequently Asked Questions

Is this tool safe for sensitive data?

Yes. This tool is a 100% client-side application. No data is ever transmitted to a server. Your text stays entirely within your browser's memory, ensuring maximum privacy for API keys or credentials.

Does it support UTF-8 characters?

Absolutely. Our Base64 and URL encoding functions are optimized for UTF-8 character handling, allowing you to encode international text and emojis reliably.

Why use an online encoder instead of a script?

Speed. While you can write a script to decode Base64, our tool provides an instant visual interface for quick debugging without the overhead of setting up a local environment.