Base64 Encoder/Decoder

Free online tool to encode and decode Base64 strings with support for multiple formats and file types.

CSS Gradient Generator
Free Online Text Comparison Tool
Color Contrast Checker
Box Shadow Generator
Image to Base64 Converter
SERP Snippet Preview
UUID Generator
CSV to JSON Converter
Case Converter
Lorem Ipsum Generator
QR Code Generator
API Request Builder
JSON to CSV Converter
URL Encoder / Decoder
JSON ↔ YAML Converter
Color Format Converter
Meta Tag Generator
Keyboard Navigation Test
Markdown Previewer
Favicon Generator
Hash Generator
Image Accessibility Checker
Flexbox Generator
Word Counter & Text Analyzer
SVG Wave Generator
JWT Decoder
Readability Checker
Password Generator
JSON to Go Struct
JSON to Kotlin Data Class
JSON to Rust Struct
JSON to TypeScript Interface
JSON to C# Class
YAML to Go Struct
YAML to Kotlin Data Class
YAML to Rust Struct
YAML to TypeScript Interface
XML to Go Struct
XML to Kotlin Data Class
XML to Rust Struct
XML to TypeScript Interface
CSV to Go Struct
CSV to Kotlin Data Class
CSV to Rust Struct
CSV to TypeScript Interface
CSV to XML
CSV to YAML
JSON to XML
JSON to YAML
XML to CSV
XML to JSON
XML to YAML
YAML to CSV
YAML to JSON
YAML to XML
Base64 Encoder / Decoder
CSS Grid Generator
SEO URL Checker
HTTP Status Checker
JSON Formatter
Code Formatter & Beautifier
Schema Markup Generator
Keyword Density Analyzer
Meta Description Generator
Image Resizer & Compressor
Word Counter & Text Analyzer
Percentage Calculator - Calculate Percentages Online
Age Calculator - Calculate Your Exact Age Online
Random Number Generator - Generate Random Numbers Online
Regex Tester - Test Regular Expressions Online
Domain Age Checker - Check Domain Registration Date & Age
Color Palette Generator - Create Beautiful Color Schemes
Unit Converter - Length, Weight, Temperature & More
Mortgage Calculator - Calculate Monthly Payments & Total Interest
Property Tax Calculator - Estimate Annual Property Taxes
Budget Calculator - Monthly Budget Planner & Expense Tracker

Buy me a coffee

Support my work

$5

Base64 Encoder and Decoder Online

Free online tool to encode text into Base64 format and decode Base64 strings back to text. Perfect for developers working with data encoding, URL-safe strings, and binary data transmission.

Core Features

  • Text Encoding & Decoding

    Convert plain text to Base64 and decode Base64 strings back to their original text with support for special characters and Unicode.

  • URL-Safe Encoding

    Generate URL-safe Base64 strings by replacing '+' with '-' and '/' with '_', perfect for use in URLs and filenames.

  • File Support

    Upload text files for encoding or load Base64 data from files for quick decoding. Download results as text files.

Advanced Features

  • Auto-Detection

    Automatically detect Base64 strings and validate input format to prevent errors during encoding and decoding.

  • Format Preservation

    Option to preserve newlines and formatting in the encoded output, maintaining text structure when decoded.

Common Use Cases for Base64

  • Encoding binary data for transmission in text-based protocols
  • Creating data URLs for embedding images and files in HTML/CSS
  • Storing binary data in JSON format
  • Making strings URL-safe for web applications
  • Email attachments and MIME encoding

Frequently Asked Questions

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data using 64 characters (A-Z, a-z, 0-9, + and /). It's commonly used to transmit binary data through systems that only support text content.

Why use URL-safe Base64?

URL-safe Base64 replaces characters that have special meaning in URLs (+ and /) with URL-safe alternatives (- and _). This makes the encoded string safe to use in URLs without additional encoding.

Is Base64 encoding secure?

Base64 is an encoding method, not an encryption method. It doesn't provide security or privacy - anyone can decode Base64 data. Use proper encryption if you need to secure your data.

Start Encoding and Decoding

Whether you're working with data URLs, handling binary data, or need URL-safe strings, our Base64 tool makes encoding and decoding simple and efficient. Try it now with our user-friendly interface!

Related Security & Data Processing Articles

Mastering JavaScript Best Practices

Learn essential JavaScript practices including secure data handling, encoding best practices, and working with binary data in modern web applications.

React Performance Optimization Guide

Optimize React applications with efficient data handling, including Base64 encoding for images and proper data URL management.

Frontend Development Best Practices

Comprehensive guide to secure frontend development, including proper data encoding, URL safety, and handling binary data in web applications.

Learn Advanced JavaScript Techniques

Master advanced JavaScript techniques including data transformation, encoding methods, and secure data handling in modern applications.