Base64 Decoder Online - Free Base64 to Text/File Converter
Free online Base64 decoder tool that converts Base64 encoded strings back to original text, files, or images. Supports multiple input formats, batch processing, and file downloads. No installation required - works directly in your browser!
📋 Decoded Results
SGVsbG8gV29ybGQ=→ "Hello World"eyJuYW1lIjogIkpvaG4ifQ==→ {"name": "John"}PGRpdiBjbGFzcz0iY29udGFpbmVyIj4=→ HTML content
Secure Processing
All decoding happens locally in your browser. Your data never leaves your computer.
Lightning Fast
Decode large Base64 strings instantly with our optimized algorithms.
Bidirectional
Not just decode! Also encode text/files to Base64 with our built-in encoder.
Smart Detection
Automatically detects and validates Base64 format. Shows detailed analysis.
Why Use Our Base64 Decoder?
Perfect for debugging APIs, decoding JWT tokens, and working with data URLs.
Decode text, JSON, XML, HTML, images, and binary data from Base64 format.
Process multiple Base64 files at once. Great for bulk data extraction.
Get detailed information about the encoded data including size and validation.
Common Use Cases
- Web Developers: Decode data URLs and API responses
- Security Analysts: Examine JWT tokens and encoded payloads
- System Administrators: Decode configuration files and logs
- QA Testers: Validate Base64 encoded test data
📝 Base64 Technical Details
What is Base64? Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format.
Character Set: Uses 64 characters: A-Z, a-z, 0-9, +, / (and = for padding)
Common Uses: Email attachments, data URLs, storing binary in JSON/XML, encoding credentials
❓ Frequently Asked Questions
What types of data can I decode?
Our decoder handles text, JSON, XML, HTML, images (PNG, JPEG, GIF), and binary files.
Is there a file size limit?
No hard limit! Typically handles files up to 50MB without issues.
Can I decode Base64 from URLs?
Yes! Paste data URLs (starting with data:) or fetch Base64 from remote URLs.
How accurate is the decoding?
100% accurate. Uses native browser APIs for decoding.
✅ Browser Compatibility
Works on all modern browsers. No plugins or extensions required.