Base64 Decoder
EncoderFree Online Base64 Decoder Tool
Convert Base64 strings back to their original format with our high-accuracy decoder. Perfect for developers working with APIs, data URIs, or anyone needing to extract original content from Base64-encoded data.
Our tool handles both standard and URL-safe Base64, with smart detection to automatically reconstruct text, images, and file attachments exactly as they were before encoding.
How to Decode in 3 Simple Steps
- Paste your Base64 string - Or upload a file containing encoded data
- Click "Decode" - Instant conversion with format detection
- Access your content - View text, download files, or preview images
Pro Tip: For data URIs (starting with "data:"), our decoder automatically extracts and processes the Base64 portion.
Decoder Features
- Smart format detection - Auto-recognizes text, images (JPG/PNG/GIF), PDFs, and common file types
- Data URI support - Direct processing of data: URLs
- File reconstruction - Complete binary file recovery with original format
- Image preview - Instant visualization of decoded images
- Character set handling - Proper decoding of UTF-8 and other text encodings
- URL-safe decoding - Handles web-safe Base64 variants
Why Decode Base64?
- Extract files from API responses and data URIs
- Debug encoded data in network traffic or logs
- Recover original content from encoded strings
- Process email attachments sent in Base64 format
- Analyze encoded payloads for security reviews
Common Decoding Use Cases
- API Development - Process Base64-encoded file uploads
- Web Scraping - Extract embedded resources from data URIs
- Email Processing - Decode MIME attachments
- Forensic Analysis - Examine encoded data in system logs
- Data Recovery - Restore files stored in Base64 format