Encode and decode Base64 data online for free. Convert text or files to Base64 and back instantly. Useful for developers and data encoding tasks.
Everything you need to know about using our Base64 Convertor
Base64 converts binary data (images, files) into text format that can be safely transmitted over systems that only handle text. Common uses: embedding images in HTML/CSS, encoding email attachments, storing binary data in JSON, and data URIs.
Upload any file (image, PDF, binary) and it instantly converts to Base64 text string. Copy the output and paste into HTML img src, CSS background, or JSON data fields. Files up to As much as your RAM can han) supported.
Yes! Paste any Base64 string and decode it back to the original file format. Works with data URIs (data:image/png;base64,...), raw Base64 strings, or JSON-encoded data. Download the recovered file instantly.
Yes, Base64 increases file size by about 33%. It's a trade-off: larger size for text compatibility. Best for small files (<1MB) like icons. For large files, consider direct binary upload instead of Base64.
No - Base64 is encoding, NOT encryption. Anyone can decode it instantly. It provides zero security. For sensitive data, use actual encryption (AES, RSA) before or after Base64 encoding.
Encode and decode Base64 data online for free. Our Base64 converter handles text strings, images, files, and binary data with instant conversion. Perfect for web developers embedding images in CSS and HTML, API engineers encoding authentication tokens, and data engineers preparing binary payloads. Supports URL-safe Base64, standard Base64, and MIME formatting.
Paste text to encode or Base64 to decode. For files, drag-and-drop images, PDFs, or any binary file. The tool auto-detects input type and converts accordingly. Copy the result or download as a file. Decode Base64 image strings back to viewable images. Validate Base64 checksums. All processing happens in your browser with no server uploads for data privacy.
Web development - embed small images directly in HTML/CSS as data URIs for fewer HTTP requests
API authentication - encode API keys and bearer tokens in Base64 for Authorization headers
Email attachments - convert files to Base64 for MIME email message construction
Data URLs - create inline SVG and image data URLs for single-file HTML deliverables
Configuration - encode binary secrets and certificates for Kubernetes and Docker configs
| Feature | Keynou | Base64.guru | CodeBeautify |
|---|---|---|---|
| Price | Free | Free (ads) | Free (ads) |
| File Upload | Yes | No | No |
| URL-safe Mode | Yes | No | Yes |
| Image Preview | Yes | No | Yes |
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Encode and decode Base64 data online for free. Convert text or files to Base64 and back instantly. Useful for developers and data encoding tasks.
Real-time encoding and decoding with no server upload. Everything happens in your browser.
Your data never leaves your device. No tracking, no storage, complete privacy guaranteed.
Seamlessly switch between encoding and decoding with a single click. Smart swap feature.