Base64 Encode / Decode Online
Encode text or files into Base64 or decode Base64 back to original instantly. A fast, free, and secure tool for developers, designers, and creators.
Tool Highlights
- Encode & decode text instantly
- Convert files to Base64 and download decoded files
- Fully offline — nothing uploaded to server
- Supports images, JSON, documents, and binary files
- Perfect for developers & debugging tasks
Supported Formats
About Base64 Encoding
Base64 is a method used to convert binary data into readable text. Developers commonly use Base64 in APIs, HTML/CSS embedding, and data transfer systems. This tool helps you encode plain text, JSON, or files into Base64 or decode Base64 strings back into original content.
How to Use This Tool
- Paste your text or Base64 string into the input box.
- Click “Encode” to convert text → Base64.
- Click “Decode” to convert Base64 → text.
- Upload a file to instantly convert it to Base64.
- Decode Base64 file data to download a restored version.
Popular Use Cases
- Embedding images into CSS/HTML
- Preparing API body params
- Encoding attachments for email or messaging
- Safely transporting binary data as text
- Debugging encoded data from third-party APIs
Best Practices
- Base64 increases file size by around 33% — use moderately.
- Compress images before Base64 converting.
- Avoid encoding large files for performance reasons.
Common Mistakes
- Using Base64 as encryption (Base64 is NOT encryption)
- Embedding very large images in HTML
- Incorrect MIME type when decoding files
FAQ
What is Base64 used for?
Base64 is used to encode binary data as text for APIs, HTML, JSON, and data transport.
Is Base64 secure?
No. It is only encoding — not encryption. Do not use Base64 for sensitive information.
Can I decode Base64 into a file?
Yes. This tool converts Base64 back into its original file format and lets you download it.
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