Base64 Encoder & Decoder
Encode text or files to Base64 and decode Base64 back to original content. Essential developer utility.
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This tool is currently in development. Check back soon or explore the tools below.
How to Use Base64 Encoder & Decoder
Choose encode or decode
Select 'Encode' to convert text/files to Base64, or 'Decode' to convert Base64 back to original.
Enter your input
Paste text or drop a file to encode. Paste a Base64 string to decode.
Copy the result
Copy the encoded/decoded output or download as a file.
About Base64 Encoder & Decoder
Base64 encoding converts binary data (or text) into a string of ASCII characters, making it safe to transmit over systems that only handle text. It's widely used in web development for embedding images in HTML/CSS, encoding API credentials, handling email attachments, and data URIs.
Our Base64 Encoder/Decoder supports both text and file encoding, handles URL-safe Base64 variants, and processes everything in your browser for complete privacy.
Common Base64 use cases
*Images in CSS:* Embed small images directly in your stylesheet as Base64 data URIs to eliminate HTTP requests. Example: background-image: url('data:image/png;base64,...').
*API authentication:* HTTP Basic Auth encodes "username:password" in Base64 in the Authorization header. Our tool helps you construct these headers quickly.
*Email attachments (MIME):* Email systems use Base64 to encode binary attachments into text that can be safely included in email messages.
*JWT tokens:* JSON Web Tokens use Base64url encoding for the header and payload sections. Decode JWTs to inspect their contents without a full JWT library.
Key Features
Text & File Support
Encode any text or binary file to Base64.
URL-Safe Variant
Generate URL-safe Base64 (replaces + and / with - and _).
JWT Decoder
Decode and inspect JWT token payloads.
Data URI Generator
Generate data: URIs for image embedding.
Benefits
- Embed images directly in CSS/HTML without extra HTTP requests
- Construct HTTP Basic Auth headers for API testing
- Debug JWT tokens by inspecting encoded payloads
- Transfer binary data through text-only channels
Who Uses This Tool
- Developers embedding small images as CSS data URIs
- API developers building HTTP Basic Auth headers
- Security engineers inspecting JWT token contents
- DevOps engineers encoding secrets for environment variables
Pro Tips for Best Results
- 1Don't Base64-encode sensitive data without encryption — Base64 is encoding, not encryption
- 2Only embed small images (under 10KB) as Base64 data URIs — larger images should use regular URLs
- 3Use URL-safe Base64 when the encoded string will appear in URLs or filenames
100% Private
Files never leave your browser
Lightning Fast
Instant browser-side processing
No Account Needed
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