Base64 Encoder & Decoder: Encode and Decode in Your Browser
Encode text and files to Base64 or decode Base64 strings back to text, images, and binary. Supports URL-safe encoding, line wrapping, and image preview — a daily utility for developers and IT workflows.
Key Features
- Encode plain text or upload files
- Decode Base64 to text with UTF-8 support
- URL-safe Base64 mode (RFC 4648)
- Optional 76-character MIME line wrapping
- Image preview when decoding image Base64
Common Use Cases
- Embed small images in CSS or HTML data URIs
- Decode Base64 payloads from API responses
- Prepare Authorization headers for Basic auth
- Convert binary attachments for JSON transport
- Debug Base64 strings from logs and config files
Benefits
- File encoding stays on your device
- Instant encode/decode with character and byte stats
- Handles URL-safe variants used in JWT and URLs
- No signup or file size API limits
What is Base64?
Base64 converts binary data into plain ASCII text using 64 safe characters. It is commonly used to embed images in HTML, send files over JSON APIs, and encode credentials or tokens.
This tool encodes and decodes entirely in your browser — nothing is uploaded to a server.
Encode and Decode
Use the Encode tab to convert text or any file (up to 5 MB) to Base64. Enable URL-safe mode for use in URLs, or add line wrapping for email-safe output.
Use the Decode tab to paste a Base64 string and automatically see text, an image preview, or a hex dump for binary data.
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