Encode text to Base64 or decode Base64 strings back to text. Supports URL-safe Base64. Instant, free, no sign-up. By WeLuvTools.
What is Base64 Encoder & Decoder — Encode & Decode Online Free?
WeLuvTools Base64 Encoder & Decoder converts text to Base64 encoding and decodes Base64 strings back to plain text instantly in your browser.
About Base64 Encoder & Decoder — Encode & Decode Online Free
WeLuvTools Base64 Encoder & Decoder converts text to Base64 encoding and decodes Base64 strings back to plain text instantly in your browser. Base64 is an encoding scheme that converts data into 64 ASCII characters — widely used in HTTP Basic Auth headers, JSON API payloads, JWT tokens, email MIME attachments, and data URLs. WeLuvTools supports both standard Base64 (RFC 4648) and URL-safe Base64 (uses - and _ instead of + and /) for use in URLs, filenames, and JWT. Your text never leaves your browser.
100% Private
Files stay on your device.
Super Fast
Results in just a few seconds.
Secure & Safe
No account or upload needed.
Practical Limits
Capacity depends on your device.
Practical scenarios
Use cases
Common ways people get more value from this tool.
Use case 1
Encoding Basic Auth credentials (username:password) for HTTP Authorization headers
Use case 2
Decoding Base64 strings from JWT token payloads to read the claims
Use case 3
Encoding binary data for inclusion in JSON API request bodies
Use case 4
Encoding email attachments in MIME/Base64 format
Use case 5
Encoding images as data URLs for embedding directly in HTML or CSS without a file request
Types & formats
Standard Base64
Uses + and / — RFC 4648 standard encoding for general use
URL-safe Base64
Uses - and _ instead of + and / — safe for URLs, JWT, and filenames without percent-encoding
The WeLuvTools difference
Why choose WeLuvTools
Benefit 1
Supports both standard Base64 and URL-safe Base64 in one tool
Benefit 2
Instant encode and decode — results appear immediately as you type
Benefit 3
WeLuvTools processes Base64 entirely in your browser — your text stays private
Benefit 4
Handles large strings without performance issues
Benefit 5
Free to use without creating an account; practical capacity depends on your browser and device.