Base64 Tools
Editable source on the left, read-only result on the right. Base64 is encoding, not encryption. All processing runs in your browser.
What is Base64 Encode/Decode?
Base64 Encode/Decode is an online tool that converts binary data and text into Base64 strings and back. Base64 encoding represents binary data using only ASCII characters, making it safe to embed images in HTML, transmit data in JSON, or store binary content in text-based formats like XML and email.
Developers encounter Base64 daily: JWT tokens use Base64URL encoding, API responses may include Base64-encoded files, and CSS often embeds small images as data URIs. Understanding when and how to encode and decode Base64 prevents subtle bugs in authentication flows and data pipelines.
WaiHub's Base64 toolkit includes four modules: core encode/decode, file tools with image preview, format conversion (Hex, Data URI), and utilities. Everything runs in your browser — your files and text never leave your device, which is essential when handling credentials or sensitive payloads.
- Encode and decode text instantly
- URL-safe Base64 for JWT and query parameters
- File upload with image preview
- Convert between Base64, Hex, and Data URI
- Smart auto-detect for encode vs decode
- Privacy-first — no server upload required
Features
- Encode text to Base64 instantly
- Decode Base64 back to readable text
- URL-safe Base64 mode (- and _ instead of + and /)
- Upload files and encode to Base64
- Preview Base64-encoded images inline
- Convert Base64 ↔ Hex ↔ Data URI
- Smart detect: auto-switch encode/decode
- Copy result with one click
- Four modules: core, file, convert, utilities
- Works locally in browser — no data upload
How To Use
Enter text or upload a file
Paste text in the source panel or upload a file in the File module. Toggle URL-safe mode for JWT-style encoding when needed.
Choose encode or decode
Click Encode to convert text to Base64, or Decode to reverse the process. Smart Detect automatically picks the right direction.
Review the result
The result panel shows the output. For images, use the File module to see a live preview of decoded content.
Copy or convert further
Copy the result, or switch to the Convert module to transform between Base64, Hex, and Data URI formats.
Examples
Text encoding
Input
Hello, WaiHub!Output
SGVsbG8sIFdhaUh1YiE=Text decoding
Input
SGVsbG8sIFdhaUh1YiE=Output
Hello, WaiHub!FAQ
- Is this Base64 tool free?
- Yes. Completely free with no signup or usage limits.
- Is my data uploaded to your servers?
- No. Encoding and decoding happen entirely in your browser.
- Is Base64 encryption?
- No. Base64 is encoding, not encryption. Anyone can decode it — do not use it for security.
- What is URL-safe Base64?
- Uses - and _ instead of + and /, suitable for URL parameters and JWT tokens.
- Can I use it commercially?
- Yes. Free for personal and commercial use.
- How do I preview Base64 images?
- Use the File module — paste or upload image Base64 for instant inline preview.