Base64 Encoder & Decoder Online (Free Tool)
Encode text to Base64 or decode any Base64 string instantly. Works entirely in your browser—supports Unicode, emojis and special characters with 100% privacy.
Encode • Decode • Supports Unicode & emojis • 100% client‑side • No upload • Private
Free Base64 Encoder & Decoder Online Tool (UTF‑8 & URL‑safe)
Use our free Base64 encoder and decoder to instantly convert text to Base64 or decode Base64 strings back to readable text. It works entirely in your browser — no data is uploaded, ensuring full privacy. Ideal for developers, API testing, JSON encoding and secure data transmission.
How to Encode or Decode Base64
1. Enter your text in the input box (plain text to encode or Base64 string to decode).
2. Click "Encode to Base64" or "Decode from Base64".
3. Optionally enable URL‑safe mode for web‑friendly Base64.
4. Copy the result with one click.
5. Use Swap to quickly reverse input/output.
Features of This Base64 Tool
- ️ Full UTF‑8 support (emojis, non‑Latin characters, JSON)
- ️ URL‑safe Base64 (RFC 4648) – replaces +/ with -_ , removes padding
- ️ Instant encode/decode – no server roundtrips
- ️ 100% client‑side & secure – your data never leaves your device
- ️ Copy output, swap fields, clear all – smooth UX
- ️ Works on desktop and mobile, no installation required
Why Use This Base64 Encoder/Decoder?
Base64 is essential for embedding images in HTML/CSS, transmitting binary data in JSON APIs, email attachments and storing tokens. Our tool handles all edge cases, including Unicode characters and provides a clean interface with helpful examples.
Why Choose Our Base64 Encoder?
| Feature | Our Tool | Typical Online Tools |
|---|---|---|
| Data Privacy | 100% Client-side | Data uploaded to server |
| Speed | Instant processing | Slower response |
| UTF-8 Support | Full support (emoji, unicode) | Limited support |
| URL-safe Mode | ✔️ Built-in | Often missing |
| Cost | Free, no limits | May have limits |
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