Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 back to text instantly. Supports UTF-8 characters. Free, private, no signup needed.
How to Encode and Decode Base64 Online
Open the Base64 Encoder/Decoder
Navigate to the tool. Works instantly with no login.
Choose your mode
Click Encode to convert text to Base64, or Decode to convert Base64 back to text.
Enter your data
Type or paste your input. The output updates in real-time as you type.
Copy the result
Click Copy to copy the output. Use Swap to quickly switch between encode and decode.
Pro Tips
- •Base64 encoding increases data size by approximately 33 percent. This is normal.
- •The tool handles UTF-8 characters correctly, including emojis and non-Latin scripts.
- •Use the Swap button to quickly decode something you just encoded.
- •Invalid Base64 strings will show an error when decoding.
When to Use Base64 Encoder/Decoder
API development
Encode authentication tokens and API keys in Base64 for HTTP headers.
Data URIs
Create Base64 data URIs for embedding small images and fonts in HTML and CSS.
Debugging
Decode Base64 strings found in logs, API responses, or configuration files.
JWT inspection
Decode the Base64-encoded payload of JSON Web Tokens to inspect claims.
Frequently Asked Questions
What is Base64 encoding?
Base64 encodes binary data using 64 printable ASCII characters. It is used to safely transmit data through text-only channels like email, URLs, and JSON.
Does it support Unicode?
Yes. The tool properly handles all UTF-8 characters including emojis, Chinese characters, and Arabic script.
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode it. It provides no security, only data transport compatibility.
Base64 Encoder/Decoder vs Alternatives
Base64 encoding and decoding is a fundamental developer utility used daily in web development and API work.
base64encode.org
Dedicated Base64 website
Key difference: Uploads data to servers. Ads on the page.
Browser DevTools Console
Built-in btoa/atob functions
Key difference: Requires JavaScript knowledge. No UTF-8 support without workarounds.
Encode and decode Base64 instantly in your browser. Full UTF-8 support, real-time conversion, one-click copy. No uploads, no ads, no account.
Key Features
100% Free
No hidden fees, no premium tiers, no limits on how much you use it. Free today, free tomorrow, free forever.
Complete Privacy
Your files never leave your device. Everything is processed locally in your browser — we physically cannot access your data.
No Registration
Start using the tool immediately. No account, no email, no personal information required. Just open and use.
Works Everywhere
Compatible with Chrome, Firefox, Safari, and Edge on desktop and mobile. Works offline once the page has loaded.