Base64 Encoder & Decoder
Encode & decode Base64 online - text, images aur files. UTF-8 safe (emoji/Hindi supported), URL-safe option, data URI generator. Free & 100% private.
What is Base64 Encoding?
Base64 ek encoding scheme hai jo binary data ko 64 ASCII characters (A-Z, a-z, 0-9, +, /) ke text string mein convert karti hai. Iska use binary data ko text-based systems - JSON, XML, email (MIME), HTML data URIs - ke through safely transmit karne ke liye hota hai.
⚠️ Important: Base64 encoding hai, encryption nahi. Koi bhi ise instantly decode kar sakta hai - passwords ya sensitive data protect karne ke liye kabhi use mat karo.
Common Base64 use cases:
- Data URIs - Chhoti images ko HTML/CSS mein directly embed karna (HTTP requests bachte hain).
- APIs & JSON - Binary files (images, PDFs) ko JSON payloads mein bhejwana.
- JWT tokens - Authentication tokens ke header/payload URL-safe Base64 mein hote hain.
- Email attachments - MIME encoding attachments ko Base64 mein convert karta hai.
- Basic Auth - HTTP Authorization headers mein credentials Base64 encoded hote hain.
How to Use Base64 Images in HTML & CSS
File tab se image upload karke data URI copy karo, phir directly embed karo:
Kab use karein: Sirf chhoti images (icons, logos < 5KB) ke liye - HTTP request bachta hai. Badi images ke liye normal files better hain kyunki Base64 size ~33% badha deta hai aur caching nahi hoti.
Frequently Asked Questions (FAQ)
What is Base64 encoding?
Binary data ko 64 ASCII characters ke text mein convert karne ki scheme - JSON, email, data URIs mein binary data safely bhejne ke liye. Yeh encryption nahi hai, security nahi deta.
How do I decode a Base64 string?
Base64 string input mein paste karo aur Decode click karo. Full UTF-8 support hai - special characters, emojis aur Hindi text bhi correctly decode hota hai.
How do I convert an image to Base64?
File tab mein image upload karo. Base64 string + ready-to-use data URI milta hai jo directly HTML img tags ya CSS mein embed ho sakta hai.
Is Base64 encryption? Is it secure?
Nahi. Base64 encoding hai, encryption nahi - koi bhi instantly decode kar sakta hai. Passwords/sensitive data ke liye proper encryption (AES) use karo.
What is URL-safe Base64?
Standard Base64 ke + aur / URLs mein problems create karte hain. URL-safe version + ko - se aur / ko _ se replace karta hai - URLs, filenames aur JWT tokens ke liye.