< class="breadcumb-title text-anim" data-cue="slideInUp" data-delay="300">Base64 Encode
Free Base64 Encoder & Decoder | Text, Image & File Converter | ASLI FORM

Base64 Converter

Encode text or files into Base64, or decode Base64 strings back to their original format. Choose between standard and URL-safe formats.

Plain Text / JSON
Characters: 0
Bytes: 0 B
Base64 String
File preview
Characters: 0
Bytes: 0 B
Overhead: 0%

World-Class Base64 Features

Built for developers, designers, and security professionals who need reliable, fast, and private Base64 conversion without server-side risks.

  • Full UTF-8 & Emoji SupportUses modern TextEncoder/TextDecoder to perfectly handle Hindi, Chinese, Arabic, emojis, and all Unicode characters.
  • File to Base64 & Vice VersaEncode images, PDFs, or any file into a Data URI string, or decode a Base64 string back into a downloadable file.
  • URL-Safe Base64Automatically replaces '+' with '-' and '/' with '_' for safe use in URLs, filenames, and JSON payloads.
  • Real-Time ProcessingInstant conversion as you type, with debouncing to ensure smooth performance even on large texts.
  • 100% Private & SecureAll processing happens locally in your browser via JavaScript. Your data never touches our servers.
  • Smart FormattingOptional line wrapping (64 or 76 characters) for RFC-compliant, readable output, plus automatic Data URI prefixing.

How to Use the Base64 Tool

Convert your data in seconds with these simple steps.

  • 1
    Select Your ModeChoose 'Text Mode' for strings and code, or 'File Mode' for images, PDFs, and documents.
  • 2
    Choose Encode or DecodeSelect 'Encode' to turn data into Base64, or 'Decode' to revert a Base64 string back to its original form.
  • 3
    Configure OptionsEnable URL-safe formatting, Data URI prefixes, or line wrapping based on your specific use case.
  • 4
    Copy or DownloadClick 'Copy' to grab the result instantly, or 'Download' to save the decoded file directly to your device.

Frequently Asked Questions

Base64 is used to represent binary data (like images or files) as an ASCII string. This is essential for embedding images directly in HTML/CSS, sending binary data in JSON APIs, or storing complex data in text-only databases.
Absolutely. This tool runs 100% client-side in your browser. Your text and files are never uploaded to any server, making it perfectly safe for sensitive data, passwords, or proprietary code.
Standard Base64 uses the characters + and /, which have special meanings in web URLs and can break links. URL-Safe Base64 replaces these with - and _, and removes the = padding, making it completely safe for web addresses and filenames.
Yes. Unlike older tools that corrupt Unicode, our encoder uses the modern TextEncoder and TextDecoder APIs, ensuring perfect handling of emojis, Hindi, Chinese, Arabic, and all other global characters.
For optimal browser performance, we recommend keeping files under 50MB. Larger files may cause the browser tab to slow down during the Base64 string generation process.
Base64 encoding inherently increases data size by approximately 33%. This is because every 3 bytes of binary data are represented by 4 ASCII characters. The tool displays this overhead in the stats bar for your reference.

Share This Tool

Know a developer or designer who needs a reliable Base64 converter? Share this free tool with them.

Share on:

Need Expert Assistance or Custom Tools?

Our expert team is available 24/7 to help you with documentation, registration, and custom digital service needs. Get instant support via call or WhatsApp!

Call: +91 7011993433 WhatsApp Us