Base64 Encoder & Decoder
Convert UTF-8 text and binary files to Base64 or Data URLs, then validate, inspect, preview, and download decoded results without uploading anything.
Source to encode
Choose UTF-8 text or pick any local binary file from your computer.
Encoding estimate
Source: 84 B → Encoded: ~112 B (+33%)
How Our Base64 Tool Works
Follow these three steps to encode or decode text and binary files directly on your device.
Choose Mode & Input
Select Encode or Decode mode, then type text or drag and drop any file up to 20 MB directly into the tool.
Configure Options & Format
Switch between standard RFC 4648, URL-safe Base64, or complete Data URLs with automatic MIME type detection.
Copy Output or Download File
Copy formatted string output to your clipboard with one click, or download decoded binary assets safely to your disk.
Key features
Reliable Base64 utilities designed for web developers, designers, and security professionals.
Text & File Encoding
Encode UTF-8 prose or local binary files into standard RFC 4648 Base64, URL-safe Base64, or complete Data URLs ready for HTML and CSS.
Safe Decoding & File Downloads
Inspect incoming Base64 strings for validity and length, preview readable UTF-8 text, or download decoded binary files with automatically detected MIME extensions.
Browser-Local Processing
Your files are processed directly in your browser and are not uploaded to Pinatool's servers.
Frequently Asked Questions
Common questions about Base64 encoding, Data URLs, and file security.
Is Base64 secure for sensitive data?
Base64 is an encoding format, not encryption. Anyone can decode a Base64 string without a password or secret key. Do not use it to protect sensitive information.
Does encoding or decoding upload files to a server?
No. The entire process runs locally in your browser memory. No files, passwords, or text snippets are ever transmitted over the network.
What is the maximum file size supported?
You can encode or decode files up to 20 MB locally without slowing down your browser.
What is the difference between standard and URL-safe Base64?
Standard Base64 uses "+" and "/" characters which have special meanings in web addresses. URL-safe Base64 replaces "+" with "-" and "/" with "_", and can omit trailing "=" padding.
Can this tool decode Data URLs?
Yes. It automatically recognizes data:image/png;base64,... and other Data URL formats, identifies the file type, and prepares the decoded file for preview and download.
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