Free Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to readable text instantly. Supports Unicode, multilingual text, URL-safe Base64, and local file processing — free, directly in your browser.
Encoding Workspace
URL-safe mode uses - and _ instead of + and /. Padding is optional when decoding.
Output & Results
Encode a Text File
Select a small text file to encode its contents. Processing happens in your browser.
Base64 Quick Reference
Encode: Convert text into a Base64 representation.
Decode: Convert valid Base64 data back into text.
Unicode: UTF-8 encoding preserves emojis and characters from languages such as Arabic, Chinese, and Japanese.
URL-safe Base64: Replaces two characters so the result is more suitable for URLs and filenames. It is not a security feature.
Important: Base64 is an encoding format, not encryption. Never use it to protect passwords, API keys, or confidential data.
Frequently Asked Questions
What is Base64 encoding?
Base64 represents binary data using a set of 64 ASCII characters. It is commonly used in data exchange, email, APIs, and embedding content in text-based formats.
Is this Base64 tool free?
Yes. Encoding and decoding run in your browser without a paid subscription, API key, or dedicated processing server.
Is Base64 secure encryption?
No. Anyone who has a Base64 string can decode it. Use established encryption and proper key management when confidentiality is required.
Does Base64 support Arabic and emojis?
Yes. This tool encodes text as UTF-8 bytes before converting those bytes to Base64, preserving Arabic, emojis, and other Unicode characters.
Why does decoding sometimes fail?
The input may contain invalid characters, malformed padding, or bytes that are not valid UTF-8 text. This tool validates Base64 input and reports decoding errors instead of silently replacing invalid text.
Does this tool upload my text or files?
No. The encoding, decoding, and text-file processing are performed locally by your browser. No application API or server upload is required.