🔤 URL / Base64 Encoder
Encode and decode URLs and Base64 strings. Supports UTF-8. All processing happens in your browser.
💡 About This Tool
URL encoding: converts special characters into %XX format. Example: "hello world" → "hello%20world".
Base64 encoding: converts binary or text data into a printable ASCII string. Example: "Hello" → "SGVsbG8=".
Both modes support UTF-8.
About
Overview
Data encoding is a fundamental task for web developers, data analysts, and security researchers. Our URL & Base64 Encoder/Decoder is a fast, reliable, and 100% secure tool that allows you to translate data between human-readable formats and web-safe strings.
What is URL Encoding?
URL encoding (also known as percent-encoding) is used to convert special characters into a format that can be safely transmitted over the internet. For example, spaces are converted to %20, and characters like ? or & are encoded so they don't break a URL structure. This is essential when passing parameters through query strings.
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme. It takes binary data (like images, files, or encrypted text) and translates it into a string of printable ASCII characters. Base64 is commonly used to embed images directly into HTML/CSS, or to transmit data securely via JSON and XML APIs.
Frequently Asked Questions (FAQ)
Is my data uploaded to your servers?
No. This tool runs entirely in your browser using client-side JavaScript. Your text, URLs, and Base64 strings never leave your device, ensuring complete privacy and security for sensitive data.
Does it support UTF-8 characters?
Yes. Our encoder safely handles UTF-8 characters. Whether you are encoding Chinese characters, Emojis, or Arabic text, the Base64 output will be perfectly formatted to decode back to the original string.
Is Base64 a form of encryption?
No. Base64 is an encoding scheme, not encryption. It does not use a key and provides no security. Anyone can easily decode a Base64 string. It is used for data formatting and transmission, not for hiding sensitive information.
Why do I get a "Decoding failed" error?
If you are using Base64 mode and see a decoding error, it means the input string contains invalid characters or is missing padding (the = signs at the end). Ensure you are decoding a valid Base64 string.