Encode text to Base64 or decode it back in a couple of clicks. The safe for URL mode keeps encoded strings valid inside query parameters, and the whole conversion happens on one page.
Base64 is the format that lets binary data travel through text based systems. Email attachments, data URIs in CSS, authentication tokens, and API payloads all rely on it. When you see a long string of letters and numbers ending in an equals sign, you are looking at Base64 encoded content. Knowing how to read and produce it is a routine part of web development.
Most people hit a wall at the edges. Standard Base64 uses characters that can break URLs, so a token copied into a query string stops working or gets truncated. The safe for URL variant swaps those characters for alternatives and drops the padding. That small difference prevents a whole class of bugs that are painful to trace.
The value of a dedicated tool is speed and accuracy. Hand decoding a string is error prone, and jumping between browser tabs and console commands wastes time. A single form that encodes, decodes, swaps, and copies keeps the task inside one screen, which matters when you are debugging an API response mid sprint.
Choose a mode first. Encode takes plain text and turns it into a Base64 string. Decode takes a Base64 string and restores the original content. Paste your input, pick the mode, and transform. The result appears immediately with a character count so you can spot truncation before it becomes a bug.
Turn on the safe for URL option when the output will live in a query parameter, fragment, or filename. The tool adjusts the characters and removes padding automatically. For chained work, the swap button moves your result into the input field so you can decode what you just encoded or run a second transformation without copying anything.
Copy sends the final string to your clipboard in one click. Use clear when you want a fresh start. Between the two modes, the URL option, and the swap action, the tool covers the common encoding workflows without asking you to install anything.