🔤 Encoder / Decoder
Encode and decode Base64 and URL strings. Useful for inspecting email links, data URIs, and encoded payloads. Runs entirely in your browser.
About the Encoder / Decoder
This tool encodes and decodes text between common formats such as Base64 and URL encoding. These formats are everywhere in web development, email, and APIs, where data often needs to be transformed into a safe, transmittable form and back again.
Developers and security researchers constantly need to decode a Base64 string, inspect a URL-encoded parameter, or encode a value for testing. Doing it in the browser, without pasting sensitive data into a random online box, keeps the process fast and private.
Paste your text, choose the operation, and get the result instantly. The conversion happens on request and nothing is stored.
Frequently asked questions
What is Base64 encoding?
Base64 represents binary or text data using a set of 64 characters, making it safe to transmit in contexts that only support text, such as email attachments or data URLs. It is encoding, not encryption.
What is URL encoding?
URL encoding (percent-encoding) replaces characters that are unsafe in URLs with a percent sign and their code, such as a space becoming %20, so the data survives being placed in a web address.
Is Base64 secure?
No. Base64 is reversible encoding, not encryption, so anyone can decode it. Never use it to protect secrets; use proper encryption for that.