Encode and decode Base64 strings online for web development APIs data processing and digital workflows with a fast and convenient browser based tool.
Base64 Encoder/Decoder converts plain text into Base64-encoded format, or decodes an existing Base64 string back into readable text — a common need for developers working with APIs, data URIs, or encoded configuration values. Type or paste your text or Base64 string, choose the direction of conversion, and get the result instantly. It's a handy utility for debugging encoded API payloads, preparing data for systems that require Base64, or simply understanding what an encoded string actually says.
Paste your text into the box. Both directions run locally in your browser — nothing is sent anywhere.
Encode to turn plain text into a Base64 string, or decode to read one back.
Special characters and accents convert correctly thanks to UTF-8 handling.
Copy the result — handy for API payloads, basic auth headers, and config files.
Two-way conversion with correct UTF-8 handling, instant results, and zero data leaving your browser.
Switch between converting text to Base64 and back.
See the converted output immediately as you type.
Debug API payloads and encoded data URIs.
Conversion happens in your browser — nothing is uploaded.
Encode and decode unlimited text at no cost.
It's commonly used to safely represent binary or text data in formats like URLs, JSON, and data URIs.
Yes, you can switch the tool to decode mode to convert a Base64 string back to readable text.
Yes, this tool is completely free with no limit on how much text you convert.
Yes, the tool handles standard text encoding, including most special characters.
No. Conversion happens entirely in your browser, so your data stays private.
Base64 Encoder Decoder Online Tool