Developer Tool
Base64 Encoder & Decoder
Encode text or files to Base64 and decode Base64 strings back to plain text instantly. 100% client-side — your data never leaves the browser.
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What is Base64 Encoding?
Base64 is an encoding algorithm that translates any characters, binary data, or even images into a readable string format consisting of 64 characters (A-Z, a-z, 0-9, +, and /). It is commonly used in programming and web development to transmit data across networks without corruption, embed images directly into CSS or HTML, or securely send credentials in Basic HTTP Authentication.
How to use this tool
Simply paste your text or click Encode File to upload an image or document. The tool will instantly convert your input. You can easily toggle between Encodeand Decode modes, or swap the inputs with the middle button.
If you need the output for a URL or filename, switch from Standard to URL-Safe mode. This replaces the + and / characters with - and _ respectively, preventing URL parsing errors.
Is my data secure?
Yes. This tool runs 100% locally in your browser. Your input text and files are never sent to a server. We use the browser’s native btoa() and atob()functions, meaning your sensitive API keys, passwords, and data stay completely private.