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Base64 Encoder & Decoder
Turn text (or images) into Base64 and back again, instantly, no server involved.
🟢 EasyDifficulty
45-75 minutesTime
Python, JavaScriptLanguages
What you're building
A two-way Base64 converter: type text and get its Base64 encoding, or paste Base64 and decode it back to text. You'll also add a mode that lets you drop in an image and see it converted to a Base64 data URL — the same trick used to embed small images directly inside CSS or HTML.
What you'll unlock 🔓
You'll need
- Basic JavaScript
- A browser
🗺️ Build roadmap
01 Build the encode/decode text panels
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02 Implement text-to-Base64 with btoa
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03 Implement Base64-to-text with atob
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04 Handle invalid Base64 input gracefully
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05 Support Unicode text properly
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06 Add an image-to-Base64 mode with FileReader
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07 Add copy buttons and polish
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