Simple Base64 Converter — Image ↔ Text

Quickly convert images to Base64 text and back. Simple, offline, and permission-free.

Simple Base64 Converter is a lightweight offline tool that instantly converts images to Base64 text — and back again. Select an image to generate its Base64 string, or paste a Base64 string to preview and decode it back into an image. Everything happens locally in your browser — no uploads, no permissions, no privacy concerns. Key features Encode any image file (PNG, JPG, WebP, etc.) into a Base64 data string. Decode Base64 text back into a viewable image preview. Copy Base64 results with one click. Clear everything instantly to start over. Works fully offline and stores nothing anywhere. Fast, minimal design optimized for everyday use. Privacy & safety No network access, tracking, or external dependencies. No permissions required — runs entirely within the popup. 100% CSP-compliant and MV3-ready. Ideal for developers, designers, and anyone who needs a quick Base64 encoder/decoder without complex options.