Base64 Encoder Decoder

Base64 Tool is a fast, offline Base64 encoder and decoder built for developers and anyone who works with encoded data. Convert text and images to and from Base64 right on your phone — no internet, no servers, no data leaving your device.

What it does

• Text to Base64 and Base64 to text (UTF-8)

• Image to Base64: pick an image and get the Base64 string

• Base64 to image: paste a string and preview the decoded image

• URL-safe Base64 (RFC 4648) with optional padding removal

• Data URI output (data:image/png;base64,...) for embedding

• One-tap copy and paste

Why developers use it

• API tokens, Basic Auth headers, and data encoding on the go

• Embed images directly into HTML, CSS, or JSON as Data URIs

• Quickly check or debug an encoded string without opening a laptop

• A tool you reach for again and again — now always in your pocket

Privacy first

Everything runs locally on your device. Your text and images are never uploaded or shared. 100% offline.

Simple and clean

• Light and dark themes

• Clear two-tab layout: Text and Image

• Monospace output that's easy to read and select

This app is ad-supported with a small banner.