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Base64 Text & Image Converter

100% Private — No Data UploadedRuns Instantly in Your BrowserZero Server Processing
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Processed Locally

Your strings and images are parsed entirely inside your browser cache and never touch the internet. No server uploads, no data logging, no third-party access.

How the Base64 Text & Image Converter Works

Our Base64 Text & Image Converter is a fast, privacy-first utility designed for web developers, API engineers, and content creators who need to encode or decode Base64 data without ever uploading sensitive information to a remote server. The tool is split into two powerful workspaces: a text encoder/decoder and an image-to-DataURI converter.

The Text Converter uses the browser-native TextEncoder and TextDecoder APIs combined with btoa and atob to guarantee full UTF-8 compatibility. This means emojis, non-Latin scripts, mathematical symbols, and any valid Unicode text are encoded to Base64 and decoded back without data corruption. Simply paste your source text on the left, click Encode or Decode, and the result appears instantly on the right.

The Image to Base64 workspace leverages the browser-native FileReader API to read image files completely offline within your device memory. Drag and drop any PNG, JPEG, GIF, WebP, SVG, or BMP file onto the dropzone, and the tool instantly generates a complete DataURI string (e.g., data:image/png;base64,...) ready to paste into HTML img tags, CSS background properties, JSON API payloads, or localStorage. A live image preview is shown alongside the generated code for visual confirmation.

Everything runs entirely in your browser. Your text, strings, and image files are never transmitted, logged, or stored on remote servers. This makes our Base64 Converter ideal for encoding sensitive API credentials, embedding images in offline HTML documents, or working in air-gapped and high-security environments.

Why Use Our Base64 Converter?

UTF-8 Safe Encoding

Encode any Unicode text — emojis, Chinese, Arabic, math symbols — without data loss using native TextEncoder APIs.

Image to DataURI

Convert PNG, JPG, GIF, WebP, SVG, and BMP files to Base64 DataURI strings instantly via offline FileReader.

Zero Server Contact

Your text and images are processed entirely inside your browser. Nothing is uploaded, logged, or shared.

Developer-First UX

Dual-pane workspace, monospace output, instant encode/decode buttons, one-click copy, and live image preview.

Works Offline

Once loaded, the converter runs without any internet connection. Perfect for secure and air-gapped networks.

One-Click Copy

Copy encoded strings or full DataURI codes to your clipboard instantly with a single button tap.

Frequently Asked Questions

Is this Base64 Converter free to use?
Yes, our Base64 Text & Image Converter is completely free to use with no hidden fees, no sign-ups, and no usage limits. Encode, decode, and convert as much data as you need, as often as you need.
Is my data safe when using this tool?
Absolutely. This Base64 Converter runs entirely in your browser using client-side JavaScript. Your text, strings, and images are never uploaded to any server, stored in a database, or shared with third parties. Image conversion uses the browser-native FileReader API and processes files completely offline within your device memory.
What is Base64 encoding and when should I use it?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used to embed images directly into HTML or CSS as DataURIs, encode API payloads, transfer binary data over text-only channels like JSON, and store small binary assets in localStorage or cookies.
Does the text encoder support Unicode and special characters?
Yes. Our text encoder uses UTF-8 safe encoding via the browser-native TextEncoder and TextDecoder APIs. This means emojis, Chinese characters, Arabic script, mathematical symbols, and any valid Unicode text are correctly encoded to Base64 and decoded back without data loss.
What image formats are supported for conversion?
The image-to-Base64 converter supports PNG, JPEG/JPG, GIF, WebP, SVG, and BMP files. The output is a complete DataURI string (e.g., data:image/png;base64,...) ready to paste into HTML img tags, CSS backgrounds, or API payloads.
Does this tool work offline?
Yes. Once the page is loaded, the Base64 Converter functions entirely within your browser and does not require an internet connection to encode text, decode strings, or convert images. Perfect for working on airplanes, in secure environments, or with spotty WiFi.

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