Is my data safe when using this Base64 converter?

Yes. This tool runs 100% in your local browser memory using client-side JavaScript. No data, API keys, or text payloads are sent to any external server.

What is URL-safe Base64 encoding?

Standard Base64 contains characters like '+' and '/' which have special meanings in URLs. URL-safe Base64 replaces '+' with '-' and '/' with '_' to prevent URL parameter encoding issues, and optionally strips the trailing padding '=' signs.

Which text encoding should I choose?

UTF-8 is the standard encoding for modern web systems. ASCII is suitable for plain English strings. Hexadecimal is useful when you want to convert raw bytes in hex format (e.g. key hashes) directly to Base64.

Base64 Encoder & Decoder

Instantly encode raw text or files to Base64, or decode Base64 data back to clear text. Works 100% locally in your browser for absolute data security.

Utilities Data Formats 🟢 Active 🔒 100% Client-Side

Character Encoding

URL-Safe Base64

Use URL-safe (`-`, `_`)

Output Formatting

Source Input

Converted Output

Input Character Count: 0

Input Byte Size: 0 B

Lines Count: 0

Output Character Count: 0

Output Byte Size: 0 B

Status: Ready

Getting Started

How to Use the Base64 Converter

Follow these quick steps to encode or decode your text and files locally in your browser.

Step 1: Choose Mode

Select either "Encode" (Text to Base64) or "Decode" (Base64 to Text) using the top pill selector.

Step 2: Configure Options

Set character encoding (UTF-8, Hex, etc.) and toggle URL-Safe or output line wrapping preferences.

Step 3: Provide Input

Type/paste content in the Input Panel, or toggle to File Upload to read text files directly.

Step 4: Copy or Download

Watch results compute in real time, then copy to clipboard or download as a standalone file.

FAQ

Frequently Asked Questions

Is my data sent to any server?

No. The tool processes all inputs directly inside your browser. No data, payloads, keys, or text contents ever leave your local computer.

Why use URL-Safe Base64?

Standard Base64 encoding utilizes character symbols such as '+' and '/' which carry operational meanings in URL query strings. Converting to URL-safe options replaces these symbols with '-' and '_' to prevent transmission corruption.

Does this support emoji and special characters?

Yes. When using the default UTF-8 Character Encoding setting, the encoder and decoder handle multi-byte Unicode strings (including emojis and international glyphs) correctly without character loss.

What is Hexadecimal mode useful for?

Hex mode is ideal for cryptographic keys and digests. You can input raw hexadecimal byte strings (like hash outputs) and encode them into Base64, or decode Base64 back into hex bytes.

Learn More

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