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Developer Tools

Base64 & Hex Encoder / Decoder

100% Client-Side. Your text and files are processed strictly in your browser and never uploaded.
Sample Presets:
Input DataTEXT
51 chars • 53 bytes or drag & drop any file here (images, PDF, documents, binary)
Converted OutputBASE64Valid Format
72 chars • 53 bytes Size Change: 100%
Input Size53 B
→
Output Size53 B
Size Change100%

How to Encode and Decode Base64 & Hexadecimal

A quick reference for encoding data across web development, APIs, and cryptography.

1. Choose Conversion Formats

Select your source input format (Plain Text UTF-8, Base64, Base64URL, Hex, or Binary) and the desired output format.

2. Paste Data or Upload Files

Type or paste your data directly into the input editor, or drag and drop any image, document, or binary file to encode it directly.

3. Customize Delimiters & Formatting

Adjust hex byte separators (spaces, commas, colons, or C-array syntax), letter case (uppercase / lowercase), 0x prefixes, and line wrapping.

4. Copy or Download Instantly

Copy the result to your clipboard with one click, or download the decoded binary file directly to your device.

Frequently Asked Questions

What is Base64 encoding used for?

Base64 (RFC 4648) represents binary data in an ASCII string format by translating it into a radix-64 representation. It is widely used in MIME email attachments, data URIs for inline images in HTML/CSS, and embedding binary signatures in JSON payloads.

What is the difference between Base64 and Base64URL?

Standard Base64 uses + and / characters with = padding. Base64URL replaces + with - and / with _ so the encoded string can safely appear in URLs, filenames, and JWT tokens without escaping.

Does this tool support Unicode and emojis?

Yes. All text conversions use UTF-8 byte encoding via the native Web TextEncoder and TextDecoder APIs, ensuring symbols, accented characters, CJK characters, and emojis encode and decode with 100% precision.

Is my data secure when encoding files or sensitive strings?

Yes, completely. DevsLoad operates 100% client-side in your web browser. Neither your input strings nor uploaded files are transmitted across the network or stored on any server.

How does Hexadecimal (Base16) encoding work?

Hexadecimal encodes each byte (8 bits) as two characters from 0 to F (0-9 and a-f). DevsLoad supports clean hexadecimal strings, space-delimited bytes, comma-separated lists, and C/C++ style array initializers with 0x prefixes.