DevTools Logo

Base64 Toolbox

Base64 Toolbox

Encode and decode text, files and images locally with Base64, Base64URL, MIME and Data URI support

Text input

Enter text, Unicode, binary text or hexadecimal bytes.

Private by default: input is processed locally and is not saved. Press Ctrl/⌘ + Enter to run.

Try a sample:

About this tool

Encode and decode Base64 text, files and images online. Supports Base64URL, Data URIs and MIME — free, no signup, everything stays in your browser. Base64 Toolbox runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.

What this tool does not do

  • Base64 Toolbox is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.

How do I use this tool?

  1. How do I use Base64 Toolbox?

    Open Base64 Toolbox, enter or paste your input, and copy the result. The page works without an account.

Related guides

How Text Becomes Bytes: Binary, Hex, and UTF-8 Explained

What happens when you save a text file, how UTF-8 encodes characters, and why the same string can be different lengths in binary.

Gzip, Deflate, and CompressionStream: Browser-Native Compression

What RFC 1952 actually specifies, how gzip differs from zlib and deflate-raw, and how to use CompressionStream in modern browsers without any library.

URL Encoding Explained: A Practical Guide to Percent-Encoding

Why URLs can't contain spaces or special characters, how percent-encoding works, and how to avoid the classic pitfalls — double-encoding, + vs %20, and encodeURI vs encodeURIComponent.

Base64 Encoding Explained: What It Is and When to Use It

What Base64 actually does, why it exists, and when you should (and shouldn't) use it — covering the alphabet, padding, Base64URL, Data URIs, and common mistakes.

Related tools

C# to VB.NET Converter

Convert a subset of C# — classes, methods, variables, loops — into VB.NET

CSV Data Viewer

Paste CSV and browse rows in a sortable table with delimiter detection

CSV to Chart

Paste or upload CSV data and generate bar, line, pie, or doughnut charts. Export as PNG.

CSV to JSON Converter

Paste CSV data and convert it to pretty-printed JSON instantly — supports custom delimiters, header row toggling, and value trimming.

CSV to Markdown Converter

Convert CSV to a Markdown table and Markdown tables back to CSV

CSV to SQL Converter

Generate SQL INSERT statements from CSV data