Detected: plain text → encode
File to Base64
Drag & drop an image or PDF to get a Base64 data URI
PNG, JPG, GIF, WebP, PDF supported
Input: 26 bytes → Output: 36 bytes (38% larger)
This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.
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The URL Decoder tokenizes and validates input against the relevant specification (RFC, W3C, or language standard). Syntax errors include line/column hints when the format supports positional parsing.
Input passes through a deterministic transform pipeline: normalize → validate → format/encode → output. The same input always produces identical output with no server round-trip.
Special characters, Unicode code points, and escape sequences are handled per the target format's rules. Output preserves semantic meaning while conforming to structural requirements.
Updated: July 2026
A backend developer pastes a malformed payload into the URL Decoder during an incident to locate syntax errors before redeploying.
Before opening a pull request, an engineer runs config files through the URL Decoder to enforce consistent formatting across the team.
A technical writer uses the URL Decoder to produce clean, readable examples for internal API documentation.
Use our free URL Decoder for fast, accurate results in your browser. No signup or installation required — works on any device.