Online URL Encoder & Decoder

Encode and decode Base64 strings and images securely offline.

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Introduction

Format URLs and API query strings safely by converting special characters into percent-encoded formats, or decode them back into readable text.

What is the URL Encoder and Why Use It?

URLs can only be sent over the internet using the ASCII character set. If your URL or API payload contains spaces, symbols, or foreign characters, the browser will break. URL Encoding (Percent-encoding) solves this by converting unsafe characters into a `%` followed by two hexadecimal digits (for example, a space becomes `%20`). Our tool allows you to safely encode payloads for HTTP GET requests, or decode messy, unreadable analytics strings back into plain text. Executed entirely locally, your API tokens and query strings remain secure.

Key Features

  • 100% Client-Side Privacy: Query strings frequently hold sensitive session IDs or API keys. Your data is processed locally and never sent to a server.
  • Strict RFC Compliance: Properly handles all reserved and unreserved characters, utilizing the standard `encodeURIComponent` algorithm.
  • Instant Translation: Type or paste your string and watch it encode/decode in real-time as you type.
  • Safe Space Handling: Correctly maps spaces to `%20` or `+` based on standard web application specifications.

How to Use the URL Encoder (Step-by-Step)

  1. Step 1: Paste your URL or query string parameter into the text box.
  2. Step 2: Click "Encode" to make the text safe for web transmission, or "Decode" to translate a messy `%20` filled string back to normal.
  3. Step 3: Click the copy icon to instantly grab your formatted string.

Frequently Asked Questions

The internet's HTTP protocol strictly requires URLs to be in the ASCII format. Special characters, spaces, and reserved symbols (like `&`, `=`, `?`) will break the routing if they are part of a data value rather than the URL structure.

You should typically only encode the values inside your query strings. Encoding an entire URL (including the `https://`) will break the protocol prefix and cause routing failures.

No. The encoding logic is handled entirely by your browser's local JavaScript. We do not track or log your URLs.