URL Encoder / Decoder

Encode special characters into RFC3986 URL safe format or decode percent-encoded URLs.

Encode Components (Special chars) Spaces as "+"

Enter Text or URL:

Result:

How to Use this Tool

1. Paste your URL, query string, or plain text into the input box. 2. Click 'Encode' to convert special characters to URL-safe percent-encoding, or 'Decode' to revert to readable text. 3. Click 'Copy Result' to copy the processed output to your clipboard.

Mathematical Formula & Explanation

RFC 3986 Percent-Encoding Algorithm: 1. Character Evaluation: Determine if character belongs to Unreserved set: [A-Z], [a-z], [0-9], '-', '_', '.', '~'. 2. Reserved/Unsafe Characters: If not unreserved, convert character to its UTF-8 octet sequence. 3. Hexadecimal Formatting: Format each byte as a triplet starting with '%' followed by two uppercase hexadecimal digits: Byte -> %HH (e.g. Space [0x20] -> %20, Ampersand [0x26] -> %26, Slash [0x2F] -> %2F).

About URL Encoder / Decoder

The Free Online URL Encoder and Decoder converts URLs, query strings, and form parameters into RFC 3986 compliant percent-encoded strings, or decodes encoded URI components back into human-readable text.

Web servers require URLs to contain only specific ASCII characters. Reserved characters like spaces, ampersands, slashes, and non-ASCII Unicode characters must be percent-encoded to prevent URL syntax confusion and transmission errors.

Key Features & Capabilities:
• Two-Way Encoding & Decoding: Seamlessly toggle between encoding raw strings and decoding percent-encoded URLs.
• Full RFC 3986 Compliance: Accurately converts spaces to '%20' (or '+' in query parameters) and protects reserved delimiters.
• UTF-8 Multi-Byte Character Support: Full compatibility with international alphabets, emojis, and non-Latin character sets.
• Instant Real-Time Processing: Process complex query strings, redirect URLs, and webhook payloads with zero latency.
• Completely Private & Secure: Processing happens in your local browser sandbox without storing or transmitting URL contents.

Common Applications:
1. Web Development & API Integration: Safely pass query parameters in HTTP GET requests and RESTful APIs.
2. OAuth & Redirect URI Configuration: Encode callback endpoints and state tokens for authentication providers.
3. Web Scraping & Deep Linking: Decode messy, encoded web tracking URLs to extract clean landing addresses.

Frequently Asked Questions (FAQs)

4 Questions

Everything you need to know about URL Encoder / Decoder and how it works.

Is URL Encoder / Decoder completely free to use?

Yes, URL Encoder / Decoder is 100% free with unlimited calculations. There are no registration requirements, no paywalls, and no hidden subscriptions.

Is my data private and secure while using URL Encoder / Decoder?

Yes, your privacy is fully protected. All calculations run strictly client-side within your web browser. None of your input data is stored or logged on our web servers.

Can I use URL Encoder / Decoder on my mobile smartphone or tablet?

Yes, this tool is fully responsive and optimized for mobile devices, tablets, and desktop computers. You can also install it as a Progressive Web App (PWA) directly to your home screen.

How accurate are the results provided by URL Encoder / Decoder?

All calculations and transformations follow standard mathematical algorithms and authoritative standards to provide real-time, high-precision results.