Convert plain text, query strings, special characters, and non-ASCII symbols into RFC 3986-compliant percent-encoded URLs with sub-millisecond precision. The Universal URL Encoder on RiazHub provides dual-mode processing for full web addresses (encodeURI) and individual query parameters (encodeURIComponent), plus strict RFC 3986 escaping for reserved punctuation (!, ', (, ), *). Effortlessly switch between standard %20 hex percent-encoding and HTML form application/x-www-form-urlencoded plus sign (+) replacement. Features real-time KPI metrics, synchronized line-number gutters, drag-and-drop batch file processing, a live character-by-character UTF-8 escape matrix, and an interactive query parameter studio—executed 100% locally in your web browser for complete privacy and zero data leakage.

RFC 3986 Standard & UTF-8 Escaper

Universal URL Encoder

Convert plain text, special characters, and non-ASCII symbols into RFC 3986-compliant percent-encoded strings with live character inspection in real time.

Escaped Tokens

0 Tokens

0% of total characters

Length Expansion

0 ➔ 0 Chars

Expansion Ratio: 1.00x

Space Strategy

Standard %20

RFC 3986 Hex Percent

UTF-8 Byte Weight

0 Bytes

0 Lines Detected

Presets:

Source Input

Drag & drop file (.txt, .log, .csv, .json, .md) or browse

Encoding Mode

Strict Component encodeURIComponent + RFC 3986

Full URI Mode Keeps ://, /, ?, &, # intact

Form Data Spaces converted to plus (+)

Aggressive Percent-encode every character

Space Handling Strategy

Standard %20 Plus Sign (+) Literal %2B

Hex Percent Casing

UPPERCASE (%2F) lowercase (%2f)

Strict RFC 3986 Characters Escape !, ', (, ), * as %21, %27, %28, %29, %2A

Bulk Line-by-Line Mode Encodes each newline independently

Auto-Trim Lines Strips leading and trailing spaces per line

Glyph	Unicode	Decimal	Status	Percent Encoded
Enter text on the left to inspect character-level percent-encoding

No query parameters detected in the current input. Paste a URL or key=value query string to inspect.

What is RFC 3986 Percent-Encoding and Why is it Necessary? ▼

Uniform Resource Identifiers (URIs) are restricted by internet standards to a small subset of the 7-bit US-ASCII character set. Any character outside this permitted range—including spaces, symbols, punctuation, and non-Latin international alphabets (such as Arabic, Urdu, Cyrillic, Chinese, and emojis)—must be converted into UTF-8 byte sequences, with each byte represented by a percent sign followed by two hexadecimal digits (%XX). This guarantees that web servers, caching proxies, and browsers interpret requests predictably without syntax breakage.

Reserved vs. Unreserved Characters Explained ▼

Under RFC 3986 Section 2:

Unreserved Characters: Letters (A-Z, a-z), digits (0-9), hyphen (-), underscore (_), period (.), and tilde (~). These should never be percent-encoded unless aggressive mode is specifically required.
Reserved Characters: Characters that have syntactic meaning in a URL (: / ? # [ ] @ ! $ & ' ( ) * + , ; =). When these characters appear as literal values rather than structural delimiters, they MUST be percent-encoded.

encodeURIComponent() vs. encodeURI() — Which Should You Use? ▼

encodeURI(): Intended for complete web addresses (e.g. https://riazhub.com/path?key=value). It preserves core protocol schemes, path slashes, and parameter delimiters so the address remains functional.

encodeURIComponent(): Intended for individual parameter values or query fragments. It encodes slashes, colons, question marks, and ampersands so they don't accidentally split the URL structure. Furthermore, this tool's Strict Component mode applies the extra RFC 3986 rules to safely escape ! ' ( ) *.

Why Do HTML Forms Use Plus (+) Instead of %20 for Spaces? ▼

The HTML standard for MIME type application/x-www-form-urlencoded historically dictates that spaces in form submission values are replaced with a plus sign (+) rather than the standard RFC 3986 hex sequence (%20). Use our "HTML Form Submit" mode whenever you are preparing parameters for legacy backend processors, curl POST payloads, or search query strings.

Client-Side Privacy Guarantee ▼

All encoding, byte math, file parsing, and string transformations are executed 100% locally within your web browser using native JavaScript. No text, tokens, API keys, passwords, or URLs are ever transmitted to RiazHub.com or any external server.

Action completed