The Professional
URL Gateway
A surgical-grade interface for encoding, decoding, and normalizing Uniform Resource Identifiers. Built for developers who demand precision and 100% client-side data isolation.
Source Input
Enter a raw URL, query parameter, or text string.
Transformation Result
The processed output string.
Technical Capabilities
Real-Time Transformation
Instantaneously applies standard encoding algorithms (encodeURI, encodeURIComponent) as you type, with zero network latency.
Heuristic Decoding
Intelligently detects and reverses percent-encoded sequences, restoring readability to obfuscated query strings and deep links.
Protocol Normalization
Sanitizes malformed URLs by standardizing protocol prefixes, resolving adjacent slashes, and enforcing canonical formatting.
Syntax Validation
Pre-flight checks for your URLs. Identifies structural issues and invalid characters before they break your backend logic.
Multi-Standard Support
Toggle between strict URI Component encoding, Full URL preservation, or `application/x-www-form-urlencoded` (space = +) modes.
Portable Exports
Generate clean documentation assets. Copy sanitized strings to clipboard or export results as text files for audit logs.
Offline Availability
Engineered for reliability. This PWA-ready tool functions completely offline once loaded, ensuring access in air-gapped environments.
Client-Side Isolation
Zero-trust architecture. Your data never leaves the V8 sandbox of your browser. No server logging, no persistent storage.
Workflow: From Raw String to Safe URI
Input Isolation
Paste your target string into the Source Input. The tool accepts full URLs (`https://...`), isolated query parameters, or form data.
Select Standard
Choose **URI Component** for query values (strict), **Full URL** to preserve structure, or **Form** for legacy POST data compatibility.
Execute Transformation
Trigger **Encode** to sanitize unsafe characters (like spaces or `&`) or **Decode** to revert percent-encoded sequences to text.
Normalize (Optional)
Use **Normalize** to enforce standard URL structuring, automatically fixing protocol omissions and redundant delimiters.
Extract Result
Copy the transformed string directly to your clipboard for use in API calls, HTML attributes, or database entries.
Audit & Save
For complex debugging sessions, download the output as a `.txt` file to maintain a record of the transformation steps.
URL Encoding Examples
Query Parameter
Input: search=smart formatter & lang=en URI Component: search%3Dsmart%20formatter%20%26%20lang%3Den Form: search%3Dsmart+formatter+%26+lang%3Den
Full URL
Input: https://api.example.com/callback?redirect=/dashboard&state=abc123 Full URL: https://api.example.com/callback?redirect=/dashboard&state=abc123 URI Component: https%3A%2F%2Fapi.example.com%2Fcallback%3Fredirect%3D%2Fdashboard%26state%3Dabc123
Percent Decoding
Encoded: file%2Fupload%3Fname%3Dreport%252Epdf Decoded once: file/upload?name=report%25.pdf Decoded twice: file/upload?name=report.pdf
Deep Dive: RFC 3986 & Percent-Encoding
The Physics of Percent-Encoding
URLs are limited to a subset of ASCII characters. Unsafe characters (like spaces, emojis, or separators in the wrong place) must be converted into a safe format: a `%` followed by two hexadecimal digits (e.g., Space → `%20`).
Original: search?q=C++ & Rust Encoded: search?q=C%2B%2B%20%26%20Rust
When to Encode?
Encoding is critical when injecting user-generated content into a URL. If you don't encode a user's name like "Ben & Jerry", the `&` will be interpreted as a delimiter, breaking the query string structure and potentially causing security vulnerabilities.
Strategy: URI vs. Component
- Full URL (encodeURI): Smashes unsafe chars but leaves reserved separators (`:`, `/`, `?`, `#`, `&`) intact. Use this when you have a complete URL that just needs cleanup.
- Component (encodeURIComponent): Encodes everything including separators. Mandatory for values within a query string (e.g., `?redirect_url=...`).
Common Pitfalls
- Double Encoding: Accidentally encoding `%20` again results in `%2520`, breaking the data.
- Form vs. Percent: HTML forms often use `+` for spaces (`application/x-www-form-urlencoded`), but APIs expect `%20`. Mismatching these causes data corruption.
Engineering Scenarios
Marketing & Tracking
When constructing UTM parameters (`utm_source`, `utm_campaign`), spaces and special characters must be strictly encoded to ensure analytics platforms parse them correctly.
REST API Payloads
Sending standard JSON or XML inside a GET request query parameter? You must encode the entire payload string to prevent JSON brackets `` from being misinterpreted by the server.
OAuth & Callbacks
Authentication flows (OAuth2, SAML) heavily rely on `redirect_uri` parameters. These URLs usually contain their own query strings, requiring strict encodeURIComponent handling to prevent parameter leakage.
Legacy Form Debugging
Inspect raw POST bodies from legacy systems. Our "Form" mode mimics the `application/x-www-form-urlencoded` standard (replacing spaces with `+`), essential for debugging older backend integrations.