URL Encoder & Decoder

Escape and unescape URL query strings safely in your browser. Free developer utility.

Input

Upload File

Output

Frequently Asked Questions

What is URL encoding?

URL encoding (percent-encoding) converts special characters like spaces, ampersands, and question marks into %XX format for safe inclusion in URLs. For example, spaces become %20, & becomes %26. This ensures URLs work correctly across all browsers and servers.

Who uses this tool professionally?

Frontend developers encode query parameters for API requests. QA engineers decode encoded URLs in error logs for debugging. SEO specialists decode URL-encoded slugs to verify proper page targeting and crawlability.

Does it handle international characters?

Yes. The tool properly encodes and decodes UTF-8 characters including Chinese, Arabic, Hindi, and emoji. International characters are encoded using standard percent-encoding of their UTF-8 byte representation.

Is my data kept private?

Yes. All encoding/decoding happens locally in your browser. URL strings are never sent to any server.

URL Encoder & Decoder

Escape and unescape URL query strings safely in your browser. Free developer utility.

Key Capabilities

What is URL encoding?

Who uses this tool professionally?

Does it handle international characters?

Is my data kept private?

Yes. All encoding/decoding happens locally in your browser. URL strings are never sent to any server.

How to Use

Paste or upload your data

Open the URL Encoder / Decoder tool and paste your data into the input field, or upload a file containing the data to convert.

Configure conversion options

Select your desired output format and configure any formatting options. The output previews in real-time.

Copy or download output

Copy the converted output to clipboard or download as a file. All processing happens locally in your browser.

Frequently Asked Questions

What is URL encoding?

Who uses this tool professionally?

Does it handle international characters?

Is my data kept private?

Yes. All encoding/decoding happens locally in your browser. URL strings are never sent to any server.

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Developer Utilities — Data Format Conversion and Encoding

Understanding Data Serialization Formats

Software developers frequently work with structured data formats like JSON (JavaScript Object Notation), CSV (Comma-Separated Values), XML (Extensible Markup Language), and YAML (YAML Ain't Markup Language). Each format has different strengths: JSON is the standard for web APIs and configuration files. CSV is universally supported by spreadsheet applications. XML is used in enterprise systems and document formats. YAML is popular for human-readable configuration. Our conversion tools transform data between these formats instantly, handling edge cases like nested objects, special characters, and encoding differences.

Cryptographic Hash Functions

Hash functions like MD5, SHA-1, SHA-256, and SHA-512 convert any input data into a fixed-length string of characters called a hash or digest. These functions are one-way — you cannot reverse-engineer the original input from the hash. They are used for password storage, data integrity verification, digital signatures, and file deduplication. SHA-256 is the current standard for security-sensitive applications. MD5 and SHA-1 are considered cryptographically broken for security purposes but are still useful for checksums and non-security applications. All our hash generators run entirely in your browser — your data is never transmitted.

Text Encoding and Character Sets

Computers store text as numbers. ASCII maps 128 characters (English letters, digits, basic punctuation) to numbers 0-127. Unicode extends this to over 140,000 characters covering virtually every writing system on Earth. UTF-8 is the dominant encoding on the web, using 1-4 bytes per character. Base64 encoding converts binary data (like images or files) into a text-safe format using 64 printable ASCII characters. URL encoding replaces special characters with percent-encoded equivalents for safe transmission in web addresses. Our encoding tools handle all these transformations with proper error handling for malformed input.

Privacy for Developer Tools

All DoctorDocs developer tools process your data entirely in your browser using JavaScript. No API calls, no server uploads, no telemetry. This is critically important for developers working with sensitive data — API keys, database connection strings, configuration secrets, or proprietary code. When you paste a JSON payload to format it, or generate a SHA-256 hash of a password, the data exists only in your browser's memory. Close the tab and it is gone. This makes DoctorDocs developer tools safe to use with production data and secrets.