# URL Parameter Builder Build and construct URLs with parameters by adding query strings, hash fragments, and path segments > Canonical page: https://elysiatools.com/en/tools/url-parameter-builder - **Category:** Development - **Keywords:** url, parameters, query, build, construct, assemble, web, http, https, url parameter builder ## Overview The URL Parameter Builder is a professional utility designed to help developers and marketers accurately construct complex URLs by assembling base paths, query strings, and hash fragments into a single, valid web address. ## Inputs - **Base URL** (text): Enter base URL (e.g., https://example.com/api) - **Query Parameters** (textarea): Enter query parameters (one per line: key=value or key:value) - **Path Segments** (textarea): Enter path segments (one per line) - **Hash Fragment** (text): Enter hash fragment (without #) - **URL Encoding** (select) - **Preserve Parameter Order** (checkbox) - **Include Build Metadata** (checkbox) - **Output Format** (select) ## When to use - When you need to generate tracking links with multiple UTM parameters for marketing campaigns. - When building dynamic API request URLs that require specific path segments and query filters. - When you need to ensure special characters in your URL parameters are correctly encoded for web compatibility. ## How it works - Enter your base URL and define any additional path segments to structure the core address. - Input your query parameters as key-value pairs to append data to the URL string. - Add an optional hash fragment and select your preferred encoding method to finalize the structure. - Generate the complete URL and choose your desired output format, such as raw text or a detailed JSON breakdown. ## Use cases - Generating standardized tracking URLs for email and social media marketing campaigns. - Constructing dynamic API endpoints for frontend applications with variable filters. - Debugging and verifying URL structures by breaking them down into their individual components. ## Frequently asked questions ### Does this tool support URL encoding? Yes, you can choose between full encoding, partial encoding, or no encoding to ensure your parameters are formatted correctly for web browsers. ### Can I maintain the order of my query parameters? Yes, by enabling the 'Preserve Parameter Order' option, the tool will keep your query parameters in the exact sequence you provided. ### What output formats are available? You can output the result as a plain URL string, a JSON object, a component breakdown, or a detailed analysis report. ### Do I need to include the '#' symbol for hash fragments? No, simply enter the fragment text, and the tool will automatically prepend the '#' symbol for you. ### Is this tool suitable for API development? Absolutely, it is designed to help developers assemble complex API endpoints by managing path segments and query parameters systematically. ## Related tools - [URL Parameter Extractor](https://elysiatools.com/en/tools/url-parameter-extractor): Extract and parse parameters from URLs including query strings, hash fragments, and path segments - [Hash Algorithm Comparator](https://elysiatools.com/en/tools/hash-algorithm-comparator): Hash the same input with MD5, SHA-1, SHA-256, SHA-512, BLAKE2b, and BLAKE3 at the same time and compare them side by side: output length, hex/Base64 digest, security status (broken / modern), and a relative speed benchmark. Great for teaching, choosing a hashing algorithm, or sanity-checking checksums. - [SBOM SPDX CycloneDX License Policy Auditor](https://elysiatools.com/en/tools/sbom-spdx-cyclonedx-license-policy-auditor): Audit SPDX 2.3 or CycloneDX 1.5 component licenses and emit SARIF with failing dependency paths - [OAuth 2.0 / OIDC Authorization Code with PKCE Flow Visualizer](https://elysiatools.com/en/tools/oauth-oidc-authorization-code-pkce-flow-visualizer): Simulate the Authorization Code flow with PKCE end to end: verifier/challenge generation, authorization URL, token exchange, ID Token validation checklist and an interception-attack demo. - [Password Strength Meter](https://elysiatools.com/en/tools/password-strength-meter): Estimate real password strength with Shannon entropy, zxcvbn pattern matching (l33t, dictionary, sequences, repeats) and brute-force crack-time across attack scenarios (offline fast/slow hash, online). The password is evaluated locally and never sent anywhere. - [RSA Encrypt / Decrypt](https://elysiatools.com/en/tools/rsa-encrypt-decrypt): Encrypt text with an RSA public key or decrypt ciphertext with the matching private key, using OAEP padding (SHA-1 or SHA-256). Handles long messages by chunking. Keys and data stay local. PKCS#1 v1.5 is intentionally not offered (Node disables it for decryption due to Bleichenbacher attacks). - [Data Append Merger](https://elysiatools.com/en/tools/data-append-merger): Vertically append and merge multiple data tables with intelligent column matching - [Multi-Table Joiner](https://elysiatools.com/en/tools/multi-table-joiner): Merge and join multiple tables with various join types (inner, left, right, full) ## Samples - [URL Query Analyzer Samples](https://elysiatools.com/en/samples/url-with-query-samples): Comprehensive collection of URLs with query parameters for testing URL parsing, encoding validation, and parameter extraction - [URL Slug Samples](https://elysiatools.com/en/samples/slug): Collection of valid and invalid URL slug examples for testing (lowercase letters, numbers, hyphens, optional underscores) - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion ## Related content - [Email MIME Delivery Prep and Handoff](https://elysiatools.com/en/hubs/email-mime-delivery-workflows): Validate recipients, inspect domain and DNS signals, encode MIME-safe content, add tracking parameters, and package a pre-send handoff artifact. - [Technical SEO URL Workflows](https://elysiatools.com/en/hubs/technical-seo-url-workflows): Validate SEO-safe slugs, inspect query parameters, prepare robots and sitemap files, generate social metadata, and verify page signals before launch.