Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
sitemap.xml Generator
Generate XML sitemaps for better search engine indexing. Add URLs individually or in bulk.
- Home
- Web Dev
- sitemap.xml Generator
Bulk Import URLs
URLs
Clear All
Maximum 500 URLs reached. Remove some URLs to add more.
0 chars | 0 lines
What is an XML Sitemap?
An XML sitemap is a file that lists all important pages on your website, helping search engines like Google discover and index your content more efficiently. It follows the Sitemaps Protocol standard.
This tool features:
- Individual URL management — Add, edit, or remove URLs with custom properties.
- Bulk import — Paste a list of URLs to add them all at once.
- Custom properties — Set lastmod, changefreq, and priority per URL or use defaults.
- Valid XML output — Generates standard sitemap.xml conforming to sitemaps.org schema.
Sitemap Properties Reference
| Property | Purpose | Example |
|---|---|---|
loc |
Full URL of the page (required) | https://site.com/page |
lastmod |
Date of last modification (YYYY-MM-DD) | 2024-12-01 |
changefreq |
How often the page changes | weekly |
priority |
Importance (0.0 to 1.0, default 0.5) | 0.8 |
How to Use
- Set defaults — Choose default change frequency and priority for all URLs.
- Add URLs — Click Add URL to add individual URLs, or use Bulk Import to paste multiple URLs at once.
- Customize properties — Set lastmod date, change frequency, and priority per URL as needed.
- Copy or download — Use the copy button or click Download sitemap.xml to save the file.
Frequently Asked Questions
Where should I place my sitemap?
Upload your sitemap.xml to the root directory of your website and submit it to Google Search Console. You can also reference it in your robots.txt file.
How many URLs can a sitemap contain?
A single sitemap can contain up to 50,000 URLs and be up to 50MB (uncompressed). If you have more URLs, you need to create multiple sitemap files and a sitemap index file.
Is this tool safe to use?
Yes. All processing happens entirely in your browser. No data is sent to any server.
Last updated: 17 Aug 2026
Related Tools
Try These Tools Too
Blog
Latest from Our Blog
How to Choose a Hash Algorithm for Data Security
A practical decision guide to choosing the right hash algorithm: MD5, SHA-1, SHA-2, SHA-3, bcrypt, argon2, PBKDF2, and SRI, with comparisons and clear recommendations.
Aug 08, 2026
CSS vs Tailwind CSS: Which One Should You Use?
A thorough, practical comparison of hand-written CSS and Tailwind CSS: learning curve, maintainability, performance, team workflows, and when each approach wins.
Aug 08, 2026
How to Optimize Core Web Vitals for Your Website
Learn practical, step-by-step techniques to improve LCP, INP, and CLS on your website. A developer-focused guide with real measurements and fixes.
Aug 08, 2026
How to Use Base64 Encoding in Real Projects
Learn practical, production-ready ways to use Base64 encoding: data URLs for images, JWT payloads, API tokens, and email attachments, with real code examples.
Aug 08, 2026
AES Encryption Explained: How It Works and Why It Matters
Learn how AES encryption works, the differences between AES-128, AES-192, and AES-256, and how to encrypt and decrypt data online.
Jun 23, 2026