Online Tools
Free online tools for web development, SEO, website checks, images, and technical diagnostics.
These utilities support BAZTER PRO commercial hubs — explore business website development, e-commerce development and website case studies.
SSL Certificate Tools
Check SSL certificate validity, expiration, and generate new certificates (RSA, DSA, ECDSA)
Resize Image
Resize images to any dimensions and convert to JPG, PNG, or WebP format
AVIF, WebP & PDF Converter
Convert JPG/PNG/WebP to AVIF, JPG/PNG/AVIF to WebP, and WebP or PDF back to JPG or PNG
Compress Image
Free lossless image compression for JPG, PNG, and WebP formats
Domain Expiry Checker
Check domain expiration, registrar, and days remaining via RDAP lookup
What Is My IP
Check your IP address with geolocation data and network information
Port Checker
Free TCP port checker and scanner tool to test port connectivity
Domain Blacklist Checker
Check if your domain is blacklisted on RBL and URIBL providers
AbuseIP Checker
Check IP address in AbuseIP database for spam and malicious activity reports
Favicon Checker
Check and audit favicon files (SVG, PNG, ICO) for your website
cURL Online
Send HTTP requests online and test APIs with all methods, custom headers, and request bodies
Website Screenshot
Capture screenshots of any website instantly. Download or share with a link
Social Preview Checker
Preview how a page looks in Facebook, X, LinkedIn, and messengers from Open Graph and Twitter tags
QR Code Generator
Generate QR codes for links, text, emails, phone numbers, and download as PNG
Instagram Review Checker
Check Instagram profile reviews by username or profile link via saythe.name
Website Speed Checker
Check page speed, loading metrics, and practical performance hints
Website Audit
Business-focused site audit with SEO, trust, social preview, mobile, and ad-readiness scores
Robots.txt Checker
Analyze robots.txt crawl rules, sitemaps, and path allow/block status online
Sitemap Checker
Discover and validate XML sitemaps, count URLs, and inspect child sitemaps
Broken Link Checker
Scan pages for broken anchor links and images with HTTP status validation
SEO Page Checker
Analyze title, meta, H1, canonical, robots, Open Graph, schema.org, links, and indexability
Contact Link Generator
Generate tel, mailto, WhatsApp, Telegram, and Viber links with Font Awesome HTML buttons
Business Name / Domain Checker
Generate slug, username, and expanded domain ideas with Namecheap availability checks
Ukrainian Address Transliterator
Convert Ukrainian street names, addresses, cities, and personal names into Latin format
Need a business website, store, or published case studies?
BAZTER PRO builds commercial websites and e-commerce with SEO-ready structure, lead forms, payments, delivery, and post-launch support.
- Business website developmentCorporate sites, service pages, catalogs, and web systems: performance, technical SEO, lead forms, and analytics.
- E-commerce developmentCatalog, product pages, cart, payments, delivery, admin workflows, and SEO structure for online sales growth.
- Website case studiesPublished projects: business sites, stores, integrations, and technical solutions with SEO and conversion examples.
Featured project pages
Scope, SEO context, and usage scenarios are described on the project pages for SSL Certificate Tools and AVIF, WebP & PDF Converter.
Free Online Tools for Web Development, SEO, and Website Checks
This page collects free online tools for web development, SEO, website checks, image preparation, and technical diagnostics. They help verify a site before launch, after changes, or before handing a task to a developer.
For SEO and website quality, you can check favicons, robots.txt, sitemaps, social previews, speed, page SEO basics, and broken links.
For images, the tools cover resizing, AVIF/WebP conversion, and compression for service pages, catalogs, content, and e-commerce sites.
For technical diagnostics, use SSL checks, online cURL, public IP lookup, TCP port checks, domain blacklists, and AbuseIPDB reputation checks.
The tools support BAZTER PRO's main work: website development, e-commerce, SEO structure, technical support, and integrations.
Frequently Asked Questions
Are these online tools free to use?▼
Yes, all tools on this page are completely free. No registration, no sign-up required. They work directly in your browser with no software installation needed.
Can I use these tools before launching a website?▼
Yes. Before launch, check SSL, favicon, robots.txt, sitemap, social preview, speed, SEO basics, and broken links.
Can I convert images to AVIF, WebP, or PDF online?▼
Yes, the AVIF, WebP & PDF Converter supports JPG/PNG/WebP to AVIF, JPG/PNG/AVIF to WebP, and WebP/PDF back to JPG or PNG with adjustable quality settings.
How can I check if my IP or domain is blacklisted?▼
Use our Domain Blacklist Checker to verify if your domain is listed on any RBL or URIBL providers. For IP reputation checks, use the AbuseIP Checker tool to query the AbuseIPDB database.
Is my data safe when using these tools?▼
Shared results are stored for 1 week so report links can work, then they are deleted automatically. Private keys and secrets are not stored: certificate operations run server-side with OpenSSL and no private keys are retained.