Free AI, Security, Dev & Business Tools
100+ free tools to help you work smarter and grow your business.
Security
11HSTS Test
Test a URL for the Strict-Transport-Security header and inspect max-age, includeSubDomains, and preload directives.
Secure Cookie Test
Scan a URL for Set-Cookie headers and review cookie security flags including Secure, HttpOnly, and SameSite.
Mixed Content Checker
Scan a page for scripts, stylesheets, images, frames, forms, media, and CSS URLs that still load over HTTP.
JS Vulnerability Scanner
Scan a page for known vulnerable JavaScript libraries and review detected library versions.
Password Strength Checker
Estimate password strength, crack time, entropy, and common pattern risks directly in your browser.
Secure Headers Test
Test a URL for recommended HTTP security headers such as HSTS, CSP, X-Frame-Options, Referrer-Policy, and cross-origin policies.
CSP Test
Test a URL for Content-Security-Policy, parse its directives, and flag weak source patterns such as unsafe-inline, unsafe-eval, wildcards, data sources, and HTTP origins.
X-Frame-Options Test
Test a URL for the X-Frame-Options header and review CSP frame-ancestors coverage, deprecated values, and response headers.
MIME Sniffing Test
Test a URL for X-Content-Type-Options and verify that it uses the recommended nosniff value.
Cross Domain Policy Test
Test a URL for X-Permitted-Cross-Domain-Policies and review whether the policy is restrictive.
TLS Checker
Scan a domain for TLS 1.0, 1.1, 1.2, and 1.3 support, then review certificate common name, SANs, issuer, and expiry.
Network & DNS
11SPF Record Lookup
Check a domain for SPF records, parse mechanisms, and flag common policy issues such as multiple SPF records, permissive all mechanisms, deprecated ptr, and high DNS lookup count.
DNSSEC Test
Test a domain for DNSSEC status and inspect returned DNSKEY and RRSIG records.
DNS Record Lookup
Look up common DNS records for a domain and review addresses, mail servers, nameservers, TXT values, and authority settings in one report.
CAA Record Lookup
Look up DNS CAA records to see which certificate authorities are allowed to issue TLS certificates for a domain.
Free Website Hosting Checker
Find out who hosts the website. Our free hosting checker reveals the hosting provider, server IP address, and geographic location of any domain.
IP Location Lookup
Look up geolocation and ASN details for any IPv4 or IPv6 address using IPinfo Lite. Shows country, region, organization, network ID, and primary domain for the queried IP.
Ping Test
Run an ICMP-style ping test through Geekflare to see requests, packet loss, latency, and min / avg / max round-trip times for any host, domain, or IP.
Traceroute Test
Run an MTR traceroute through Geekflare and view each hop with packet loss, packets sent, and min / avg / max latency along the route.
IPv6 Test
Look up AAAA records only through Geekflare DNS to see if a domain is configured for IPv6 in DNS. Lists each IPv6 address returned for the zone.
URL Blacklist Checker
Look up a domain or URL against Google Web Risk for malware, social engineering, and unwanted software threats. Binary safe/unsafe result — not traditional DNS RBL lists.
Server Signature Test
Test a URL for version leakage in Server and X-Powered-By response headers.
SEO & Web Performance
15Referrer Policy Header Test
Test a URL for the Referrer-Policy header and review the full response header list returned by the scan.
HTTP Headers Checker
Fetch and display all HTTP response headers for any public URL. Useful for diagnosing server configuration, caching policies, and security header gaps.
Time to First Byte Checker
Check Time to First Byte (TTFB) for any public URL using Geekflare's Loadtime API and compare the server wait time against an 800 ms performance benchmark.
Website Audit
Run an in-depth website audit powered by Google Lighthouse. Get scores for Performance, SEO, Accessibility, and Best Practices.
Broken Link Checker
Scan a page with the Geekflare Broken Link API and separate links by HTTP status so you can fix dead URLs quickly.
Redirect Checker
Follow a URL's redirect chain with the Geekflare Redirect Checker API and inspect each hop, Location header, and final destination.
HTTP/2 Test
Use Geekflare's Loadtime API to verify HTTP/2 support and review protocol availability for the submitted URL.
HTTP/3 Test
Use Geekflare's Loadtime API to verify HTTP/3 support and inspect returned HTTP/3 protocol versions when available.
Domain Expiry Checker
Look up a domain's WHOIS registration dates and SSL certificate expiry in one report. See days remaining, registrar, and certificate issuer.
Hreflang Checker
Fetch a page and extract all hreflang link tags from the document head, including language codes, regional variants, and the x-default fallback.
Meta Description Generator
Enter a page topic, URL, or brief and get three AI meta title variants plus three meta description variants, each with character-count badges for SERP length best practices.
YouTube Tag Extractor
Paste a YouTube video URL to extract its keyword tags and review the video title, channel, and thumbnail metadata.
Meta Tag Analyzer
Analyze a page's metadata with Geekflare metascraping and review the fields used by search snippets and social previews.
Link Extractor
Extract and analyze internal, external, and mailto links from any webpage.
Website Down Checker
Check whether a website is reachable by performing a server-side HTTP probe and DNS lookup.
Business
5Paystub Generator
Generate professional paystubs in minutes with company branding, earnings, deductions, and PDF download.
Invoice Generator
Add your logo, company details, itemized billing, currency, due dates, PayPal email, and notes. Generate and download invoice as PDF in one click.
ROI Calculator
Calculate ROI percentage, total gain or loss, and compound annualized return from initial investment, final amount, and holding period.
Margin Calculator
Calculate profit margin, markup percentage, and total profit with quantity, tax, and currency formatting.
Payslip Generator
Generate professional PDF payslips with company branding, basic pay, earnings, deductions, and amount in words.
Utilities & Converters
20Online Screenshot
Take a full-page website screenshot online. Choose device and capture options, then preview, zoom, and download the generated image.
QR Code Generator
Generate a QR code in your browser, customize the foreground and background colors, add an optional logo, and download PNG or JPEG.
Password Generator
Create secure random passwords with configurable length, character sets, copy support, and an entropy-based strength estimate.
UUID Generator
Create one or many UUIDs with support for random, time-based, and namespace-based deterministic identifiers.
Random IP Generator
Create de-duplicated batches of random IPv4 addresses locally in your browser. Choose a legacy IP class, set a count up to 256, then copy the generated list.
Random String Generator
Create random strings locally in your browser with configurable length, count, and character types for test data, mock IDs, and examples.
JSON Schema Generator
Paste JSON, upload a JSON file, or load a public JSON URL, then generate a formatted JSON Schema without sending data to an API.
Hash Generator
Hash strings locally with MD5, SHA-1, SHA-256, SHA-512, SHA3, CRC16, CRC32, Adler32, RIPEMD-160, and Whirlpool. Copy lowercase hex digests—no server upload.
Sprint Name Generator
Create unique sprint name ideas for engineering and product work. Pick a category, set a count, add optional context, and copy names individually or in bulk.
Acronym Generator
Turn phrases into acronym candidates locally in your browser. Generate unique options, review source phrase mappings, and copy individual or all acronyms.
String Repeater
Duplicate text in your browser with optional separators between copies. Set repeat count, choose newline or space between repetitions, and add punctuation delimiters.
Small Text Generator
Create copyable Unicode text styles locally in your browser for social posts, usernames, notes, and lightweight formatting.
Free Character Counter
Analyze text in your browser and get counts for characters, words, non-empty line paragraphs, and literal spaces in one click.
UTF-8 Decoder & Encoder
Convert between plain text and UTF-8 byte sequences locally in your browser. Supports strict \xNN hex decoding and one-click copy for converted output.
Text to ASCII Converter
Convert plain text into numeric character codes directly in your browser. Results are generated as a space-separated list for quick copy and reuse.
Binary Translator
Translate values across number systems in your browser. Convert binary to decimal, text to hex, octal to binary, and more with one-click copy.
Roman Numeral Converter
Free converter to translate Roman numerals to numbers and numbers to Roman numerals online.
UTM Builder
Build tagged URLs for analytics campaigns with source, medium, campaign, term, and content parameters. Existing query strings are preserved.
UTM Validator
Check whether a campaign URL includes required UTM parameters, review optional tags, and spot missing tracking fields locally in your browser.
Free URL to PDF Converter
Convert a webpage URL to PDF online. Choose device, paper size, orientation, and scale, then download the generated file.
AI
5Welcome to the Team Message Generator
Create personalized welcome emails and short notes for new employees. Use AI to craft engaging messages from HR, CEOs, managers, or colleagues.
Positive Feedback Message Generator
Turn generic praise into impactful employee recognition. Generate tailored appreciation messages for performance, initiative, and creativity using AI.
Employee Recognition Letter Generator
Generate custom employee appreciation and recognition letters in seconds. Tailor letters for work anniversaries, leadership, retirement, project completion, and more.
Employee Award Titles Generator
Generate unique employee recognition award titles. Perfect for performance milestones, innovation, leadership, mentorship, and culture-fit appreciation.
Performance Review Generator
Generate customized annual, mid-year, and quarterly employee evaluations for developers, managers, and designers.