Free SEO, Hosting & Network Tools

11 tools

Network

DNS, IP and network diagnostic tools.

20 tools

Hosting

Domain and server administration tools.

18 tools

SEO

Search engine optimization tools.

26 tools

Developer

Developer productivity tools.

Network

DNS, IP and network diagnostic tools.

DNS Lookup

Look up A, AAAA, MX, TXT, NS, CNAME and SOA records for any domain — free.

SSL Certificate Checker

Inspect any domain's SSL certificate — issuer, validity, SANs, chain and TLS version.

HTTP Headers Analyzer

Inspect HTTP response headers, security headers and redirect chain for any URL.

IP Lookup & Geolocation

Country, city, ISP, ASN and geographic location for any IP address. IPv4 and IPv6.

Subnet / CIDR Calculator

Calculate network address, broadcast, netmask and usable host range from an IP and CIDR prefix.

VPN Protocol Comparison

Pick your priorities and see which VPN protocol fits. Compare WireGuard, OpenVPN, IKEv2/IPsec and L2TP.

MTU / MSS Calculator

Calculate a recommended MTU and MSS clamp value accounting for VPN tunnel overhead.

IP Private/Public Checker

Find out whether an IPv4 address is an RFC 1918 private range, loopback, link-local, CGNAT, or public.

WireGuard Config Generator

Assemble a ready wg0.conf file from your own WireGuard keys and network parameters.

Port Number Reference

Search commonly used port numbers for SSH, HTTP, MySQL, PostgreSQL, WireGuard and more.

DNS Propagation Calculator

Convert a TTL value into human-readable duration and estimate when a DNS change propagates.

Hosting

Domain and server administration tools.

WHOIS Lookup

Look up registrar, registration date, expiry, nameservers and DNS info for any domain.

Website Uptime Checker

Check if a website is up, its HTTP status code and response time — instantly.

Cron Expression Parser

Translate a cron expression into plain language and preview its next run times — for scheduled server jobs.

Email Header Analyzer

Paste raw email headers to see the Received hop chain, per-hop delays and SPF/DKIM/DMARC authentication results.

chmod / File Permission Calculator

Convert Linux file permissions from rwx checkboxes to octal and back — including setuid, setgid and sticky bit.

.htaccess Generator

Build Apache rules for HTTPS enforcement, www redirects, gzip and disabling directory listing with one click.

Nginx Server Block Generator

Generate an SSL-ready Nginx server block configuration for a static site or reverse proxy.

systemd Service Generator

Generate a .service unit file to run an application in the background with systemd.

SSH Config Generator

Build ~/.ssh/config connection shortcuts with Host alias, port and ProxyJump support.

Docker Compose Generator

Generate a single-service docker-compose.yml from image, ports, volumes and environment variables.

umask Calculator

Calculate the default permissions a umask value leaves on newly created files and directories.

Cron Expression Builder

Pick your schedule and get a valid cron expression automatically — no raw cron syntax needed.

.htpasswd Generator

Generate a username:hash line for Apache/Nginx Basic Authentication. Hash computed in your browser.

WordPress Salt Generator

Generate 8 unique security keys (salts) for wp-config.php. Same character set as the official WordPress.org API.

WordPress .htaccess Generator

Rebuild the standard WordPress permalink rules, including Multisite subdirectory/subdomain variants.

WordPress Table Prefix SQL Generator

Generate the RENAME TABLE and required follow-up UPDATE SQL statements to change the wp_ table prefix.

WordPress File Permissions Reference

WordPress Codex's officially recommended file/directory permissions with copy-ready chmod commands.

wp-config.php Constants Generator

Generate common wp-config.php constants like WP_DEBUG, DISALLOW_FILE_EDIT, WP_MEMORY_LIMIT by checkbox.

WordPress Password Reset SQL Generator

Generate the UPDATE SQL statement to reset a WordPress password directly from the database.

UFW Rule Generator

Build correct ufw commands rule by rule for Ubuntu's UFW firewall.

SEO

Search engine optimization tools.

Meta Tag Analyzer

Analyze a page's title, description, Open Graph, Twitter Card, canonical and robots meta tags.

robots.txt Tester

Test whether a URL is crawlable for a given User-Agent based on robots.txt rules.

AdSense Revenue Calculator

Estimate your website's AdSense ad revenue by region and category. Powered by Google's official calculator data — runs in your browser.

SEO Slug Generator

Turn titles into SEO-friendly, URL-safe slugs. With Turkish character transliteration (ı, ğ, ü, ş, ö, ç). Runs in your browser.

Google SERP Snippet Preview

Preview how your title and meta description render in Google search results, including pixel-width truncation.

UTM Campaign URL Builder

Build trackable campaign URLs with source, medium, campaign, term and content parameters for Google Analytics.

Ad Metrics Calculator (CPM/CPC/CTR)

Calculate CPM, CPC, CTR and RPM from your impressions, clicks and spend data — for Google Ads, Meta Ads and more.

robots.txt Generator

Build a valid robots.txt file from scratch or with a WordPress preset.

XML Sitemap Generator

Convert your list of URLs into a valid sitemap.xml file, with priority, changefreq and lastmod support.

Open Graph & Twitter Card Tag Generator

Live-preview how your share card will look on Facebook, LinkedIn, X and WhatsApp.

Schema.org JSON-LD Generator

Generate valid JSON-LD structured data for Article, Product, FAQPage and LocalBusiness.

Keyword Density Analyzer

Paste your text: word count, reading time, top repeated words and a readability score.

Ad Character Counter

Live character counters against the official limits of Google Ads, Meta Ads, X and LinkedIn.

Meta Robots Tag Generator

Build a meta tag and X-Robots-Tag header from index/noindex, follow/nofollow and other robots directives.

Favicon Generator

Upload an image and download PNGs in every common favicon size from 16 to 512 pixels.

Email Subject Line Preview

Preview how your subject line truncates on Gmail desktop, Gmail mobile and Outlook.

Social Media Image Size Reference

Commonly recommended image dimensions for Instagram, Facebook, X, LinkedIn, YouTube and Pinterest.

Ad Budget Planner

Calculate daily budget from total budget and campaign length, and estimated reach from your own CPC/CPM.

Developer

Developer productivity tools.

JSON Formatter & Validator

Format, validate, and minify JSON. Runs fully in the browser — your data never leaves the page.

Base64 Encode & Decode

Encode or decode text and files to/from Base64. Runs entirely on the client side.

JWT Decoder

Decode JSON Web Token (JWT) header and payload. 100% client-side — your token stays local.

QR Code Generator

Generate QR codes for text, URLs, email or wifi. Download as SVG or PNG — free.

UUID Generator

Generate random UUID (v4) and NIL UUIDs with one click. Bulk generation, hyphen/uppercase options. Runs fully in your browser.

Strong Password Generator

Generate secure, random passwords. Control length, upper/lowercase, digits and symbols. Cryptographic randomness — in your browser.

Hash Generator (SHA)

Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes for any text. 100% client-side via the Web Crypto API.

Color Converter (HEX/RGB/HSL)

Convert instantly between HEX, RGB and HSL color formats. Live preview and copy. Browser-based.

Unix Timestamp Converter

Convert Unix epoch timestamps to human-readable dates and back. Seconds/milliseconds, UTC and local time.

.gitignore Generator

Combine standard .gitignore templates for Node, Python, Java, Go, PHP and OS/editor files.

Dockerfile Generator

Generate a minimal, layer-cache-friendly Dockerfile for Node.js, Python or a static site.

.env File Formatter

Normalize your .env file; detect duplicate keys and invalid variable names.

WordPress Plugin Header Generator

Generate the standard docblock header required at the top of a WordPress plugin's main PHP file.

WordPress Theme style.css Header Generator

Generate the standard comment header required at the top of a WordPress theme's style.css.

Password Strength Time Estimate

Estimate how resistant a password is to random-guessing under a few different defense scenarios.

Email Syntax Validator

Check an email address's syntax and catch common typos (like gmial.com).

Regex Tester

Test your JavaScript regular expression against sample text and see matches highlighted live.

URL Encoder / Decoder

Encode/decode text or URLs for safe use in query strings and form data.

HTML Entity Encoder / Decoder

Convert special characters to/from HTML entities (&, < etc.).

Number Base Converter

Convert a number between binary, octal, decimal and hexadecimal live.

Text Diff Checker

Compare two texts line by line and see added/removed lines highlighted.

Lorem Ipsum Generator

Generate classic Lorem Ipsum filler text for mockups and layout testing — paragraphs, sentences or words.

CSV ⇄ JSON Converter

Convert CSV to a JSON array and back. RFC 4180 compliant, including quoted fields.

Markdown Previewer

Write Markdown and see an instant HTML preview. Headings, lists, code blocks and links supported.

Text Statistics

Word, character, sentence and paragraph counts; reading and speaking time estimates.

IBAN Validator

Check whether an IBAN's check digits are mathematically valid.

Why KEYDAL Tools?

Built for developers and sysadmins

The KEYDAL free tools collection is designed to solve common tasks in web hosting, server administration, SEO and software development with a single click. Every tool is browser-based, requires no installation, sign-up or payment. Works smoothly from anywhere, on mobile or desktop. For tools that handle sensitive data (JWT decoder, JSON formatter, Base64), processing happens entirely in your browser — nothing is sent to our servers.

The Network category includes DNS lookup (A, AAAA, MX, TXT, NS, CNAME, SOA), SSL certificate checker (issuer, validity, SANs, chain, TLS version), HTTP headers analyzer (security headers, redirect chain), IP geolocation (country, city, ISP, ASN), subnet/CIDR calculator.

Hosting category covers WHOIS lookup (.com, .net, .org, .io, .tr, .com.tr, .dev and more), uptime checker (uptime, HTTP status, response time), cron expression parser (for scheduled jobs) and email header analyzer (Received chain, SPF/DKIM/DMARC).

For SEO and marketing teams there is meta tag analyzer (title, description, Open Graph, Twitter Card, canonical, robots), robots.txt tester, Google SERP preview (pixel-width truncation), UTM campaign builder, ad metrics calculator (CTR, CPC, CPM, RPM); for developers JSON formatter/validator, JWT decoder, Base64 encode/decode, QR code generator are available.

If you are choosing server infrastructure, see also our hosting, VPS, VDS, cloud hosting, dedicated server and storage price comparison pages with current pricing, package details and performance benchmarks for Hetzner, OVHcloud, Contabo, DigitalOcean and Turkish providers.

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