Nox Tools · free · no sign-up

Free Tools

The tools you reach for every day in SEO, GEO/AEO and web design. No sign-up, no trial limits; open methods, in English, Turkish and Arabic.

  • 104tools
  • 5categories
  • 3languages
  • $0cost
Pro Nox GEO CommandScan a whole site for SEO, GEO and AEO, then get the fixes ready to paste. Free 10-page trial. Try it

GEO & AEO Lab

Measure and improve how AI search finds and cites you.

GEO Score: AI Search Readiness Checker

Score how ready a page is to be found and cited by ChatGPT, Gemini, Perplexity and Google AI.

URL analysis
AI Crawler Access Checker

See whether GPTBot, ClaudeBot, PerplexityBot and 20+ AI bots can reach your page.

URL analysis
llms.txt Validator

Fetch your llms.txt and check structure, links and size against the llmstxt.org proposal.

URL analysis
llms.txt Generator

Read your sitemap and draft a clean llms.txt with grouped sections, ready to edit and publish.

URL analysis
Schema Markup Generator

Build valid JSON-LD for Organization, Local business, Article, FAQ, Product, Breadcrumbs, Person and Event.

Runs in your browser
GA4 AI Traffic Regex Generator

Generate the regex that isolates visits from ChatGPT, Perplexity, Gemini, Claude and other AI assistants in GA4.

Runs in your browser
AI Bots robots.txt Generator

Choose which AI training, search and user bots may access your site and copy the rules.

Runs in your browser
FAQ Schema Generator

Turn questions and answers into FAQPage JSON-LD or microdata, ready to paste.

Runs in your browser
AI Citability Scorer

Score each paragraph of your text for how easily an AI answer could quote it.

Runs in your browser
AI Visibility Prompt List Generator

Build a list of questions to test whether AI assistants mention and cite your brand.

Runs in your browser
JSON-LD Validator

Check structured data for JSON syntax errors, missing required properties and common mistakes.

Runs in your browser
llms.txt and llms-full.txt Builder

Assemble llms.txt and llms-full.txt from your pages' text in one step.

Runs in your browser
AI Search Site Scan

Scan up to 20 pages for AI-search readiness and see which pages assistants can and cannot use.

URL analysis
What AI Sees: Page to Markdown

See your page the way an AI crawler reads it: clean Markdown, token count and a JavaScript-dependence check.

URL analysis
Brand Entity Checker

Check whether AI systems and knowledge graphs can recognise your brand: Wikidata, Wikipedia and your sameAs links.

URL analysis
Answer Engine Readiness Checker

See which sections of your page are ready to be quoted as answers by featured snippets and AI assistants.

URL analysis
Agent Readiness Checker

Check whether AI agents can discover, read and use your site: llms.txt, Markdown, Content-Signal, MCP and more.

URL analysis
AI Visibility Tester

Ask ChatGPT-style assistants the questions your customers ask and measure how often your brand is mentioned and cited.

Runs in your browser

SEO Tools

Audit a page, find technical issues and prioritise fixes.

On-Page SEO Checker

Score one page for technical SEO, meta tags, structure, content, links, images and schema.

URL analysis
Word and Character Counter

Count words, characters, sentences and reading time, with SEO and social limits.

Runs in your browser
Keyword Density Checker

Find the most frequent words and phrases in a text and check a target keyword's density.

Runs in your browser
Readability Checker (Flesch)

Score text readability with Flesch and Flesch–Kincaid, or Ateşman for Turkish.

Runs in your browser
Meta Tag Generator

Generate title, description, canonical, Open Graph and Twitter Card tags with length checks.

Runs in your browser
SERP Snippet Preview

Preview your title and meta description as they may appear in Google, with pixel-width checks.

Runs in your browser
Robots.txt Generator

Build a robots.txt file with disallow rules, sitemap links and an AI crawler policy.

Runs in your browser
XML Sitemap Generator

Create a valid sitemap.xml from a list of URLs, with optional lastmod dates.

Runs in your browser
Hreflang Tag Generator

Generate hreflang annotations for multilingual sites as HTML, sitemap XML or HTTP headers.

Runs in your browser
UTM Link Builder

Add UTM campaign parameters to any URL with consistent naming and presets.

Runs in your browser
URL Slug Generator

Turn titles into clean, SEO-friendly URL slugs, with Turkish and Arabic transliteration.

Runs in your browser
.htaccess Redirect Generator

Generate 301 redirects, HTTPS and www rules for Apache, plus nginx equivalents.

Runs in your browser
HTTP Header Checker

See the status code and every response header of a URL, with quick performance and hygiene checks.

URL analysis
Redirect Checker

Trace every hop of a URL redirect chain and spot chains, loops and temporary redirects.

URL analysis
Security Headers Checker

Grade a site's HTTP security headers: HSTS, CSP, X-Frame-Options and more, with fixes.

URL analysis
Open Graph Preview Checker

See how a link will look when shared on Facebook, LinkedIn, X and WhatsApp, and check its tags.

URL analysis
Robots.txt Tester

Test whether Googlebot, Bingbot and AI bots may crawl a URL under a live robots.txt.

URL analysis
XML Sitemap Validator

Validate a sitemap.xml for format errors, duplicates, off-host URLs and broken or redirected links.

URL analysis
Hreflang Checker

Check a page's hreflang tags, verify each alternate loads and links back, and find missing return links.

URL analysis
SSL Certificate Checker

Check a site's SSL/TLS certificate: expiry, issuer, hostname match, chain trust, TLS version and HSTS.

URL analysis
DNS Lookup with SPF and DMARC Check

Look up A, AAAA, MX, NS, TXT, CNAME, SOA and CAA records and check email SPF and DMARC.

URL analysis
Heading Structure Checker

Extract a page's H1–H6 outline and flag missing or multiple H1s, skipped levels and empty headings.

URL analysis
Image Alt Text Checker

Find images without alt text on any page, plus empty, weak and unsized images.

URL analysis
Website SEO Audit Crawler

Crawl up to 20 pages of your site, score every page and see the issues that repeat across the whole site.

URL analysis
Broken Link Checker

Find broken, redirected and blocked links on any page, with the anchor text so you can fix them fast.

URL analysis
Structured Data Checker

Validate JSON-LD schema on any URL: required and recommended fields per type, syntax errors and rich-result fit.

URL analysis
Keyword & Question Finder

Turn one seed keyword into dozens of real search suggestions, questions and long-tail variations.

URL analysis
Competitor Content Gap Checker

Compare your page with up to two competitors: depth, structure, topics they cover that you miss.

URL analysis
Bulk Meta Tag Checker

Paste up to 25 URLs and check titles, descriptions, canonicals, H1s and duplicates in one table.

URL analysis
Page Weight Checker

See how heavy a page really is: HTML, CSS, JavaScript, images and fonts, with the biggest files and quick wins.

URL analysis

Web Design Tools

Browser-based tools for colour, images, QR codes and planning.

Website Cost Calculator

Estimate a website budget from site type, pages, languages and features, with hours, timeline and a breakdown.

Runs in your browser
Image Compressor and WebP Converter

Compress and resize JPEG, PNG and other images, or convert them to WebP and AVIF, without uploading anything.

Runs in your browser
WCAG Color Contrast Checker

Test any text and background color pair against WCAG AA and AAA, with APCA and one-click fixes.

Runs in your browser
QR Code Generator

Make a static QR code for a link, Wi-Fi, contact card, email, phone or SMS. PNG and SVG, no tracking.

Runs in your browser
CSS Minifier

Compress CSS by removing comments, whitespace and the last semicolons.

Runs in your browser
Color Converter: HEX, RGB, HSL, OKLCH

Convert any color between HEX, RGB, HSL, HSV, CMYK and OKLCH, with contrast on white and black.

Runs in your browser
Color Palette Generator

Generate shade scales and color harmonies from one base color, with CSS and Tailwind export.

Runs in your browser
CSS Gradient Generator

Design linear, radial and conic CSS gradients with up to three color stops and copy the code.

Runs in your browser
CSS Box Shadow Generator

Create single or smooth layered CSS box shadows with a live preview.

Runs in your browser
CSS Border Radius Generator

Round corners with four sliders or generate organic blob shapes, with live preview.

Runs in your browser
Glassmorphism CSS Generator

Create frosted-glass UI cards with backdrop-filter blur, transparency and border controls.

Runs in your browser
CSS clamp() Generator for Fluid Typography

Generate fluid clamp() values that scale smoothly between two viewport widths.

Runs in your browser
PX to REM Converter

Convert between px, rem, em, pt and vw with a custom base font size.

Runs in your browser
Type Scale Generator

Build a modular typographic scale from a base size and ratio, with CSS variables.

Runs in your browser
Aspect Ratio Calculator

Find the aspect ratio of any size, and calculate the missing width or height.

Runs in your browser
CSS Flexbox Generator

Play with flex-direction, wrap, justify-content and align-items and copy the CSS.

Runs in your browser
Cubic Bezier Easing Generator

Design CSS easing curves visually, preview the motion and copy cubic-bezier().

Runs in your browser
SVG Blob Generator

Generate smooth organic blob shapes as SVG with adjustable points and randomness.

Runs in your browser
Image Resizer

Resize images by width, height, exact size or percent, in your browser.

Runs in your browser
Image to Base64 Converter

Convert an image to a Base64 data URI, with ready-made HTML and CSS snippets.

Runs in your browser
Base64 to Image Decoder

Decode a Base64 string or data URI back into an image you can preview and download.

Runs in your browser
SVG Optimizer and Minifier

Shrink SVG files by removing editor metadata, comments and extra precision.

Runs in your browser
SVG to PNG Converter

Convert SVG files or code to a PNG at any size, with a transparent or solid background.

Runs in your browser
Favicon Generator

Create favicon.ico, PNG icons, an Apple touch icon and a web manifest from one image.

Runs in your browser
Placeholder Image Generator

Create placeholder images of any size and color as PNG or SVG.

Runs in your browser
Color Blindness Simulator

See how an image or a set of colors looks with protanopia, deuteranopia, tritanopia and achromatopsia.

Runs in your browser

Developer & Text Tools

JSON, encoding, regex, diff, hashing and text conversion.

JSON Formatter and Validator

Format, minify, sort and validate JSON with exact error positions.

Runs in your browser
Base64 Encoder and Decoder

Encode text to Base64 or decode it back, with full Unicode and URL-safe support.

Runs in your browser
URL Encoder and Decoder

Percent-encode or decode URLs and query strings, and inspect their parts.

Runs in your browser
HTML Entities Encoder and Decoder

Escape special characters as HTML entities or decode entities back to text.

Runs in your browser
JWT Decoder

Decode a JSON Web Token to read its header, payload and expiry. Nothing leaves your browser.

Runs in your browser
Hash Generator: MD5, SHA-1, SHA-256, SHA-512

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes, with optional HMAC.

Runs in your browser
UUID Generator (v4 and v7)

Generate random UUID v4 or time-ordered UUID v7 in bulk with format options.

Runs in your browser
Secure Password Generator

Generate strong random passwords with a cryptographic source and an entropy readout.

Runs in your browser
JSON ↔ CSV Converter

Convert JSON arrays to CSV and CSV back to JSON with delimiter and type options.

Runs in your browser
Regex Tester

Test JavaScript regular expressions live, with highlighted matches, groups and replace.

Runs in your browser
Text Diff Checker

Compare two texts by line, word or character and see additions and removals.

Runs in your browser
Case Converter

Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more.

Runs in your browser
Lorem Ipsum Generator

Generate placeholder text in Latin, Turkish or Arabic by paragraph, sentence or word.

Runs in your browser
Sort Lines and Remove Duplicates

Sort, reverse, shuffle, trim, number and deduplicate lines of text in one step.

Runs in your browser
Markdown Preview and HTML Converter

Write Markdown and see a live preview, then copy the clean HTML.

Runs in your browser
Unix Timestamp Converter

Convert Unix timestamps to readable dates and back, in any time zone.

Runs in your browser
JavaScript Minifier

Remove comments and extra whitespace from JavaScript to shrink file size safely.

Runs in your browser
HTML Minifier

Strip comments and collapse whitespace in HTML while keeping pre, script and style intact.

Runs in your browser
Number Base Converter: Binary, Octal, Decimal, Hex

Convert numbers between binary, octal, decimal, hexadecimal and base 36, including very large values.

Runs in your browser

Marketing & Business Calculators

ROAS, conversion, VAT, margin, A/B tests and contact links.

Free, no account

Every tool works without logging in. Send a result to your team with a shareable link if you wish.

Privacy first

Tools for images, colour and QR codes run entirely in your browser; your files are never uploaded.

Transparent methods

Scoring tools show which check carries what weight. No black box, no "guarantee" claims.

Classic tools

Our older tools keep working. New versions will move to this page soon.

Let's turn the findings into action

Talk to our specialists about prioritising and implementing the fixes.

Request a free consultation