La boîte à outils SEO

🛡️ Autorité et confiance

Domain Trust Signals

A real, verifiable trust report: domain age, SSL status, security headers, and sitemap/robots presence — combined in one check. (Not a substitute for Moz DA or Ahrefs DR — those are paid, proprietary metrics we don't fabricate.)

Utiliser l'outil → 🏷️ Audit du site

Meta Tags Analyzer

Check any page's title tag, meta description, canonical URL and robots directives for length and SEO issues.

Utiliser l'outil → 🤖 Audit du site

Robots.txt Tester

Fetch and check any website's robots.txt, and test whether a specific path is allowed to be crawled.

Utiliser l'outil → 🗺️ Audit du site

XML Sitemap Validator

Check that a sitemap URL is valid XML, see how many URLs it lists, and whether lastmod dates are present.

Utiliser l'outil → 📱 Audit du site

Social Share Preview

See how a URL will look when shared on Facebook, LinkedIn or Twitter/X — pulls the real Open Graph and Twitter Card tags.

Utiliser l'outil → ⚖️ Audit du site

Text-to-HTML Ratio Checker

Calculate how much of a page is visible text versus markup — a low ratio can be a thin-content signal.

Utiliser l'outil → 🧩 Audit du site

Schema Markup Validator

Finds every JSON-LD structured-data block on a page, lists the schema types used, and flags missing required fields.

Utiliser l'outil → ✔️ Audit du site

On-Page SEO Checker

Enter a page and your target keyword — see whether it appears in the title, H1, URL, meta description and opening text.

Utiliser l'outil → 📐 Audit du site

Heading Structure Checker

See a page's full H1–H6 outline and catch structural issues like a missing H1, multiple H1s, or skipped heading levels.

Utiliser l'outil → 📑 Audit du site

Duplicate Title/Meta Comparer

Compare two URLs' titles and meta descriptions to check how similar or duplicated they are.

Utiliser l'outil → ✅ Outils de backlinks

Backlink & Anchor Text Verifier

Paste a page URL and your domain — we'll confirm whether the link exists, show the exact anchor text, and whether it's dofollow.

Utiliser l'outil → 🔬 Outils de backlinks

Link Analyzer

Full breakdown of every link on a page: internal vs external counts, dofollow vs nofollow, and the external domains linked to.

Utiliser l'outil → 🔗 Outils de backlinks

Broken Link Checker

Scan a page's links and flag any that return an error (404, 500, etc). Checks up to 20 links per scan.

Utiliser l'outil → 📅 Outils de domaine

Domain Age Checker

Real WHOIS lookup showing when a domain was registered, its age, and expiry date.

Utiliser l'outil → 🌐 Outils de domaine

DNS Lookup

Look up a domain's A, AAAA, MX, TXT, NS and CNAME records in real time.

Utiliser l'outil → 📍 Outils de domaine

IP Lookup

Resolve a domain to its IPv4 and IPv6 addresses.

Utiliser l'outil → 🔄 Outils de domaine

Reverse DNS (PTR) Lookup

Look up the hostname an IP address resolves back to. (Note: this is a genuine PTR lookup, not a list of every domain hosted on that IP — no free source can honestly provide that.)

Utiliser l'outil → 🔒 Outils de domaine

SSL Certificate Checker

Check a domain's SSL certificate — issuer, validity dates, and days remaining before it expires.

Utiliser l'outil → 📡 Outils de domaine

HTTP Header Checker

See a page's full response headers — server, caching, security headers and more.

Utiliser l'outil → ↪️ Outils de domaine

Redirect Checker

Follow a URL's complete redirect chain step by step, and see the final destination and status code.

Utiliser l'outil → 🔍 Outils de contenu

SERP Snippet Preview

See how your title and description will actually look in Google search results, live as you type — no page load needed.

Utiliser l'outil → 📊 Outils de contenu

Keyword Density Checker

Paste your content or a URL to see keyword and keyphrase frequency, and spot over-optimization.

Utiliser l'outil → 📝 Outils de contenu

Word Counter, Character Counter & Reading Time

Instant word count, character count, estimated reading time, and a Flesch reading-ease score as you type or paste.

Utiliser l'outil → 🧠 Outils de contenu

Meta Title & Description Generator

Template-based title and meta description generator with live length meters. (Formula-based, not AI — we don't label template output as "AI-generated.")

Utiliser l'outil → 🎯 Outils de mots-clés

Keyword Intent Classifier

A simple, transparent rule-based classifier that suggests whether a keyword looks informational, commercial, transactional or navigational.

Utiliser l'outil → 🌱 Outils de mots-clés

Long-Tail Keyword Generator

Turn a seed keyword into dozens of long-tail variations using proven question, modifier and intent patterns — a starting list to research further.

Utiliser l'outil → 🏙️ SEO local

City + Service Keyword Generator

Combine your services with a list of cities to instantly generate local keyword and landing-page ideas for local SEO campaigns.

Utiliser l'outil → ⚙️ SEO technique

Robots.txt Generator

Build a clean, valid robots.txt file with the right Allow/Disallow rules and sitemap line — copy-paste ready.

Utiliser l'outil → 🏢 SEO local

LocalBusiness Schema Generator

Generate valid LocalBusiness JSON-LD structured data from your business details — helps local search understand your NAP info.

Utiliser l'outil → 📇 SEO local

NAP Consistency Checker

Paste your business Name, Address and Phone as they appear on different listings to catch inconsistencies that hurt local SEO.

Utiliser l'outil → 📈 Outils pour agences SEO

Backlink Campaign Calculator

Plan a link-building campaign: enter your link target, cost per link and duration to see total cost, links per month, and a week-by-week pace.

Utiliser l'outil → 💰 Outils pour agences SEO

Guest Post ROI Calculator

Estimate the potential return of a backlink campaign from expected traffic, conversion rate and order value. All figures are clearly-labelled estimates.

Utiliser l'outil → 🗂️ Outils pour agences SEO

SEO Campaign Planner

Enter your website, target country, budget, link count and duration to generate a structured, phase-by-phase campaign outline you can copy.

Utiliser l'outil → 🧮 Outils pour agences SEO

Monthly SEO Budget Calculator

Break a monthly SEO budget across backlinks, content and technical work to see how many links and articles it realistically covers.

Utiliser l'outil → ⚓ Outils de backlinks

Anchor Text Distribution Planner

Enter your total link count to get a natural-looking anchor text mix (branded, exact, partial, generic, URL) so your profile does not look over-optimized.

Utiliser l'outil → 🎚️ Outils pour agences SEO

Required Backlinks Estimator

A rough, transparent estimate of how many quality links a campaign might target based on competition level — clearly labelled as a planning heuristic, not a guarantee.

Utiliser l'outil → 🖼️ SEO technique

Image Alt Text Checker

Scan a page and list every image, flagging any that are missing alt text — important for accessibility and image SEO.

Utiliser l'outil → 👁️ Outils de texte

Outil de caractères invisibles

Détecte et supprime les caractères Unicode invisibles ou masqués comme les espaces de largeur nulle, le BOM et les espaces insécables, entièrement dans votre navigateur.

Utiliser l'outil → 🔤 Outils de texte

Case Converter

Convert text to UPPERCASE, lowercase, Title Case, or Sentence case instantly in your browser.

Utiliser l'outil → ✂️ Outils de texte

Remove Extra Spaces

Strip multiple spaces, leading/trailing spaces, and blank lines from text — great for cleaning copy-pasted content.

Utiliser l'outil → 📋 Outils de texte

Duplicate Line Remover

Remove duplicate lines from any list or block of text. Useful for cleaning keyword lists, URLs, and data exports.

Utiliser l'outil → 🔢 Outils de texte

Line Sorter

Sort lines of text alphabetically, reverse-alphabetically, or by length. Works entirely in your browser.

Utiliser l'outil → 🔍 Outils de texte

Find & Replace Tool

Find and replace text within a block of content — case-sensitive or case-insensitive, with an exact match count.

Utiliser l'outil → 🔁 Outils de texte

Text Reverser

Reverse text character by character, or reverse the order of lines — handy for quick text manipulations.

Utiliser l'outil → 📄 Outils de texte

Lorem Ipsum Generator

Generate placeholder Lorem Ipsum text of any length — words, sentences, or paragraphs — for design mockups and templates.

Utiliser l'outil → 🔗 Outils de texte

URL Encoder / Decoder

Encode or decode URL-encoded strings (percent-encoding). Useful for query strings, link building and redirect work.

Utiliser l'outil → 🔐 Outils de texte

Base64 Encoder / Decoder

Encode plain text to Base64 or decode Base64 back to readable text — runs entirely in your browser.

Utiliser l'outil → ⚙️ Outils pour développeurs

JSON Formatter & Validator

Paste raw JSON to format it with proper indentation, validate its syntax, and minify it. All processing happens in your browser.

Utiliser l'outil → 🌐 Outils pour développeurs

HTML Entity Encoder / Decoder

Encode special characters to HTML entities (& → &) or decode entities back to readable characters.

Utiliser l'outil → 📊 Outils marketing

UTM Campaign Builder

Build properly formatted UTM tracking URLs for Google Analytics campaigns — source, medium, campaign, term, and content.

Utiliser l'outil → 🕐 Outils pour développeurs

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Enter a timestamp or a date to see both formats.

Utiliser l'outil → 🎨 Outils de design et couleur

HEX ↔ RGB Colour Converter

Convert between HEX and RGB colour values instantly. Also shows the HSL equivalent. Works in your browser.

Utiliser l'outil → 🔲 Outils de design et couleur

Colour Contrast Checker

Check the contrast ratio between two colours against WCAG AA and AAA accessibility standards for text readability.

Utiliser l'outil → 🌈 Outils de design et couleur

CSS Gradient Generator

Create linear and radial CSS gradients with a visual preview and ready-to-copy CSS code. No libraries required.

Utiliser l'outil → 📐 Outils de design et couleur

Aspect Ratio Calculator

Calculate image dimensions while maintaining aspect ratio. Enter any two dimensions to find the third. Ideal for responsive design.

Utiliser l'outil → ✍️ Outils marketing

Blog Title Generator

Generate catchy blog title ideas from a topic using proven headline patterns. Template-based — clearly labelled, not AI.

Utiliser l'outil → 📱 Outils marketing

Social Media Image Size Guide

Current recommended image dimensions for Facebook, Instagram, Twitter/X, LinkedIn, Pinterest and YouTube — all in one reference.

Utiliser l'outil → 🗂️ SEO local

NAP Formatter

Format your business Name, Address and Phone into a consistent NAP block ready to paste into citations, websites and directories.

Utiliser l'outil → 📍 SEO local

Local Meta Description Generator

Generate localised meta descriptions using your business name, service, and target city. Template-based with live character count.

Utiliser l'outil → ❓ SEO technique

FAQ Schema Generator

Enter questions and answers to generate valid FAQPage JSON-LD structured data — copy-paste ready for your website.

Utiliser l'outil → ％ Calculatrices

Percentage Calculator

Work out percentages three ways: X% of Y, X is what % of Y, and percentage increase/decrease.

Utiliser l'outil → 🏷️ Calculatrices

Discount Calculator

Enter a price and a discount to see the amount saved and the final price you pay.

Utiliser l'outil → 🎂 Calculatrices

Age Calculator

Calculate exact age in years, months and days from a date of birth to any date.

Utiliser l'outil → ⏱️ Calculatrices

Hours Calculator

Add up hours and minutes between a start and end time, with an optional break deduction.

Utiliser l'outil → 🏦 Calculatrices

Loan Calculator

Calculate monthly loan repayments, total interest and total cost from amount, rate and term.

Utiliser l'outil → 📈 Calculatrices

Compound Interest Calculator

See how savings or investments grow over time with compound interest and regular contributions.

Utiliser l'outil → 💰 Calculatrices

Profit Margin Calculator

Turn cost and revenue into gross profit, profit margin % and markup %.

Utiliser l'outil → 📊 Calculatrices

ROI Calculator

Calculate return on investment as a percentage and net return from amount invested and returned.

Utiliser l'outil → 📣 Calculatrices

CPM Calculator

Work out CPM, total ad cost or impressions — solve for whichever value you're missing.

Utiliser l'outil → 🖱️ Calculatrices

CPC & CTR Calculator

Calculate cost-per-click, click-through rate and total spend for a PPC campaign.

Utiliser l'outil → 🎯 Calculatrices

Conversion Rate Calculator

Turn visitors and conversions into a conversion rate %, plus cost per conversion.

Utiliser l'outil → ⚖️ Calculatrices

BMI Calculator

Calculate Body Mass Index from height and weight (metric or imperial) with WHO category ranges.

Utiliser l'outil → 🌳 Outils pour développeurs

JSON Viewer

Paste JSON and explore it as a collapsible, colour-coded tree — great for large API responses.

Utiliser l'outil → 🧹 Outils pour développeurs

HTML Formatter & Beautifier

Re-indent messy or minified HTML into clean, readable markup with consistent nesting.

Utiliser l'outil → 🎨 Outils pour développeurs

CSS Minifier

Strip comments and whitespace from CSS to shrink file size for faster page loads.

Utiliser l'outil → 🔍 Outils pour développeurs

Regex Tester

Test JavaScript regular expressions against sample text and see every match highlighted live.

Utiliser l'outil → 0️⃣ Utilitaires

Text to Binary Converter

Convert text to binary (and back) using standard UTF-8 byte encoding.

Utiliser l'outil → 1️⃣ Utilitaires

Binary to Text Converter

Decode binary (space-separated 8-bit bytes) back into readable UTF-8 text.

Utiliser l'outil →