Outils SEO et sites web
Des outils pour ceux qui créent, gèrent ou promeuvent des sites web. Auditez une page pour repérer les problèmes de référencement, trouvez les liens cassés, contrôlez un sitemap et un fichier robots, validez les données structurées, mesurez le poids d'une page et voyez avec quoi un site est construit.
Saisissez une adresse et obtenez un rapport clair, avec des explications simples et la prochaine étape à suivre.
Site audits and checks Tout voir
Meta Tag & Open Graph CheckerPreview a page's title, description and social link card, and spot missing tags.Website Health ReportInclus avec UnlimitedOne report on whether a site loads, is set up safely and is easy to find.Accessibility CheckerInclus avec UnlimitedFind common accessibility problems in a web page, with a fix for each.AI Crawler CheckerInclus avec UnlimitedSee which AI and search crawlers your robots.txt allows or blocks.Page Speed AnalyserInclus avec UnlimitedMeasure server response time, page weight and caching, with a grade and fixes.Website Technology DetectorInclus avec UnlimitedFind out what a website is built with, and see the evidence for each finding.Page Image AuditInclus avec UnlimitedCheck a page's images for size, format, alt text and loading, with savings estimates.SEO CheckerInclus avec UnlimitedAudit one page for the things that affect how it shows up in search.Broken Link CheckerInclus avec UnlimitedFind dead, redirected and slow links on a page.Sitemap & Robots.txt CheckerInclus avec UnlimitedCheck the files that tell search engines what to crawl.Structured Data ValidatorInclus avec UnlimitedCheck a page's structured data for errors and missing properties.Website Health Report by EmailInclus avec UnlimitedGet a short health report for your site in your inbox every week.Robots.txt TesterTest whether pasted robots.txt rules allow or block paths for a crawler.HTML Heading Structure CheckerPaste a page's HTML to see its H1 to H6 outline, the words under each heading and any skipped or missing levels.Image Alt Text CheckerPaste HTML to list every image and flag missing, empty, generic, file-name or over-long alt text.Internal Link Anchor Text AnalyserPaste HTML to see the anchor text of your internal links, which words repeat and which links say nothing.Canonical and Meta Robots CheckerPaste the head of a page to check its canonical link and robots tags for errors and mixed signals.External Link Rel CheckerPaste HTML to audit outbound links for nofollow, sponsored, ugc and new-tab settings.Redirect Chain and Loop FinderPaste a list of old and new addresses to find chains, loops, clashes and self-redirects, with a cleaned list.URL Structure AuditorCheck a list of page addresses for length, capitals, underscores, parameters, depth and other tidiness issues.
Tags, sitemaps and markup Tout voir
Schema Markup GeneratorCreate structured data for search engines, ready to paste into your page.Redirect Rules GeneratorMake redirect rules for Apache and nginx from a list of old and new addresses.Meta Tag GeneratorCreate the head tags for a web page, with length guides and a search preview.Sitemap XML GeneratorTurn a list of page addresses into a ready-to-upload sitemap file.Hreflang Tag GeneratorMake the language and region link tags for your pages, plus sitemap lines.Robots.txt GeneratorBuild a robots.txt file for your site, with presets for common setups.Title Tag PreviewPreview how your page title and description may look in search results.Sitemap URL ExtractorPull the list of addresses out of a pasted sitemap, with last modified dates.Open Graph PreviewType or fetch a title, description and image and see large, small and side bar link cards.Search Snippet Pixel Width CheckerMeasure the real pixel width of a title and description and see exactly where they would be cut on desktop and phone.
Keywords and content Tout voir
Headline AnalyserScore a headline for length, power words, numbers and format.Keyword GrouperGroup a long keyword list into topics by the words the phrases share, with optional search volumes.Keyword CombinerCombine up to four lists of words into every phrase, with optional phrase and exact match formats.Content Brief Outline BuilderTurn a main keyword and related terms into title ideas, a section outline, questions to answer and a word target.Search Intent ClassifierSort a list of keywords by what the searcher wants: to learn, compare, buy or find a site.Keyword Cannibalisation CheckerFind keywords that more than one of your pages is aiming at, from a list of page and keyword pairs.
Marketing and social Tout voir
Email Signature GeneratorBuild a simple email signature with your contact details and social links.Campaign Link BuilderAdd campaign tags to a web address, one at a time or in a list.Email Subject Line TesterScore an email subject line and see what to fix before you send it.UTM Link ParserRead the UTM source, medium and campaign from any link, and spot missing tags.Social Post Character CheckerCount a post against the length limits of the main kinds of social network, with web address and emoji rules.Social Image Size CropperCrop a picture to the usual social image sizes with a zoom and a focus point, then download it.Hashtag OrganiserRemove repeated hashtags, turn phrases into readable tags, sort them and cap the number for a post.A/B Test Significance CalculatorTest whether the difference between two conversion rates is real, with the p-value, z-score and confidence interval.A/B Test Sample Size CalculatorWork out how many visitors each version needs before you can trust a test, and how long that takes.Conversion Rate CalculatorTurn funnel counts into step rates, drop-offs and an overall conversion rate with a margin of error.CPC, CPM and CPA CalculatorWork out click, thousand-view and acquisition costs, plus click-through and conversion rates, from your ad numbers.Customer Lifetime Value CalculatorEstimate what a customer is worth over time, compare it with the cost of winning them and see the payback period.ROAS CalculatorWork out return on ad spend, the break-even ROAS for your margin, your profit and the ROAS needed for a profit target.Email List Growth CalculatorProject the size of your email list month by month with new sign-ups, referrals and unsubscribes.Engagement Rate CalculatorWork out social engagement rate by followers, reach and impressions, and the average per post.
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Guides à lire d'abord
How to do a quick SEO audit on a small website
Run a quick SEO audit on a small website with this practical checklist covering crawling, indexing, titles, links, redirects, sitemaps and structured data.
How to write a meta description that gets clicks
Write meta descriptions that match the page and earn clicks: the right length, what to include, before and after examples, and how to check them in bulk.
Schema markup for small sites: a practical guide
What structured data is, which types matter for a small site, a worked JSON-LD example, and how to test it without promising rich results.