Free tools
15 small pieces of Meelu, opened up and made free to use. No account, no card, no trial that expires into a paywall. Most of them run entirely inside your browser, so the file you drop in never reaches a server.
Search and content
5 toolsCrawl a site, then check what it says once you get there.
SEO audit
Website SEO checker and technical site crawler
Crawl a domain, page or sitemap — up to 100 URLs — and get 63 technical checks in a table you can export. Titles, canonicals, redirects, structured data, hreflang and AI crawler access.
Broken link checker
Dead link finder and 404 checker
Test every internal link, external link and image — up to 750 destinations — for 404s, dead domains and redirect chains. Shows the page and anchor text for each one.
Readability checker
Flesch, grade level and the sentences dragging you down
Six readability formulas computed exactly, plus the long sentences, complex words and passive constructions behind the number.
Nothing uploadedSimilarity checker
Duplicate content and shared passages
Compare two documents or URLs and see how much they share — in both directions, since how much of yours is in theirs is a different question from the reverse.
Nothing uploadedAI content detector
Does this text read as machine-written?
A real classifier running in your browser, not a heuristic. States its own error rate plainly, including the false positives on formal and non-native English.
Runs in browserCustomers and feedback
2 toolsTwo files people already have, read properly instead of skimmed.
Review sentiment analysis
Score a CSV of reviews positive, negative or neutral
Every review labelled, the complaints ranked by how often they come up, and the reviews whose star rating disagrees with their wording.
Nothing uploadedLead sentiment analysis
Score a CRM export from what your team wrote
Finds deals still in your forecast that the notes say are dead, and ranks the objections costing you pipeline. Sales vocabulary, not review vocabulary.
Nothing uploadedMarketing analytics
4 toolsStatistical work that normally needs a data team, run on one file in your browser.
Traffic drop analyzer
Find the day it changed, and whether it was an update
Changepoint detection on a Search Console or GA4 export, with a forecast band and confirmed Google update dates lined up against what it found.
Nothing uploadedA/B test calculator
Significance, Bayesian, sequential and sample size
Frequentist and Bayesian analysis, always-valid sequential testing that survives daily peeking, sample size and MDE, CUPED, and a sample ratio mismatch check.
Attribution model
Markov and Shapley against last click
Feed it a GA4 conversion-path export and see how much credit last click is taking from your upper funnel — and which channels are lowering conversion rate rather than raising it.
Nothing uploadedMarketing mix model
Adstock, saturation and a budget reallocation
Fit a lite MMM on weekly spend by channel: carryover, diminishing returns, contribution per channel and where to move the next pound. Says plainly how much to trust it.
Nothing uploadedCustomer analytics
4 toolsFree web versions of the Meelu MCP use cases — one algorithm each, on one file, in your browser.
Cohort retention
Retention triangle by signup month
Build the grid from an event log or a customer table, find the month cohort quality changed, and test whether that change survives a significance check. Incomplete cohorts stay blank rather than counting as churn.
Nothing uploadedRFM segmentation
Recency, frequency, monetary — plus what it misses
The 11 named segments off a published 5×5 grid, then k-means over the same customers to show where the rules and the behaviour disagree. Two groups with one label need two different emails.
Nothing uploadedCustomer lifetime value
BG/NBD and Gamma-Gamma, not AOV × frequency
Fits an actual buy-till-you-die model: expected purchases, probability each customer is still alive, LTV:CAC by value group, and a Lorenz curve. Falls back and says so when the data cannot support it.
Nothing uploadedChurn prediction
A model trained on your file, scored on rows it never saw
Logistic regression against gradient-boosted trees, judged on held-out data, with permutation-ranked drivers, a calibration check and leakage detection that reports above the score, not below it.
Trains in browserEvery tool here is free, needs no account, and most never send your file anywhere. The open source MCP server runs this same analysis inside your own AI assistant, where it can join several files and follow one question with another. Join the waitlist to hear what lands next.