FREE ONLINE TOOLS
Data Tools
Data tools for CSV, JSON, YAML, tables, validation, conversion, mini dashboards, and structured handoff artifacts. The listed tools are indexable, linked from FastTool hubs, included in sitemap, and exposed in machine-readable discovery files.
PUBLIC DATA INDEX
12 Data tools
A/B Test False Discovery Firewall Experiment Firewall
Check whether an A/B test win survives sample-ratio mismatch, multiple-comparison correction, practical effect thresholds and guardrail harm before shipping.
Open toolCSV Re-Identification Risk Firewall Privacy Firewall
Check whether a CSV can still identify people after names and emails are removed. Flag risky column combinations, low-k groups, sensitive fields and export a sanitized proof packet.
Open toolCSV to JSON Converter Data
Convert pasted CSV or small CSV files to JSON in the browser, handle quoted fields, preview rows, choose delimiter, then copy or download output.
Open toolCSV to SQL Insert Generator Data
Convert CSV rows into SQL INSERT statements in the browser, set table name, inspect inferred columns, and copy a reviewable SQL script.
Open toolCSV-to-Mini Dashboard Builder Data
Turn a lightweight dataset brief, metrics, filters, chart needs, validation rules, and audience into a runnable single-file dashboard prototype, data spec JSON, action contract, smoke test, publish checklist, and proof receipt.
Open toolData Contract Drift Blast Radius Lab Data
Analyze redacted API, event and table schema changes for breaking data contract drift and downstream consumer blast radius.
Open toolDifferential Privacy Budget Noise Lab Data
Plan differential privacy releases with epsilon budgets, Laplace/Gaussian noise, composition pressure and public-output review gates.
Open toolExact Shapley Attribution Lab Exact 2^M
Calculate exact Shapley values over every coalition for an explicitly defined linear, pairwise-interaction or unanimity value function.
Open toolMetric Anomaly Root Cause Atlas Data
Turn metric drops, traffic shifts, conversion changes or segment anomalies into a weighted root-cause atlas with contribution waterfall, cause clusters, hypotheses, SVG, CSV, Markdown and JSON receipt.
Open toolML Dataset Leakage & Drift Lab Leakage + Drift
Compare train and test CSV data for exact and near duplicates, ID or group leakage, temporal overlap, target proxies and feature distribution drift.
Open toolQR Code Generator Data
Create QR codes for URLs, WiFi, vCard, email or SMS, adjust color and error correction, then download PNG or SVG output.
Open toolSynthetic Control Causal Impact Lab Data
Estimate launch, campaign or pricing impact with synthetic-control counterfactual weights, actual-vs-counterfactual SVG, effect timeline CSV, weights CSV, Markdown notes and JSON receipt.
Open toolQuality boundary
Use these tools for browser-first drafts, calculations, receipts, and exportable artifacts. For money, safety, legal, medical, regulated, or production-critical decisions, verify the output before acting.