Marketing
A/B Calculator
Statistical significance (Z-test) and confidence intervals.
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Professional tools for marketing, analytics, and everyday web ops.
Statistical significance (Z-test) and confidence intervals.
Create ad copy variants for search, social, and retargeting campaigns.
Build GA4 event names and parameter schemas for reliable measurement plans.
Convert Unix timestamps and ISO 8601 values locally, switch between seconds and milliseconds, and inspect UTC vs local time without uploads.
Convert CSV exports into clean JSON locally, inspect headers and rows, and copy or download API-ready output without uploads.
Convert JSON arrays into clean CSV locally, flatten nested objects when needed, and copy or download spreadsheet-ready exports without uploads.
Estimate monthly payment, amortization, escrow, and early payoff savings.
Estimate contribution margin, break-even units, break-even revenue, and target-profit sales volume.
Project future value, total contributions, and interest earned with recurring monthly additions.
Convert JPG images to AVIF in batch with browser controls and queued server processing when needed.
Convert JPG images to WebP in batch with browser controls and queued server processing when needed.
Merge, split, extract pages, and compress PDF files with queued server processing.
Generate production-ready SQL queries from plain-language analytics tasks.
Generate QUERY and ARRAYFORMULA patterns for Google Sheets.
Build XLOOKUP or INDEX/MATCH formulas for multi-criteria lookups.
The right tool should load fast, solve the task cleanly, and get out of your way instead of acting like a full product suite.
Many tools run entirely in your browser. Server-backed tools upload files only when a queued job needs remote processing. No account, no paywalls, and no hidden upsell.
From UTM builders and A/B test calculators to JSON formatters and regex testers — all the tools you actually need, in one place. No bloat, no distractions.
Tools Hub is and will remain entirely free. We believe professional-grade tools should be accessible to everyone, from solo marketers to engineering teams.