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All tools
Business
- Discount profit impact calculator
- Break-even ROAS calculator
- Bundle pricing calculator
- Free shipping threshold calculator
- Freelance minimum hourly rate calculator
- Landed cost per unit calculator
- Return cost and refund decision calculator
- Multi-product break-even calculator
- Contribution margin calculator
- Project deposit and milestone payment calculator
- Cash runway and burn rate calculator
- Customer acquisition payback calculator
- Hiring impact on runway calculator
- Profit margin and target-price calculator
- Markup versus margin calculator
- Etsy fee and net profit calculator
- Stripe fee and required-charge calculator
- PayPal merchant fee calculator
- Cash conversion cycle calculator
- Days sales outstanding calculator
- Inventory turnover and inventory days calculator
- MRR and ARR movement calculator
- Customer and revenue churn calculator
- Net and gross revenue retention calculator
- Customer lifetime value and LTV:CAC calculator
- ROAS and marketing efficiency calculator
- Average order value calculator
- Investment fee drag comparison calculator
- Compound interest with increasing contributions calculator
- Savings goal calculator
- Extra loan payment calculator
- Debt snowball versus avalanche calculator
- Fixed-rate loan payment calculator
- Inflation-adjusted purchasing power calculator
- Refinance break-even calculator
- Invoice aging worksheet
- Inventory reorder-point scenario planner
- CSV amount reconciliation
Marketing
- Bulk UTM campaign builder
- Search Console quick-win CSV analyzer
- Robots.txt rules tester
- Sitemap XML validator and splitter
- Hreflang tag generator
- Hreflang consistency checker
- Bulk meta title and description audit
- Search Console query overlap analyzer
- Keyword list organization and intent tagging
- Social campaign link QA checker
- SERP snippet preview
- Robots.txt generator
- URL-list sitemap generator
- Local business structured-data generator
- Structured-data markup linter
- Canonical consistency auditor
- Redirect chain checker
- Internal broken-link checker
- Image alt-text coverage audit
- Google review link helper
- Calendar event file builder
- Email list syntax cleaner and deduplicator
- DMARC aggregate report reader
- Email header analyzer
- SPF lookup-budget checker
- DMARC record generator and checker
- DKIM selector and record checker
- Email subject and preheader preview
- Email signature builder
- Mailto link builder
- One-click unsubscribe header checker
- SMTP TLS report reader
Creators
Utilities
- CSV delimiter converter and repair
- Compare two lists
- Compress image to a target KB size
- JSON to CSV flattener
- PDF splitter by page or file size
- Manual image blur and redaction
- Pixels to inches print calculator
- Fractional inches and metric length converter
- Data storage unit converter
- Download and upload time calculator
- Remove duplicate lines
- CSV to JSON converter
- JSON formatter and validator
- Base64 encoder and decoder
- URL encoder and decoder
- Markdown to HTML converter
- Text statistics and character counter
- Aspect ratio and resize calculator
- Batch image resizer
- HEIC to JPG converter
- WebP to JPG converter
- Images to PDF
- PDF merger
- PDF page organizer and rotator
- Image cropper
- Ingredient-specific cups to grams converter
- Recipe serving scaler
- Cake pan size converter
- Days between dates calculator
- Add or subtract days from a date
- Length converter
- Weight and mass converter
- Temperature converter
- Area converter
- Volume converter
- Speed converter
- Time duration converter
- Data size converter
- Angle converter
- Pressure converter
- Energy converter
- Fuel economy converter
- CSV column mapper and import-template builder
- Join two CSV files by a key
All articles
Business
- Markup vs Margin: Formulas, Examples and Pricing
- Calculate a Freelance Hourly Rate from Billable Hours
- MRR, Churn, NRR and GRR: SaaS Retention Examples
- Payment Fee Pricing: Calculate Fees and Required Charges
- Discount profit impact: calculate the extra sales volume needed
- How to calculate a free shipping threshold using contribution margin
- Landed cost per unit and return allowance: a pricing workflow
- Multi-product break-even analysis: weighted contribution and sales mix
- Break-even ROAS vs MER: formulas, costs and a worked example
- Cash runway and hiring impact: calculate burn and compare scenarios
- CAC payback vs customer lifetime value: formulas and churn example
- Cash conversion cycle formula: DIO, DSO and DPO worked example
- Savings Goals, Increasing Contributions, Fees and Inflation
- Loan Payments, Extra Principal and Refinance Break-Even
- Debt Snowball vs Avalanche with a Fixed Monthly Budget
Marketing
- UTM Naming Conventions: A Campaign URL Checklist
- Search Console Query Overlap Analysis: A Practical CSV Workflow
- Robots.txt vs Noindex: Crawl Rules, Indexing and Practical Tests
- How to Validate and Split an XML Sitemap: Limits and Examples
- Hreflang Return Links Audit: Self References, CSV Examples and Checks
- Use a SERP Snippet Preview Without Inventing SEO Limits
- Generate robots.txt and a URL-List Sitemap for a Small Site
- Generate and Check LocalBusiness JSON-LD
- Audit Canonicals, Redirect Chains and Internal Links from CSV
- Audit Image Alt Text: Missing, Empty and Unhelpful Alternatives
Creators
Utilities
- Fix CSV Files Opening in One Column: Delimiters and Quotes
- Unit Conversion: US vs Imperial, Bytes vs Bits and Rounding
- Convert nested JSON to CSV without losing identifiers or arrays
- Compress an image below an upload limit: bytes, format and dimensions
- Unit conversion mistakes: area, temperature, speed, pressure and energy
- Create, Merge, Split and Reorder PDFs Locally
- Fit vs Center Crop: Batch Resize and Exact Image Crops
- HEIC and WebP to JPEG: Compatibility and Information Loss
- Solid Image Redaction vs Blur: A Local Sharing Workflow
- CSV to JSON and Strict JSON Validation: Preserve Leading Zeroes
- Base64 vs URL Encoding: Unicode, Plus Signs and Double Encoding
- Markdown Preview, Duplicate Lines and Unicode Text Counts
- Print Size, PPI and Fractional Inches to Millimetres
- GB vs GiB and Mbps vs MB/s: Estimate File Transfer Time
- Cups to Grams, Serving Scaling and Cake-Pan Conversions
- Days Between Dates and Date Offsets: Inclusive vs Elapsed