The Blog
Guides, tips and how-tos for getting the most out of free online tools.
Format and beautify minified CSS, HTML and XML into clean, readable code — free online, in your browser. When to minify vs beautify.
Convert JSON to YAML free online for Docker, Kubernetes, GitHub Actions and config files — what changes, when to use YAML, and a quick converter.
The "multiply by 7" rule is a myth. Here's how to really calculate your dog's age in human years, with a free dog age calculator.
Learn how to calculate sales tax on any purchase — the formula, examples, and a free sales tax calculator for the total, tax and subtotal.
Generate TypeScript interfaces from a JSON sample for free — nested types included. Stop hand-typing API response types.
See how inflation erodes the value of money over time and how much you'll need to keep the same buying power — with a free inflation calculator.
Turn a CSV file into SQL INSERT statements free online — name your table and get ready-to-run queries. Great for seeding databases.
Convert height between centimetres and feet/inches easily — the conversion, quick reference points, and a free height converter.
Convert CSV to a Markdown table free online for READMEs, GitHub issues and docs — and turn Markdown tables back into CSV. Quick guide.
CSV all in one column, broken characters, or numbers turned to dates? Why CSVs open wrong in Excel and the fixes — including converting to .xlsx.
Excel (.xlsx) vs CSV (.csv) explained — formatting, formulas, size and compatibility — plus when to use each and how to convert between them.
Number the pages of any PDF in seconds, right in your browser — no software, no signup, and your file never leaves your device.