I Built 13 Free Browser Tools in a Weekend — Here's What I Learned

Last month I launched FreeTools — a collection of free, browser-based utilities. It started with 6 tools. Now it's 13 and growing. The twist? Zero backend. Zero frameworks. Zero build step. Just HTML, Tailwind CDN, and vanilla JavaScript. Here's what I built and what I learned. The Tool Suite Tool What it does Password Generator Cryptographically secure passwords via crypto.getRandomValues() Invoice Generator Professional invoices with live preview + PDF download Privacy Policy Generator GDPR-compliant policies from a questionnaire JSON Formatter Format, validate, minify with syntax highlighting QR Code Generator URLs, text, WiFi, email, phone, SMS Markdown Preview Live GFM editor with side-by-side preview Color Palette Generator Harmonious schemes from any base color Base64 Encoder/Decoder Text and file encoding/decoding Word Counter Words, characters, sentences, reading time CSV to JSON Auto-detect delimiters, instant conversion Lorem Ipsum Generator Paragraphs, sentences, or words —