ToolBookToolBook is a free online toolbox with calculators, formatters, and converters for developers, finance, and everyday use. Results are visual, instant, and built to be understood.
Format JSON, decode JWTs, generate UUIDs, encode Base64, and convert Unix timestamps. Every developer utility you would otherwise install or visit five different sites for, now in one browser tab. No npm install, no API key, no rate limits.
Plan a home loan EMI, project an SIP corpus, and work out a percentage discount. Animated charts and plain-English interpretations for every Indian and global money question. Inputs live in the URL so you can share a calculation on WhatsApp.
Generate meta tags, check keyword density, score readability, and create URL slugs. The SEO hygiene checks every page needs, free and instant.
Convert length, weight, temperature, and area; generate strong random passwords with entropy you can read; sanity-check a percentage in one keystroke. The small jobs you reach for every week, right here when you need them.
Count words, characters, sentences and paragraphs as you type. Reading-time and speaking-time estimates update instantly. Built for writers, editors, students, and anyone working against a deadline.
