The Professional’s
Handbook of Tools
236 calculators, converters and generators — tax, finance, PDF, images, code. Every entry runs entirely in your browser and asks for nothing in return.
Table of Contents
13 chapters · 236 entriesWorkflows for every situation
Pick a workflow that matches your goal — tools chain together from start to finish, all in your browser.
Freelance & Tax
Invoice, calculate tax, estimate quarterly payments, and plan retirement.
Job Search & Career
Rewrite your resume for ATS, compare offers, prepare for interviews — all locally.
Start a Business
Form an LLC, generate legal pages, calculate break-even, set up invoicing.
Resell & Side Hustle
Calculate profit margins, check sales tax nexus, compare platforms.
Knowledge Worker
Summarize meetings, draft emails, analyze contracts, generate reports — all locally.
Family & Household
Manage family schedules, track subscriptions, plan a move, organize digital estate.
Create & Publish
Resize images, generate captions, edit videos, optimize YouTube SEO.
Developer Tools
Format JSON, decode JWT, generate UUIDs, test regex, convert encodings.
Immigration & Visa
Check priority dates, estimate visa fees, track USCIS wait times.
Open a chapter
13 chapters · 236 tools — pick one to see its full toolkit.
Foreword
Why this handbook existsThere is no upload button — because there is no server.
Your files & data never leave your browser. Computation happens in your browser’s own sandbox — no accounts, no analytics on your inputs, nothing to breach. Audit it yourself with the network tab: open any tool and watch it make zero requests.
No loading, no signup — answers in milliseconds.
Calculations finish in milliseconds, not minutes. Every tool opens directly in your browser and works offline once loaded — no queue, no processing screen, no waiting.
Free to use. Pro if you push it.
Every one of the 236 entries in this handbook is fully functional the moment you open it — no signup, no watermarks. The free tier allows 5 downloads or saves per day; the optional Pro plan ($7/mo or $59/yr) lifts that and adds batch runs, unlimited downloads, white-label exports and an ad-free experience.
Built for every state, every country.
Tax brackets for all 50 US states, business tools for global freelancers, and developer utilities for everyone — wherever you file, invoice, or ship from.
Bookmark it once.
Consult it whenever you need it.
Free, account-free and local — the way a handbook should be.